中文摘要：

研究碳含量对Li3V2（PO4）3正极材料的晶型结构、晶格参数、密度、颗粒平均粒度等性质的影响。发现无定型的碳不会影响Li3V2（PO4）3正极材料的晶型结构和晶格参数,但对材料颗粒大小和密度等有较大影响,随着碳含量的增加,材料的平均粒度和密度都呈变小趋势。将材料装配成CR2032扣式电池进行充放电循环性能测试表明,碳含量对材料的电化学性能有较大影响。进行小电流充放电循环时,随着碳含量的增加,材料的电化学性能逐渐提升,碳含量为10%时到达最佳;高倍率放电时则要求材料具有更高的碳含量。

英文摘要：

The effects of carbon content on the crystal structure, the lattice parameters, the density and the average particle size of the lithium vanadium phosphate cathode materials （Li3V2（PO4）3） were investigated. It is found that amorphous carbon can not change the crystal structure and the lattice parameters of the Li3V2（PO4）3 cathode materials, but it has effects on their density and the average particle size. The density and the average particle size of the Li3V2（PO4）3 are both reduced as the carbon content is increased. In addition, the electrochemical performance of the Li3V2（PO4）3 cathode materials was tested in CR2032 button battery. The tests show that when the materials are charged/discharged at low C-rate, their electrochemical performance is improved gradually as the carbon content is increased and it becomes best at 10% carbon-content; the materials require more carbon as the C-rate is increased.