硫化亚铜-聚吡咯(Cu_2S-PPy)复合材料的制备及其性能研究

Study on the Production of Cu_2S-PPy composite Materials and Its Properties

采用原位化学氧化聚合法制备了前驱体S-PPy复合材料,然后利用在铜集电极上充放电过程原位制备Cu2S-PPy复合材料,并对其作为电池正极材料的性能进行了测试表征.实验结果显示,Cu_2S-PPy复合材料具有良好的电化学循环性能和倍率性能,在0.2 C(1 C=337 m A·g^(-1))下首次可逆容量达297.4 m Ah·g^(-1),50次循环后仍保持在270.2 m Ah·g^(-1),容量基本没有损失.

S-PPy precursor is synthesised by in-situ oxidation method,and then Cu_2S-PPy composite was prepared by using the charge-discharge processes of the as-obtained S-PPy composites precursor on the copper electrode,its electrochemical performance as cathode material of batteries is studied. The results show that： Cu_2SPPy exhibits long cycle stability and high reversible capacity,it deliver an initial reversible capacity of 297. 4m Ah·g- 1at 0.2 C,it maintains reversible capacity of 270. 2 m Ah·g^（-1）over 50 cycles,Cu_2S-PPy composite has a negligible capacity loss.