Precursor-template strategy toward hollow nanostructured Li(Ni1/3Co1/3Mn1/3)O2 Microspheres cathode with enhanced electrochemical performance
作者：
Kang, Zhenya;Wang, Yourong* ;Yao, Mengzhi;Cheng, Siqing*
期刊：
International Journal of Electrochemical Science ,2018年13(7):6771-6778 ISSN：1452-3981
通讯作者：
Wang, Yourong;Cheng, Siqing
作者机构：
[Kang, Zhenya; Wang, YR; Cheng, SQ; Wang, Yourong; Cheng, Siqing; Yao, Mengzhi] Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, YR; Cheng, SQ] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
关键词：
Li(Ni1/3Co1/3Mn1/3)O-2 ( NCM);Precursor template;cathode materials;Lithium ion batteries (LIBs);Electrochemical performance
摘要：
The hollow nanostructured Li(Ni1/3Co1/3Mn1/3)O2 (NCM) microspheres with low Li/Ni disorder were fabricated by precursor-template approach and investigated electrochemically as lithium ion batteries (LIBs) cathode. The as-obtained NCM microspheres cathode exhibits high specific capacity, good coulombic efficiency and outstanding rate capability. This might mainly be due to the unique hollow nanostructured architectures of the NCM microspheres enabling to shorten Li+ diffusion and electron transportation paths in the materials, which is verified via the cyclic voltammetry (CV) at various scan rate to obtain the high apparent Li+ diffusion coefficient for the discharge/charge processes. © 2018 Published by ESG.
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英文
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Reduced graphene oxide -coated 3D interconnected SiO2 nanoparticles with enhanced lithium storage performance
作者：
Guo, Xu;Xie, Kai;Wang, Yourong* ;Kang, Zhengya;Zhou, Wei;...
期刊：
International Journal of Electrochemical Science ,2018年13(6):5645-5653 ISSN：1452-3981
通讯作者：
Wang, Yourong;Cheng, Siqing
作者机构：
[Guo, Xu; Xie, Kai; Wang, YR; Cheng, SQ; Wang, Yourong; Cheng, Siqing; Zhou, Wei; Kang, Zhengya] Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, YR; Cheng, SQ] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
关键词：
Anode materials;Lithium ion batteries;SiO 2;Sol-gel method
摘要：
3D interconnected SiO2 nanoparticles coated by reduced graphene oxide (rGO) (SiO2@rGO) were fabricated easily by online hydrolysis and subsequent condensation of the precursor tetraethylorthosilicate (TEOS) in the dispersed graphene oxide (GO) sol, followed by the reduction of GO using hydrazine hydrate. The as-obtained 3D interconnected SiO2 nanoparticles coated by rGO composites as anode material for lithium ion rechargeable batteries (LIBs) delivers a reversible discharge capacity of 490.7 mAh g-1 at a current density of 100 mA g-1 after 60 cycles with the coulombic efficiency of nearly 98%. Compared to the bare nano-SiO2, the enhanced lithium storage performance could be attributed to its unique 3D interconnected network space structure to accommodate the volume variation during cycled lithiation/delithiation process. © 2018 The Authors.
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英文
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A facile synthesis of hierarchical MoS2 nanotori with advanced lithium storage properties
作者：
Xie, Kai;Liu, Zhenghao;Wang, Yourong* ;Song, Guangsen;Cheng, Siqing*
期刊：
NEW JOURNAL OF CHEMISTRY ,2018年42(13):10935-10939 ISSN：1144-0546
通讯作者：
Wang, Yourong;Cheng, Siqing
作者机构：
[Xie, Kai; Wang, YR; Cheng, SQ; Wang, Yourong; Cheng, Siqing; Song, Guangsen; Liu, Zhenghao] Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, YR; Cheng, SQ] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
关键词：
disulfide;lithium;molybdenum complex;molybdenum disulfide;nanorod;nanotube;unclassified drug;Article;cyclic potentiometry;high resolution transmission electron microscopy;lithiation;nanofabrication;precursor;priority journal;scanning electron microscopy;surface property;synthesis;X ray diffraction
摘要：
MoS2 with a 2D layered structure and high theoretical capacity has been regarded as a promising candidate for anode materials in lithium ion batteries. But its poor cyclic stability and low rate capability hinder its practical applications. Herein, hierarchical MoS2 nanotori consisting of MoS2 nanosheets with an increased interlayer distance were synthesized by a facile hydrothermal reaction for the first time. A possible formation mechanism of the hierarchical MoS2 nanotori is proposed based on the scanning electronic microscopy (SEM) results and the influence of the MoO3 precursor on the morphology of the MoS2 obtained. The hierarchical MoS2 nanotori display superior reversible capacity, good rate capability and improved cyclic performance, which can be attributed to their hierarchical surface, hollow structure feature and increased layer distance. The formation mechanism of hierarchical MoS2 nanotori proposed here should offer a new technique for the design and synthesis of MoS2 with different morphologies using MoO3 as the growth template.
