柔性锂金属电池用无枝晶生长的碳基复合锂电极  

Dendrite-free carbon/lithium metal anodes for use in flexible lithium metal batteries

作　　者：陈筱薷 张睿 程新兵[1] 张强[1] CHEN Xiao-ru;ZHANG Rui;CHENG Xin-bing;ZHANG Qiang(Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China)

机构地区：[1]清华大学化学工程系,绿色反应工程与工艺北京市重点实验室,北京100084

出　　处：《新型炭材料》2017年第6期600-604,共5页New Carbon Materials

基　　金：国家重点研发计划(2016YFA0202500,2015CB932500);国家自然科学基金(21676160);清华大学自主科研基金(20161080166);大学生科研与创业计划~~

摘　　要：柔性储能器件是推动柔性电子器件持续发展的关键动力,也是展示储能技术的高端平台。金属锂负极具有极高的比容量、最低的还原电势以及优异的机械柔性,是高比能二次电池最有前景的负极材料。然而,采用金属锂构筑柔性的锂金属电池易在负极侧产生锂枝晶,带来电池安全隐患和较低的循环寿命,阻碍锂金属电池的实际应用。本文采用石墨烯和金属锂复合形核柔性复合电极,通过碳骨架中引入的杂原子诱导金属锂均匀成核,实现负极侧无枝晶生长,并展示了其在柔性高比能锂金属电池中的应用。Flexible energy storage devices are of great importance for the rapid growth of flexible electronic devices.Metallic lithium is considered a core anode material in high energy density rechargeable batteries because of its high theoretical specific energy density,the lowest redox potential,and high mechanical flexibility.However,safety issues and a short cycle life induced by lithium dendrites restrict the practical uses of lithium metal batteries.Here we described a nitrogen doped graphene/lithium metal composite as an anode,in which the Li metal nucleation and growth was guided by doped heteroatoms in the graphene framework.Dendrite free plating/stripping behavior was detected on the composite anode and its use in flexible lithium sulfur batteries was validated.

关 键 词：柔性电池 锂金属负极 锂枝晶 石墨烯复合电极 能源材料 

分 类 号：TM912[电气工程—电力电子与电力传动]