采用商品化中间相碳微球(MCMB)及人造石墨与中间相碳微球的混合体作为聚合物锂离子电池的负极材料,通过SEM、XRD对比研究了两种负极材料电化学循环前后的微观形貌和相结构,测试了两种聚合物锂离子电池的倍率放电性能和循环寿命,并通过交流阻抗谱分析了两种负极材料的电化学性能差异.结果表明:掺入人造石墨后,中间相碳微球的平均粒径和比表面积增大,电化学循环200次后的晶面间距减小、石墨化度增大,倍率放电性能降低,电荷转移电阻及锂离子扩散阻抗均增大,循环性能得到较大提高.
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