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英文
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Hierarchically Porous Carbon Derived from Peanut Shells for High-performance Lithium-sulfur Batteries
作者：
Zhu, Lei;Wang, Yourong* ;Xie, Kai;Song, Guangsen;Cheng, Siqing*
期刊：
Chemistry Letters ,2018年47(2):236-239 ISSN：0366-7022
通讯作者：
Wang, Yourong;Cheng, Siqing
作者机构：
[Zhu, Lei; Xie, Kai; Wang, YR; Cheng, SQ; Wang, Yourong; Cheng, Siqing; Song, Guangsen] Wuhan Polytech Univ, ICNEM, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, YR; Cheng, SQ] W;Wuhan Polytech Univ, ICNEM, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
关键词：
Lithium-sulfur batteries;Hierarchically porous carbon (HPC);Peanut shell
摘要：
Lithium-sulfur (Li-S) batteries are considered to be a promising energy storage device because of their high theoretical energy density and relatively low cost. But low rate performance and poor cycle stability arising from the poor electronic conductivity and the shuttling of polysulfide intermediates hamper its practical application. In order to address these shortcomings, hierarchically porous carbon (HPC) derived from peanut shells is employed as a host to accommodate sulfur for the first time. As-prepared HPC possesses a hierarchically porous structure with a relatively high specific surface area of 1775.7m2 g-1 and a large pore volume of 1.457 cm3 g-1. When as-prepared HPC was employed as cathode hosts for lithiumsulfur batteries, it was found that S/HPC composite displayed an excellent electrochemical performance. The initial discharge capacity of 1659.8mAh g-1 is reached at 0.5C and a reversible capacity of 815.7mAh g-1 can be maintained after 100 cycles. Even if the current density increases to 3C, the specific capacity still is as high as 736.9mAh g-1. ©2018 The Chemical Society of Japan.
语种：
英文
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High capacitance LiMn2O4 microspheres with different microstructures as cathode material for aqueous asymmetric supercapacitors
作者：
Xiao, Haowen;Wang, Yourong* ;Xie, Kai;Cheng, Siqing* ;Cheng, Xianzhong
期刊：
Journal of Alloys and Compounds ,2018年738:25-31 ISSN：0925-8388
通讯作者：
Wang, Yourong;Cheng, Siqing
作者机构：
[Cheng, Xianzhong; Xie, Kai; Wang, YR; Cheng, SQ; Wang, Yourong; Cheng, Siqing; Xiao, Haowen] Wuhan Polytech Univ, ICNEM, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, YR; Cheng, SQ] W;Wuhan Polytech Univ, ICNEM, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
关键词：
Activated carbon;Capacitance;Carbon;Cathodes;Electrodes;Electrolytes;Lithium-ion batteries;Manganese compounds;Microspheres;Microstructure;Supercapacitor;Aqueous electrolyte;Asymmetric supercapacitor;Electrochemical performance;High energy densities;High power density;LiMn2O4;Reversible capacity;Specific capacitance;Lithium compounds
摘要：
Asymmetric supercapacitors (ASCS) with a battery-type electrode and a capacitor-type electrode have been regarded as the most promising energy-storage devices with high-energy and high-power densities. In this paper, the porous and hollow LiMn2O4 microspheres were prepared using MnCO3 microspheres as template and subsequently an ASCS with the as-prepared LiMn2O4 as cathode and activated carbon (AC) as anode in Li2SO4 aqueous electrolyte (designated by AC//LiMn2O4 ASCS) was assembled and investigated electrochemically. The results indicate that the porous LiMn2O4 exhibits a higher reversible capacity and rate capability compared to hollow LiMn2O4 microspheres, and delivers a specific capacitance of 536 F g−1 at 1 mV s−1. The assembled AC//porous LiMn2O4 ASCS presents a high energy density of 33.12 Wh kg−1 at the power density of 90 W kg−1. All these might be attributed to the unique microstructure of the as-prepared porous LiMn2O4 microspheres. © 2017 Elsevier B.V.
