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以Li、Ni和Co等金属离子与柠檬酸和纤维素配位,制成柠檬酸-纤维素前导化合物,再合成不同粒径的LiNi0.8Co0.2O2材料粉末.通过BET、FTIR和SEM等方法对所制备的LiNi0.8Co0.2O2材料进行表征分析,探讨了粒径大小对电极材料电化学性能的影响.结果表明:比表面积随粒径的增大而降低,放电电容量随着粒径的减小而增加,放电电容量可达到115.8mAh/g.“,”Firstly,the citric acid-cellulose precursors were prepared by coordinating the Li,Ni and Co with citric acid and cellulose.Then the LiNi0.8Co0.2O2 material powders with different crystal sizes have been synthesized.The LiNi0.8Co0.2O2 material was characterized by BET,FT-IR and SEM.The effects of crystal size on the electrochemical performance of electrode material were investigated.The results showed that the specific area decreaseed with the increase of crystal size;the discharge capacity increaseed with the decreasing of crystal size,and its discharge capacity could achieve 115.8mAh/g.