多孔碳的模板比例对锂硫电池性能的影响  

Effect of template ratio of porous carbon on the performance of lithium-sulfur battery

作　　者：左敏[1] 齐微宇 李合琴[1] 黄依琴[1] 唐琼[1] 张静[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2017年第6期742-746,共5页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省高等学校自然科学研究重点资助项目(KJ2009A091;KJ2012A228);中央高校基本科研业务费专项资金资助项目(4115100010);中国科学院战略性先导科技专项资助项目(XDA03040000)

摘　　要：文章采用不同质量比的葡萄糖和碳酸钙模板制备了3种多孔碳,再与单质硫复合成3种硫碳正极材料;测试计算了3种多孔碳的比表面积和孔径分布,观测分析了硫碳复合材料的形貌结构,测试了电池的电化学性能。研究结果表明:当葡萄糖与碳酸钙的质量比为4∶4时,制备的多孔碳与硫复合后装配的电池电化学性能最优;在0.2C的放电倍率下锂硫电池首次放电容量为1 480 mA·h/g,100次循环后仍能保持在630mA·h/g,库伦效率接近100%。Three kinds of mesoporous carbon were prepared according to different mass ratio of D-glucose and nano-calcium carbonate. Elemental sulfur and mesoporous carbon were mixed into three kinds of cathodic ma- terials. The surface area and pore size distribution of the three kinds of porous carbon were calculated, the morphology and structure of the sulfur/carbon composite were observed and analyzed, and the electrochemical performance of the battery was tested. The results show that the electrochemical performance of the battery is the best when the mass ratio of D glucose and calcium carbonate is 4 ： 4. Its initial discharge capacity is high to 1 480 mA· h/g at 0. 2C, the reversible specific capacity maintains 630 mA · h/g after 100 cycles, and the coulombic efficiency is close to 100%.

关 键 词：锂硫电池 多孔碳 硫/碳复合材料 电化学性能 

分 类 号：TM911[电气工程—电力电子与电力传动]