语种：
英文
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Mesoporous silica nanoparticles as high performance anode materials for lithium-ion batteries
作者：
Wang, Yourong;Xie, Kai;Guo, Xu;Zhou, Wei;Song, Guangsen;...
期刊：
NEW JOURNAL OF CHEMISTRY ,2016年40(10):8202-8205 ISSN：1144-0546
通讯作者：
Cheng, Siqing
作者机构：
[Guo, Xu; Xie, Kai; Wang, Yourong; Cheng, Siqing; Song, Guangsen; Zhou, Wei] Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Cheng, Siqing] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
关键词：
lithium ion;mesoporous silica nanoparticle;Article;controlled study;current density;cyclic potentiometry;diffusion;electric battery;electrochemical analysis;isotherm;particle size;priority journal;scanning electron microscopy;X ray powder diffraction
摘要：
A facile sol-gel/emulsion approach was employed for the fabrication of mesoporous silica nanoparticles with a large BET specific surface area of 1594 m2 g-1. The as-prepared SiO2 electrode delivers a highly stable specific capacity of as large as 1060 mA h g-1 at a current density of 100 mA g-1 after 90 cycles, exhibiting a good cycling stability. © 2016 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.
语种：
英文
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Facile Synthesis of Hollow Co9S8 Nanospheres for High Performance Pseudocapacitor
作者：
Zhang, Liping;Wang, Yourong;Zhou, Wei;Song, Guangsen;Cheng, Siqing*
期刊：
International Journal of Electrochemical Science ,2016年11(2):1541-1548 ISSN：1452-3981
通讯作者：
Cheng, Siqing
作者机构：
[Wang, Yourong; Cheng, Siqing; Song, Guangsen; Zhou, Wei; Zhang, Liping] Wuhan Polytech Univ, ICNEM, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Cheng, Siqing] W;Wuhan Polytech Univ, ICNEM, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
关键词：
Co9S8;Electrochemical performance;Hollow nanosphere;Pseudocapacitor
摘要：
The hollow Co9S8 nanospheres with ca. 50 nm were elaborately fabricated by a facile solvothermal method and characterized by powder X-ray diffraction (XRD), Scanning electron microscopy (SEM) and BET measurement to result in a specific surface area of 226 m(2) g(-1). The prepared hollow Co9S8 nanosphere electrode delivers a initial specific capacitance of 234.7 F g(-1) at a current density of 0.5 A g(-1), which can be retained up to the 60th cycle, indicating the good cycleability and excellent rate capability. As a consequence, the energy density of the prepared Co9S8 pseudocapacitor could reach up to 17.96 Wh kg(-1) at a power density of 32.82 W kg(-1), which is much more than those of common electric double capacitors, exhibiting the pseudocapacitive characteristic. This might be due to the unique hollow Co9S8 nanosphere structure to shorten the path of the electron transportation and the ionic diffusion.
