Preparation of layered oxide Li(Co1/3Ni1/3Mn1/3)O2 via the sol-gel process
来源期刊：Rare Metals2008年第2期
论文作者：ZHANG Wen LIU Hanxing HU Chen ZHU Xianjun LI Yanxi State Key laboratory of Advanced Technology for Material Synthesis and Processing,Wahan University of Technology ,Wuhan ,China
文章页码：158 - 164
摘 要：<正>To obtain homogenous layered oxide Li(Co1/3Ni1/3Mn1/3)O2 as a lithium insertion positive electrode material,the sol-gel process using citric acid as a chelating agent was applied.The material Li(Co1/3Ni1/3Mn1/3)O2 was synthesized at different calcination temperatures.XRD ex- periment indicated that the layered Li(Co1/3Ni1/3Mn1/3)O2 material could be synthesized at a lower temperature of 800"C,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 200 nm.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 irre- versible 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.
ZHANG Wen LIU Hanxing HU Chen ZHU Xianjun LI Yanxi State Key laboratory of Advanced Technology for Material Synthesis and Processing,Wahan University of Technology ,Wuhan 430070,China
摘 要：<正>To obtain homogenous layered oxide Li(Co1/3Ni1/3Mn1/3)O2 as a lithium insertion positive electrode material,the sol-gel process using citric acid as a chelating agent was applied.The material Li(Co1/3Ni1/3Mn1/3)O2 was synthesized at different calcination temperatures.XRD ex- periment indicated that the layered Li(Co1/3Ni1/3Mn1/3)O2 material could be synthesized at a lower temperature of 800"C,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 200 nm.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 irre- versible 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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