碳硫纳米复合正极材料的电化学性能  

Study on electrochemical property of carbon-sulfur nano-composite material as cathode

作　　者：郑伟[1] 张翠芬[1] 胡信国[1] 

机构地区：[1]哈尔滨工业大学应用化学系

出　　处：《电源技术》2005年第8期523-526,共4页Chinese Journal of Power Sources

基　　金：广东省重大科技专项基金(2003A1100101;2003C105006)

摘　　要：采用升华硫与高比表面积活性炭在一定条件下合成了一种新型碳硫纳米复合材料。用该复合材料作为正极活性物质所制备的锂蓄电池具有较好的循环性能和高的比容量、比能量。通过X射线衍射(XRD)、比表面积(BET)、扫描电子显微镜(SEM)等材料分析测试手段,对复合材料的物理化学性能进行了分析,利用循环伏安、交流阻抗和电池充放电对材料的电化学性能进行了测试。结果表明,与传统硫电极比较,此复合材料表现出了很好的电化学性能,其初始放电比容量高达600mAh·g-1,经过50次循环之后,比容量仍保持在400mAh·g-1。A novel carbon-sulfur nano-compositehigh surface area activated carbon （HSAAC）as cathode for lithiumin certain conditionsbattery was synthesized by heating sublimed sulfur and The cathode made by carbon-sulfur nano-composite materical shows a good cycle ability and a high specific charge-discharge capacity. The physics and chemistry performance were characterized by XRD,BET and SEM.The electrochemical performance of nano-composite was characterized by CV,EIS and charge-discharge experiment.The results indicate that the electrochemical capability of nano-composite material is better than that of traditional S-containing composite materical. The lithium-sulfur battery achieved higher specific capacity, energy and better cycle ability. Its initial discharge specific capacity was 600 mAh·g^-1, and specific capacity still kept as high as 400mAh.g^-1 after 50 cycles.

关 键 词：锂蓄电池 正极 新型碳硫纳米复合材料 升华硫 高比表面积活性炭 

分 类 号：TM912.4[电气工程—电力电子与电力传动]