语种：
英文
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A non-aqueous hybrid supercapacitor with porous anatase TiO2 nanoparticles anode and activated carbon cathode
作者：
Wang, Dan;Xie, Kai;Wang, Yourong;Cheng, Siqing*
期刊：
International Journal of Electrochemical Science ,2016年11(12):9776-9782 ISSN：1452-3981
通讯作者：
Cheng, Siqing
作者机构：
[Xie, Kai; Wang, Dan; Wang, Yourong; Cheng, Siqing] Wuhan Polytech Univ, Innovat Ctr Nanomat Energy & Med, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Cheng, Siqing] W;Wuhan Polytech Univ, Innovat Ctr Nanomat Energy & Med, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
关键词：
Electrochemical performance;Hybrid supercapacitor;Non-aqueous electrolyte;Porous anatase TiO 2
摘要：
The porous anatase TiO2 nanoparticles were synthesized by a facile hydrothermal method and characterized by scanning electronic microscopy (SEM), transmission electronic microscopy (TEM) and powder X-ray diffraction (XRD). A non-aqueous hybrid supercapacitorwith the as-prepared TiO2 nanoparticles anode and activated carbon (AC, BP-2000) cathode was fabricated and investigated electrochemically. The results showed that the hybrid supercapacitor with the optimal mass ratio 1:2 of AC to TiO2 delivers a specific capacitance of 48 F g-1 at a current rate of 100 mA g-1 and exhibits a good cycling stability. Within a voltage window of 0-3 V, 60.75 W h kg-1 of energy is acquired at 150 W kg-1, indicating the promising application of such hybrid supercapacitor in achieving both high energy density and power density to power the burgeoning hybrid electric vehicles (HEVs)/electric vehicles (EVs). © 2016 The Authors.
语种：
英文
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Capacitive Nanosized Spinel alpha-LiFe5O8 as High Performance Cathodes for Lithium-ion Batteries
作者：
Zhou, Wei* ;Wang, Yourong;Zhang, Liping;Song, Guangsen;Cheng, Siqing
期刊：
International Journal of Electrochemical Science ,2015年10(6):5061-5068 ISSN：1452-3981
通讯作者：
Zhou, Wei
作者机构：
[Wang, Yourong; Cheng, Siqing; Song, Guangsen; Zhou, Wei; Zhang, Liping] Wuhan Polytech Univ, ICNEM, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Zhou, Wei] W;Wuhan Polytech Univ, ICNEM, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
关键词：
alpha-LiFe5O8;Cathodes;Capacitive;Lithium-ion batteries
摘要：
The nanosized spinel α-LiFe5O8 with a grain size of about 10 nm was fabricated by a facile solid state method via the assistance of oxalic acid. The as-prepared α-LiFe5O8 electrode for lithium ion battery delivers a high reversible initial specific capacity of 257.1 mA h g-1 at 28 mA g-1 and remaining at 130 mAh g-1 at as high as 2820 mA g-1 even after 100 cycles, as well as excellent rate capability and improved cycling stability, which has not reported before for lithium ferrite oxides. This might be attributed to the characteristic pseudocapacitive behavior of lithium storage in nanosized spinel α-LiFe5O8 and the structural stability of α-LiFe5O8 upon charge/discharge as well, as evidenced by CV measurement for the as-prepared α-LiFe5O8 electrode. The unique combination of those features for lithium ion battery and capacitor is potential to develop high performance hybrid energy storage device for the needs of electric vehicle batteries and other high powder applications. © 2015 The Authors.
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英文
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Anatase TiO2 Hollow Nanospheres with Ultrathin Shell Exhibit Superior Lithium Storage Property
作者：
Zhou, Wei* ;Wang, Yourong;Zhang, Liping;Song, Guangsen;Cheng, Siqing
期刊：
International Journal of Electrochemical Science ,2015年10(7):5942-5949 ISSN：1452-3981
通讯作者：
Zhou, Wei
作者机构：
[Wang, Yourong; Cheng, Siqing; Song, Guangsen; Zhou, Wei; Zhang, Liping] Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Zhou, Wei] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
关键词：
Anatase TiO2;Hollow nanospheres;Electrochemical performance;Anode materials;Lithium-ion battery
摘要：
TiO2 hollow nanospheres with ultrathin shell of ca.10 nm were prepared by using sulfur nanospheres as templates and its electrochemical performance was investigated as anode material for lithium ion battery. The results show that the as-obtained anatase TiO2 exhibits superior lithium storage capability due to its characteristic lithium storage mechanism and somewhat pseudocapacitive property. The as-obtained anatase TiO2 electrode delivered a high initial specific capacity of 574.5 mAh g-1 at 168 mA g-1 and displays excellent cycling performance after first cycle, which might be attributed to the improvement of ionic and electron conduction of anatase TiO2 due to the unique hollow nanostructure with ultrathin shell. © 2015 The Authors.
