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以纳米硅为原料,聚苯胺(PANI)为碳源,通过球磨法和高温热解制备了硅/热解聚苯胺(Si/p-PANI)复合物作为锂离子电池负极材料,并研究了热解温度对复合材料性能的影响。采用XRD、SEM、TEM、FTIR及XPS方法对复合材料的结构、形貌和组成进行了表征;采用恒流充放电和CV等方法测试了材料的电化学性能。研究结果表明,Si/p-PANI可以抑制纳米硅颗粒之间的团聚,并形成良好的导电网络。700℃热解后得到的Si/p-PANI在400 m A g-1电流密度下循环50次,可逆比容量为1051.1 m A h g-1,具有良好的电化学性能。
Polyaniline (PANI) was used as carbon source and Si / P-PANI composites were prepared by ball milling and high temperature pyrolysis as negative electrode materials for lithium ion batteries. The effects of heat Effect of Solution Temperature on the Properties of Composites. The structure, morphology and composition of the composites were characterized by XRD, SEM, TEM, FTIR and XPS methods. The electrochemical properties of the composites were tested by constant current charge-discharge and CV. The results show that Si / p-PANI can inhibit the agglomeration of nano-silicon particles and form a good conductive network. Si / p-PANI obtained after pyrolysis at 700 ℃ was cycled 50 times at a current density of 400 m A g-1 with a reversible specific capacity of 1051.1 m A h g-1, showing good electrochemical performance.