氮掺杂的介-微孔碳/硫复合材料的性能  

Performance of nitrogen doped meso-microporous carbon/sulfur composite

作　　者：杨书廷[1,2] 田拴宝[1,2] 尹艳红[1,2] 岳红云[1,2] YANG Shu-ting TIAN Shuan-bao YIN Yan-hong YUE Hong-yun(School of Chemistry and Chemical Engineering,Henan Normal University,Xinxiang Henan 453007, China National ＆ Local Joint Engineering Laboratory for Motive Power and Key Materials ,Xinxiang ,Henan 453007, China)

机构地区：[1]河南师范大学化学化工学院,河南新乡453007 [2]动力电源及关键材料国家地方联合工程实验室,河南新乡453007

出　　处：《电池》2016年第5期247-250,共4页Battery Bimonthly

基　　金：河南省重点科技攻关项目(122102210234);河南省教育厅高校科技创新人才支持计划(14HASTIT004)

摘　　要：在真空高温条件下,通过热处理甘氨酸、碳纳米管（CNT）和单质硫,一步制备氮掺杂的介-微孔碳/硫复合材料。采用XRD、SEM、循环伏安和恒流充放电等方法,分析复合材料的结构、形貌及电化学性能。制备的复合材料用作锂/硫电池正极,与普通热熔法制备的硫/CNT相比,电化学阻抗降低了38.1%,在1.6~2.8 V循环,0.2 C首次放电比容量增加了24.4%,不同倍率下的循环性能平均提高21.4%。Meso-microporous carbon/sulfur composites have been synthesized by thermal treatment of mixture of glycine, carbon nanotubes（CNT） and sulfur using one-pot method under high-temperature vacuum conditions. The structure, morphology and electrochemical performance of the composites were investigated by XRD, SEM, cyclic vohammetry and galvanostatic charge- discharge tests. By comparing as-prepared composites to sulfur/CNT materials processed by thermal-melt infiltrated approach, the electrochemical impedance was reduced by 38. 1% ,when cycled in 1.6 - 2. 8 V, the initial specific discharge capacity was increased by 24. 4% at 0. 2 C,the cycle stability performance was raised on average by 21.4% at different rates.

关 键 词：单质硫 氮掺杂 硫/碳纳米管 锂硫电池 

分 类 号：TB332[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]