语种：
英文
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Interlayer Distance Dependency of Lithium Storage in MoS2 as Anode Material for Lithium-ion Batteries
作者：
Qian, Xiaofang* ;Wang, Yourong;Zhou, Wei;Zhang, Liping;Song, Guangsen;...
期刊：
International Journal of Electrochemical Science ,2015年10(4):3510-3517 ISSN：1452-3981
通讯作者：
Qian, Xiaofang
作者机构：
[Wang, Yourong; Cheng, Siqing; Song, Guangsen; Qian, Xiaofang; Zhou, Wei; Zhang, Liping] Wuhan Polytech Univ, Sch Chem & Environm Engn, Innovat Ctr Nanomat Energy & Med, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Qian, Xiaofang] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Innovat Ctr Nanomat Energy & Med, Wuhan 430023, Hubei, Peoples R China.
关键词：
Anode material;Interlayer distance;Lithium-ion battery;MOS2
摘要：
Polyvinyl pyrrolidone (PVP) as dispersant was employed to assist the hydrothermal synthesis of MoS2. The results show that the interlayer distance of the as-obtained MoS2 is smaller compared with the original MoS2 without PVP-assistance using XRD, SEM and TEM techniques for characterization. Investigations of the electrochemical performances of MoS2 with different interlayer distance as anode material for LIBs demonstrate that the specific capacity and the cycling performance of lithium storage of MoS2 is significantly dependent on the interlayer distance of MoS2, furthermore causing the different mechanism of lithium storage. This might be attributed to the varied internal resistance and Li-ion diffusion in layered MoS2 due to the different interlayer distance, which is validated from electrochemical impedance spectroscope of MoS2 electrode. © 2015 The Authors.
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英文
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SiO2@NiO core-shell nanocomposites as high performance anode materials for lithium-ion batteries
作者：
Wang, Yourong;Zhou, Wei;Zhang, Liping;Song, Guangsen;Cheng, Siqing*
期刊：
RSC Advances ,2015年5(77):63012-63016 ISSN：2046-2069
通讯作者：
Cheng, Siqing
作者机构：
[Wang, Yourong; Cheng, Siqing; Song, Guangsen; Zhou, Wei; Zhang, Liping] Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Cheng, Siqing] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
摘要：
SiO<inf>2</inf>@NiO core-shell nanocomposites of ca. 80 nm in diameter with a thin NiO shell were assembled via a facile online deposition of NiO and investigated as an anode for lithium ion batteries. The results indicated that the specific discharge capacity of the obtained SiO<inf>2</inf>@NiO core-shell nanocomposite electrode still retains 585 mA h g<sup>-1</sup>at a discharge current density of 100 mA g<sup>-1</sup>after 60 cycles and presents a coulombic efficiency of almost 100%, exhibiting good cycling stability and excellent rate capability after the first few cycles. This might be accounted for by the reversible lithiation/delithiation of the product Si due to the irreversible lithiation of SiO<inf>2</inf>while the irreversible lithiation of NiO to produce metal Ni nanoparticles is responsible for the activation of SiO<inf>2</inf>, which is demonstrated by comparing the cyclic voltammetries (CVs) and electrochemical impedance spectra (EIS) of SiO<inf>2</inf>, NiO and SiO<inf>2</inf>@NiO electrodes. ©2015 The Royal Society of Chemistry.
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英文
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One-pot triethanolamine-assisted hydrothermal synthesis of Ag/ZnO heterostructure microspheres with enhanced photocatalytic activity
作者：
Chai, Bo* ;Wang, Xing;Cheng, Siqing;Zhou, Huan;Zhang, Fen
期刊：
Ceramics International ,2014年40(1):429-435 ISSN：0272-8842
通讯作者：
Chai, Bo
作者机构：
[Zhang, Fen; Cheng, Siqing; Chai, Bo; Zhou, Huan; Wang, Xing] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.
通讯机构：
[Chai, Bo] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Peoples R China.
