高性能硫/碳凝胶复合正极材料的制备及应用  

A High Performance Sulfur/Carbon Xerogel Composite in Lithium Sulfur Battery Application

作　　者：王翀[1] 陈嘉嘉[1] 佘秋洁[1] 张倩[1] 施一宁[1] 郑明森[1] 董全峰[1] 

机构地区：[1]厦门大学固体表面物理化学国家重点实验室,化学化工学院化学系,福建厦门361005

出　　处：《电化学》2010年第2期168-171,共4页Journal of Electrochemistry

基　　金：国家自然科学基金项目(200933005;20903077);973项目(2009CB220102);福建省科技项目(2008H0087)资助

摘　　要：以碳凝胶作导电骨架,合成硫/碳凝胶复合物.XRD、SEM等表征显示,该复合材料完全保持了碳凝胶的形貌,颗粒大小在10μm以下,硫吸附在碳凝胶内部空隙中呈无定形态,表现出良好的电化学性能.以0.1C放电,该材料首圈放电容量达到1311mAh/g.0.2C循环充放,首圈放电容量为1107.1mAh/g,30周充放电后,放电容量仍不低于800mAh/g.Sulfur/carbon composite was synthesized by the thermal method with the carbon xerogel as the conductive framework. The property of composite was characterd by XRD and SEM. It shown that the composite with the particle size below 10 μm had the same morphology as the carbon xerogel and the sulfur was absorbed in the pores in non-crystalline. The discharge capacity of the composites were 1311 mAh/g and 1107. 1 mAh/g at 0. 1C and 0. 2 C rates,respetively. And a retention capacity was about 800 mAh/g after 30 cylcyes.

关 键 词：锂硫电池 碳凝胶 复合材料 正极材料 

分 类 号：O646[理学—物理化学] TM912.9[理学—化学]