以磷酸铁锂和活性炭为复合正极、以钛酸锂为负极的混合电池,其充放电性能受正极活性物质配比的影响.考察了正极中不同的活性炭和磷酸铁锂含量配比对混合电池能量密度和功率密度的影响.对LiFePO_4-AC/Li_4Ti_5O_(12)混合电池主要采用恒流充放电测试方法.对混合电池正极活性物质的含量配比进行优化可以改善混合电池的比容量和比功率.结果表明,当正极活性物质磷酸铁锂的含量为70%时,混合电池的充放电性能最好.
The charge/discharge properties of (LiFePO_4-AC)/Li_4Ti_5O_(12) hybrid cells are affected by the ratio of LiFePO_4 to AC in the composite positive electrode. In this work the influence of different contents of LiFePO_4 and AC in the positive electrode on specific energy and specific power of the hybrid cells is studied, mainly using the method of charge/discharge test. The results show that the hybrid cells with the best charge/discharge properties are those containing 70% LiFePO_4 in the positive electrode.
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