关键词：
Ag/ZnO heterostructure microsphere;Hydrothermal synthesis;Photocatalytic activity;Triethanolamine
摘要：
The Ag/ZnO heterostructure microspheres were prepared via a simple one-pot triethanolamine (TEA)-assisted hydrothermal route and characterized by X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), X-ray Photoelectron Spectroscopy (XPS), UV-vis Diffuse Reflectance Absorption Spectra (DRS) and Photoluminescence Spectra (PL), demonstrating that Ag nanoparticles were attached on the surface of ZnO microspheres. The photocatalytic degradation of Rhodamine B (RhB) by the as-synthesized Ag/ZnO microspheres was investigated and optimized, indicating the best photocatalytic performance of Ag/ZnO of 1:150 (mol/mol). This may be attributed to the charge separation of photogenerated electrons and holes by Ag/ZnO heterostructure microspheres, which is interpreted by the proposed mechanism for Ag/ZnO heterostructure microspheres as catalyst. © 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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英文
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Comparison of Electrochemical Activity of Nanosized alpha-LiFeO2 Cathode Materials for Li-ion Secondary Battery Using Different Current Collectors
作者：
Wang, Jia* ;Wang, Yourong;Zhou, Wei;Qian, Xiaofang;Wang, Min;...
期刊：
International Journal of Electrochemical Science ,2014年9(7):3961-3968 ISSN：1452-3981
通讯作者：
Wang, Jia
作者机构：
[Wang, Yourong; Cheng, Siqing; Qian, Xiaofang; Wang, Jia; Wang, Min; Zhou, Wei] Wuhan Polytech Univ, ICNEM, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, Jia] W;Wuhan Polytech Univ, ICNEM, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
关键词：
Nanosized alpha-LiFeO2 cathode material;Current collector;Electrochemical activity;Lithium-ion batteries
摘要：
Nanosized α-LiFeO2 cathode material for the Li-ion secondary battery using microporous carbon paper or aluminum current collectors was investigated. The results show that nanosized α-LiFeO2 electrode using microporous carbon paper current collector exhibits much higher discharge capacity than that using aluminum current collector although the cell reaction mechanism is not dependent on the current collector. Moreover, the discharge capacity for the nanosized α-LiFeO2 electrode using microporous carbon paper current collector at different discharge rate is approximately close. This may be attributed to the unique structure and electrochemical stability of microporous carbon paper.© 2014 The Authors.
语种：
英文
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Facile synthesis of electrochemically active α-LiFeO2 nanoparticles in absolute ethanol at ambient temperature
作者：
Wang, Yourong* ;Wang, Jia;Liao, Hantao;Qian, Xiaofang;Wang, Min;...
期刊：
RSC Advances ,2014年4(8):3753-3757 ISSN：2046-2069
通讯作者：
Wang, Yourong
作者机构：
[Liao, Hantao; Wang, Yourong; Cheng, Siqing; Song, Guangsen; Qian, Xiaofang; Wang, Jia; Wang, Min] Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, Yourong] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
摘要：
The synthesis of electrochemically active α-LiFeO<inf>2</inf> nanoparticles in absolute ethanol at ambient temperature was developed using LiOH·H<inf>2</inf>O and Fe(NO<inf>3</inf>)<inf>3</inf>·9H <inf>2</inf>O as starting materials and characterized by X-ray diffraction (XRD), Scanning Electronic Microscopy (SEM), Transmission Electron Microscopy (TEM). The electrochemical performance of the α-LiFeO<inf>2</inf> nanoparticles as cathode materials for lithium secondary batteries showed that the initial discharge capacity of α-LiFeO<inf>2</inf> (theoretical capacity of 282 mA h g<sup>-1</sup>) nanoparticles was 290.6, 194, and 183.8 mA h g<sup>-1</sup> at 0.1, 1 and 2 C, respectively, which was one of the previous reported highest values. Especially, α-LiFeO<inf>2</inf> nanoparticles exhibited improved cycle stability at 2 C. The capacity retention was around 55.2% with the discharge capacity of 101.5 mA h g<sup>-1</sup> after 50 cycles at 2 C. ©2013 The Royal Society of Chemistry.
语种：
英文
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Hierarchical nanostructured FeS2 hollow microspheres for lithium-ion batteries
作者：
Wang, Yourong;Qian, Xiaofang;Zhou, Wei;Liao, Hantao;Cheng, Siqing*
期刊：
RSC Advances ,2014年4(69):36597-36602 ISSN：2046-2069
通讯作者：
Cheng, Siqing
作者机构：
[Liao, Hantao; Wang, Yourong; Cheng, Siqing; Qian, Xiaofang; Zhou, Wei] Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Cheng, Siqing] W;Wuhan Polytech Univ, Sch Chem & Environm Engn, ICNEM, Wuhan 430023, Hubei, Peoples R China.
