PREPARATION OF POLYPYRROLE/ CARBON BLACK CONDUCTINGCOMPOSITES BY ADSORPTION POLYMERIZATION
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摘要: 用炭黑吸附化学氧化聚合法制备聚吡咯/ 炭黑( PPy/ C) 导电复合材料。运用FT2IR、TGA、SEM、四探针和电化学测试仪对材料的组成、结构和性能进行了测试和表征。导电炭黑的加入不仅提高了材料的电导率,由原来的6.152 S/ cm 增加至13.42 S/ cm, 而且提高了材料的堆积密度, 改善了聚吡咯的颗粒形态和制膜加工性能, 聚吡咯复合材料为正极的锂/ 聚吡咯二次电池的性能得以改善, 室温下充放电循环30 次以上, 电池容量无明显衰减, 库仑效率在98 %以上, 首次放电容量以聚吡咯计可达41 mAh/ g。Abstract: Polypyrrole/ carbon black conducting composites were prepared by chemical polymerization adsorbedpolypyrrole onto conducting carbon black. The constitution, st ructure and performances of the composites werestudied and characterized by FT-IR, TGA, SEM, four-probe and elect rochemical test measurement s. The int roduction of conducting carbon black not only increases the conductivity f rom 6.52 S/ cm to 13.42 S/ cm but also improvesthe bulk density, particle morphology and the film molding property of the composites. Consequently the performances of Li/ PPy secondary battery are enhanced when the composites are employed as positive elect rode materials. Itwas found that the initial specific discharge capacity of the battery reaches 41 mAh/ g calculated by PPy, and the discharge capacity shows a slight decrease and the coulombic efficiency is still over 98 % af ter 30 charge-discharge cyclesat room temperature.
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Keywords:
- conducting carbon black /
- polypyrrole /
- adsorption polymerization /
- bulk density /
- secondary battery
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