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中文摘要：
应用聚丙烯酸盐热解法合成掺杂Cr^3＋或Mg^2＋、Mn^2＋、Ni^2＋的LiFePO4正极材料，研究掺杂离子对目标化合物电化学性质的影响．XRD和SEM实验表明，该材料微米级颗粒是由约200nm的粒子团聚而成的，具有橄榄石型结构，且未出现杂质相．电化学测试表明，掺cr^3＋“的LiFePO4在高倍率（3C）放电下的首周放电容量为97mAh／g，相当于0．15C率容量的66％，其循环性能优异，充分显示离子掺杂能显著改善材料的高倍率放电性能和循环性能．
英文摘要：
Ohvine Li1-x MxFePO4 （ M = Cr^3＋ 、 Mg^2＋ 、 Mn^2＋ 、 Ni^2＋ ） were synthesized by a polyacrylates-pyrolysis route. The structural and electrochemical properties of the as-synthesized cathode materials were investigated by powder X-ray diffraction （ XRD）, scanning electron microscopy （ SEM）, and electrochemical charge/discharge cycling. The results indicate that the metallic ions doped at low concentration do not affect the crystalline structure of the material, but considerably improve the rate capability and cycle performance of LiFePO4 at high rate.
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