摘要：
The hierarchical nanostructured FeS2 hollow microspheres composed of nanoflakes were fabricated based on Ostwald ripening using sulfur powder as sulfur source and triethanolamine as both solvent and reducing agent, and electrochemically investigated as cathode material for lithium-ion batteries. The as-obtained FeS2 electrode delivered an initial capacity of 886.3 mA h g−1 at 0.1 C at ambient temperature, which is one of the highest values in the reported results. In the subsequent cycles following the first cycle, the electrode exhibited good reversibility at ambient temperature, resulting in good cycling stability and performance, and the discharge capacity of 392.7 mA h g−1 at 1 C was still retained after 30 cycles. This might be attributed to the unique FeS2 structure with hierarchical nanostructured hollow microspheres, showing potential to develop FeS2 cathode materials with high energy density for lithium-ion batteries.
语种：
英文
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Synthesis of macroporous FeS2 Nanotubes and their electrochemical properties
作者：
Liao, Hantao;Wang, Yourong* ;Wang, Jia;Qian, Xiaofang;Cheng, Siqing
期刊：
Advanced Materials Research ,2013年774-776(1550):677-681 ISSN：1022-6680
通讯作者：
Wang, Yourong
作者机构：
[Liao, Hantao; Wang, Yourong; Cheng, Siqing; Qian, Xiaofang; Wang, Jia] Wuhan Polytech Univ, Chem & Environm Engn Dept, Wuhan 430023, Peoples R China.
通讯机构：
[Wang, Yourong] W;Wuhan Polytech Univ, Chem & Environm Engn Dept, Wuhan 430023, Peoples R China.
会议名称：
2013 International Forum on Mechanical and Material Engineering, IFMME 2013
会议时间：
13 June 2013 through 14 June 2013
会议地点：
Guangzhou, PEOPLES R CHINA
会议主办单位：
[Liao, Hantao;Wang, Yourong;Wang, Jia;Qian, Xiaofang;Cheng, Siqing] Wuhan Polytech Univ, Chem & Environm Engn Dept, Wuhan 430023, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Electrochemical Performance;Solvothermal Method;FeS2 Nanotubes;Lithium-Ion Battery
摘要：
<jats:p>The particle size and morphology have a strong influence on the electrochemical performance of FeS<jats:sub>2</jats:sub>electrodes. In this paper, a simple one-pot solvothermal method is reported for the synthesis of macroporous pyrite nanotubes for the first time. The phase composition, morphology and structure of the as-o<jats:italic>b</jats:italic>tained products were studied by the energy dispersive spectroscopy (EDS), scanning electron microscopy, (high-resolution) transmission electron microscopy, X-ray diffraction. The electrochemical properties of the FeS<jats:sub>2</jats:sub>samples were also investigated. The results demonstrated that the macroporous pyrite nanotubes delivered a higher initial discharge capacity of 925.2 mAh g<jats:sup>-1</jats:sup>and had good capacity retention.</jats:p>
语种：
英文
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The surfactant assisted synthesis of MoS2 nanospheres with improved lithium storage properties
作者：
Wang, Yourong* ;Liao, Hantao;Wang, Jia;Qian, Xiaofang;Cheng, Siqing
期刊：
Advanced Materials Research ,2013年785-786:787-791 ISSN：1022-6680
通讯作者：
Wang, Yourong
作者机构：
[Liao, Hantao; Wang, Yourong; Cheng, Siqing; Qian, Xiaofang; Wang, Jia] Wuhan Polytech Univ, Chem & Environm Engn Dept, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, Yourong] W;Wuhan Polytech Univ, Chem & Environm Engn Dept, Wuhan 430023, Hubei, Peoples R China.
