摘要
为了提高锂硫电池的高倍率放电性能,采用了多孔的泡沫镍作集流体。通过循环伏安测试可知,泡沫镍作集流体时泡沫镍在充放电过程中并没有参与反应,而是相对于铝箔集流体降低了电池的氧化峰电势和提高了还原峰电势。充放电测试可知:泡沫镍作集流体时,锂硫电池表现出良好的高倍率放电性能,在1 C充放电下,以泡沫镍为集流体的锂硫电池首次放电比容量达到940 m Ah/g,经过100次循环后其放电比容量保持在508 m Ah/g左右。
In order to improve Li/S cells discharge capacity at high rate, porous nickel foam was used as current collectors. The cyclic voltammetry（CV） shows that nickel foam doesn＇t participate in the reactions during the process of charge/discharge. But using nickel foam current collectors had lower anodic peak potential and higher cathodic peak potential than using Al current collectors. The galvanostatic charge and discharge performance testing implied that using nickel foam current collectors contribute to improving Li/S cells discharge capacity at high rate. At the first cycle, the discharge capacity of Li/S cells with nickel foam current collectors could reach 940 m Ah/g at 1 C rate, and the discharge capacity still maintained about 508 m Ah/g at the 100 th cycle.
出处
《电源技术》
CAS
CSCD
北大核心
2016年第3期550-553,共4页
Chinese Journal of Power Sources
关键词
泡沫镍
铝箔
集流体
锂硫电池
nickel foam
aluminum foil
current collectors
Li/S cells
