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Modification of lithium iron phosphate by metal ion and carbon
Author(s): ZHANG Pei-xin, WEN Yan-xuan, LIU Bo, LIU Jian-hong, REN Xiang-zhong, LUO Zhong-kuan, XU Qi-ming
Pages: 250-
253
Year: 2008
Issue:
2
Journal: JOURNAL OF FUNCTIONAL MATERIALS
Keyword: 锂离子电池; 正极材料; LiFePO4; 金属离子掺杂; 碳包覆;
Abstract: 为提高LiFePO4的充放电性能,用化学沉淀法制备了金属离子和蔗糖碳复合改性的磷酸铁锂,具有很好的大电流性能,主要原因是金属离子体掺杂和表面包覆导电碳黑提高材料自身的导电能力和电极中颗粒间的导电能力.其中Li0.98Ti0.02FePO4/C在320mA/g(约2C)的比容量>126mAh/g,充放电循环20次后放电比容量仍保持在96%以上.
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