Synthesis and electrochemical properties of submicron LiNi0.8Co0.2O2 by a polymer-pyrolysis method |
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Authors: | Lifen Xiao Yanyan Yang Xinping Ai Yuliang Cao |
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Affiliation: | a Department of Chemistry, HuaZhong Normal University, Wuhan 430079, China b Department of Chemistry, Wuhan University, Wuhan 430072, China |
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Abstract: | A polymer-pyrolysis method was used to synthesize LiNi0.8Co0.2O2, which has potential application in lithium ion batteries. The effect of calcination temperature and time on the structure and electrochemical performance of the material was investigated. XRD analysis showed that the powders obtained by calcination at 750 °C for 3 h had the best-ordered hexagonal layer structure. SEM image showed these powders were fine, narrowly distributed with platelet morphology. The charge-discharge tests demonstrated these powders had the best electrochemical properties, with an initial discharge capacity of 189 mAh/g and capacity retention of 95.2% after 50 cycles when cycled at 50 mA/g between 3.0 and 4.3 V. Besides, these powders also had exhibited excellent rate capability. |
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Keywords: | LiNi0.8Co0.2O2 Polymer-pyrolysis Lithium ion battery Cathode material |
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