摘要
设计并制备了一种新型正极材料多硫化碳炔,并通过拉曼光谱扫描、X射线衍射等手段对其结构进行了表征。电化学性能研究表明,该材料具有较高的充放电效率与良好的循环性能,0.4mA/cm2放电制度下60次循环后比容量仍能达到400mAh/g,容量保持率可达64.5%,充放电效率接近100%。
The products obtained by co-heating carbon containing earbyne moieties and element sulfur were characterized by Raman and XRD, and it was proved to have carbon skeleton with polysulfide attached on it, which resembles the theoretical structure of carbyne＇polysu^de. This material exhibits a high capacity of 600 mAh/g at 0.4 mA/cm^2 and a very stable reversible capacity of 400 mAh/g after 60 cycles. The efficiency of the material reaches almost 100% during charge/discharge cycles.
出处
《上海化工》
CAS
2009年第7期10-12,共3页
Shanghai Chemical Industry
关键词
锂电池
正极材料
多硫化碳炔
Lithium battery
Cathode material
Carbyne--polysulfide
