硫碳复合电极材料对锂硫电池性能的影响  

Effects of S/C composite cathode on performance of lithium/sulfur battery

作　　者：余劲鹏[1,2] 陈一劲 丁飞[2] 唐致远[1] 刘兴江[1,2] 

机构地区：[1]天津大学化工学院,天津300072 [2]中国电子科技集团公司第十八研究所化学与物理电源重点实验室,天津300384 [3]天津工业大学材料科学与工程学院,天津300160

出　　处：《电源技术》2013年第10期1742-1744,1759,共4页Chinese Journal of Power Sources

基　　金：化学与物理电源技术重点实验室基金项目(9140C-160203120C 16074)

摘　　要：利用商品化的S uper-P(S P)和ketjenblack(K B)作为硫载体,通过热处理制备了两种硫碳复合物,评估了其对锂硫电池性能的影响。与常规电极相比,采用热处理制备的两种复合物制备的电极,循环性能都有所提高,但可逆容量较低。通过提高电极的导电能力,可大幅提高复合物的综合电化学性能。在电池制备中,发现对硫碳混合物进行热处理后,硫电极能明显获得较高的活性物质载量,使得其比能量并没有明显降低。Two kinds of sulfur/carbon composites were prepared by thermally treating a mixture of elemental sulfur with commercial Super-P （SP） and KB carbon materials,and their electrochemical properties were evaluated for lithium/sulfur batteries. The cycle performance of the electrodes with sulfur/carbon composites is better than that of the conventional one, although the reversible capacity of the former one is lower than that of the later one. It is found that the electrochemical performance of the composite can be significant improved by enhancing the conductivity of the electrode. In the practical cell, the electrodes with sulfur/carbon composites exhibited the higher sulfur loading capability, so the their specific energy were close to that of the conventional electrode.

关 键 词：锂硫二次电池 单质硫 硫碳复合物 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]