本文从体相铁位掺杂出发,以二氧化钛、乙酸镍、乙酸锰、氢氧化镁等为原料,合成LiFe0.9M0.1PO4-C材料,考察了不同掺杂元素对LiFePO4性能的影响.与碳包覆LiFePO4材料相比较,Ti的掺杂使Li+扩散系数提高了两个数量级,达到4.117E-09 cm2·s-1；将材料的振实密度显著提高到了1.62 g/ml;循环30次,容量保持在79.8 mAh/g,保持率达92％.即铁位掺杂Ti的复合材料在高倍率下的性能远远好于未掺杂LiFePO4材料.
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