柠檬酸含量对LiFePO4/C复合正极材料形貌及电化学性能的影响

人工晶体学报, 2015, 44(5): 1176-1182.

柠檬酸含量对LiFePO4/C复合正极材料形貌及电化学性能的影响

云强 ^1, , 周园 ^2, , 申月 ^3, , 海春喜 ^4, , 李翔 ^5, , 张丽娟 ^6,

1.中国科学院青海盐湖研究所盐湖资源与化学重点实验室,西宁810008;中国科学院大学,北京100049

2.中国科学院青海盐湖研究所盐湖资源与化学重点实验室,西宁,810008

3.中国科学院青海盐湖研究所盐湖资源与化学重点实验室,西宁,810008

4.中国科学院青海盐湖研究所盐湖资源与化学重点实验室,西宁,810008

5.中国科学院青海盐湖研究所盐湖资源与化学重点实验室,西宁810008;中国科学院大学,北京100049

6.中国科学院青海盐湖研究所盐湖资源与化学重点实验室,西宁810008;中国科学院大学,北京100049

基金项目: National High Technology Research and Development Program of China(863) (2013AA110100) National Key Basic Research Program of China (973) (2014CB660806) Science and Technology Project of Xining City in 2014(2014-6-24) " West Light" Talents Training Program of Chinese Academy of Sciences (Y412041007)

关键词： LiFePO4/C , 柠檬酸 , 水热法

Effects of Citric Acid Content on the Morphology and Electrochemical Performance of LiFePO4/C Composite Cathode Materials

Keywords： LiFePO4/C , citric acid , hydrothermal method

采用水热-高温煅烧法制备了具有不同形貌的LiFePO4/C复合材料,探讨了柠檬酸含量对其形貌和电化学性能的影响.结果表明,柠檬酸的添加对LiFePO4/C复合材料的形貌具有显著的影响.通过添加柠檬酸调控LiFePO4/C复合材料的形貌,可以极大地改善LiFePO4/C复合材料的电化学性能.当柠檬酸与LiFePO4的摩尔比为1∶2时,LiFePO4/C复合材料呈纳米片状,颗粒粒径最小,比表面积最大,在0.1C和5C时放电比容量为160.3mA·h·g1和130.9 mA·h·g-1.

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