摘要
利用恒流充放电、循环伏安和交流阻抗等电化学方法对化学氧化合成的聚吡咯作为锂离子电池正极材料的电化学性能进行了研究,并利用红外光谱对聚合物循环前后的结构进行观察。结果表明,聚吡咯的首次放电比容量达97.9 mAh/g,25次循环后降为76.5 mAh/g;聚吡咯具有较好的电化学可逆性和活性;聚吡咯正极在15次循环后,结构保持不变。
The performance of polypyrrole（PPy） prepared by chemical-oxidative polymerization as cathode material in Li-ion battery was investigated by galvanostatic discharge, cyclic voltammetry and AC impedance. The structure characteristics of PPy were studied by infrared absorption spectroscopy. The results indicated that the specific discharge capacity of PPy was 97.9 mAh/ g in the initial cycle and decreased to 76.5 mAh/g after 25 cycles. The electrochemical reversibility and activity of PPy were good. The structure of PPy was unchanged after 15 cycles.
出处
《电池》
CAS
CSCD
北大核心
2008年第2期109-111,共3页
Battery Bimonthly
基金
河南省教育厅攻关项目(2006530006)
