| Preparation of layered oxide Li（Co1/aNi1/3Mn1/3）O2 via the sol-gel process |
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| 作者单位： | ZHANG Wen（State Key Laboratory of Advanced Technology for Material Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China） ;
LIU Hanxing（State Key Laboratory of Advanced Technology for Material Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China） ;
HU Chen（State Key Laboratory of Advanced Technology for Material Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China） ;
ZHU Xianjun（State Key Laboratory of Advanced Technology for Material Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China） ;
LI Yanxi （State Key Laboratory of Advanced Technology for Material Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China） ; |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金，The Foundafion for Innovative Research Team of Hubei Province of China |
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| 摘 要： | To obtain homogenous layered oxide Li(Co1/3Ni1/3Ni1/3Mn1/3)O2 as a lithium insertion positive electrode material,the sol-gel process using citric acid as a chelating agent was applied.The material Li(Co1/3,Ni1/3Mn1/3)O2 was synthesized at different calcination temperatures.XRD experiment indicated that the hyered Li(Co1/3Ni1/3Mn1/3)O2material could he synthesized at a lower temperature of 800℃,and the oxidation state of Co,Ni,and Mn in the cathode confirmed by XPS were 3, 2,and 4,respectively.SEM observations showed that the synthesized material could form homogenous particle morphology with the particle size of about 200nm In spite of different calcination temperatures,the charge-discharge curves of all the samples for the initial cycle were similar,and the cathode synthesized at 900℃ showed a small irreversible capacity loss of 11.24% and a high discharge capacity of 212.2 mAh.g-1 in the voltage range of 2.9-4.6 V.
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| 关 键 词： | 层状过度 金属氧化 锂电池 电容量 |
| 收稿时间： | 20 March 2007 |
| 修稿时间： | 21 December 2007 |
Preparation of layered oxide Li(Co1/3Ni1/3Mn1/3)O2 via the sol-gel process |
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| Authors: | ZHANG Wen LIU Hanxing HU Chen ZHU Xianjun LI Yanxi |
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| Affiliation: | State Key Laboratory of Advanced Technology for Material Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,China |
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| Abstract: | To obtain homogenous layered oxide Li(Co1/3Ni1/3Ni1/3Mn1/3)O2 as a lithium insertion positive electrode material,the sol-gel process using citric acid as a chelating agent was applied.The material Li(Co1/3,Ni1/3Mn1/3)O2 was synthesized at different calcination temperatures.XRD experiment indicated that the hyered Li(Co1/3Ni1/3Mn1/3)O2material could he synthesized at a lower temperature of 800℃,and the oxidation state of Co,Ni,and Mn in the cathode confirmed by XPS were 3, 2,and 4,respectively.SEM observations showed that the synthesized material could form homogenous particle morphology with the particle size of about 200nm In spite of different calcination temperatures,the charge-discharge curves of all the samples for the initial cycle were similar,and the cathode synthesized at 900℃ showed a small irreversible capacity loss of 11.24% and a high discharge capacity of 212.2 mAh.g-1 in the voltage range of 2.9-4.6 V. |
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| Keywords: | lithium-ion battery layered transition metal oxide sol-gel process high capacity |
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