会议地点：
Guangzhou, PEOPLES R CHINA
会议主办单位：
[Wang, Yourong;Liao, Hantao;Wang, Jia;Qian, Xiaofang;Cheng, Siqing] Wuhan Polytech Univ, Chem & Environm Engn Dept, Wuhan 430023, Hubei, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Electrochemical performance;Hydrothermal method;Lithium-ion batteries;MoS2 nanospheres
摘要：
A facile process was developed to synthesize MoS2 nanospheres by a simple PVP assisted hydrothermal method. The samples were characterized by XRD, SEM and Electrochemical tests. SEM demonstrates that the obtained MoS2 has sphere-like morphology in the presence of surfactant PVP. Electrochemical measurements show that the initial discharge capacity of the MoS2 nanospheres is 1915.1, 895.8 and 761.6 mAh g-1 at current densities of 100, 400 and 800 mA g-1, respectively. Meanwhile, it is found that the MoS2 nanospheres have improved rate capacity and cycle stability.
语种：
英文
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Synthesis and Characterization of Nanosized alpha-LiFeO2 with Increased Electrochemical Activity
作者：
Wang, Yourong* ;Wang, Jia;Liao, Hantao;Qian, Xiaofang;Zhu, Yuchan;...
期刊：
International Journal of Electrochemical Science ,2013年8(6):8730-8739 ISSN：1452-3981
通讯作者：
Wang, Yourong
作者机构：
[Liao, Hantao; Zhu, Yuchan; Wang, Yourong; Cheng, Siqing; Qian, Xiaofang; Wang, Jia] Wuhan Polytech Univ, Chem & Environm Engn Dept, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, Yourong] W;Wuhan Polytech Univ, Chem & Environm Engn Dept, Wuhan 430023, Hubei, Peoples R China.
关键词：
alpha-LiFeO2;Electrochemical performance;Lithium-ion batteries;Solid state method
摘要：
In this work, nanosized α-LiFeO2 were synthesized by a simple low-temperature solid state method. The obtained α-LiFeO2 nanoparticles were investigated by the measurements of X-ray diffraction pattern, scanning electronic microscopy, transmission electron microscope and electrochemical performance. Electrochemical measurements showed that the initial discharge capacity was 277.9, 188.4, and 158.2 mAh g-1 at 0.1 C, 1 C, and 2 C, respectively. Meanwhile, the α-LiFeO2 nanoparticles exhibited improved cycle stability (123 mAh g-1 at 2 C after 60 cycles). The high capacity, improved rate performance and cycle stability can be attributed to the smaller particle sizes, which can facilitate the contact between active materials and the electrolyte, enhance lithium and electron transport during cycling. © 2013 by ESG.
语种：
英文
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Effects of Current Collectors on Electrochemical Performance of FeS2 for Li-ion Battery
作者：
Wang, Yourong* ;Liao, Hantao;Wang, Jia;Qian, Xiaofang;Zhu, Yuchan;...
期刊：
International Journal of Electrochemical Science ,2013年8(3):4002-4009 ISSN：1452-3981
通讯作者：
Wang, Yourong
作者机构：
[Liao, Hantao; Zhu, Yuchan; Wang, Yourong; Cheng, Siqing; Qian, Xiaofang; Wang, Jia] Wuhan Polytech Univ, Chem & Environm Engn Dept, Wuhan 430023, Hubei, Peoples R China.
通讯机构：
[Wang, Yourong] W;Wuhan Polytech Univ, Chem & Environm Engn Dept, Wuhan 430023, Hubei, Peoples R China.
关键词：
Current collector;Cyclic voltammetry;Electrochemical properties;FeS2 electrode;Lithium ion battery
摘要：
The effects of current collectors on the electrochemical performance of FeS2 electrode have been investigated by applying three types of current collectors, including an Al foil, a Cu foil and a Ni foil. The results show that Ni current collector can greatly improve the discharge capacity and cycle ability of FeS2 electrode compared to the Al current collector. Cyclic voltammetry and electrochemical impedance spectroscopy also show that the electrodes on the Ni foil show much smaller polarization and lower impedance. Although Cu foil is utilized as anode current collector in the conventional lithium ion batteries, it can react with FeS2 during the charge/discharge process, so Cu current collector may also be unsuitable to other metallic sulfide electrode except CuS electrode for lithium ion batteries. These results mean that adopting Ni foil as the current collector is more suitable for metallic sulfide electrodes. © 2013 by ESG.
语种：
英文
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