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张强报告:Nanostructured Li Metal AnodeProtection in Safe Li Metal Batteries

创建于2017年03月28日 星期二作者 : wlxyuser1 浏览量 :

报告人:张强研究员

联系人:马建民、王双印教授

时间:2017-3-29上午10:30-12:00

地点:新化工楼D区报告厅

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报告摘要:Li metal is consideredas the “Holy Grail” of energy storage systems. The bright prospects give riseto worldwide interests in the metallic Li for the next generation energystorage systems, including highly considered rechargeable metallic Li batteriessuch as Li-O2 and Li-sulfur (Li–S) batteries. However, the formation of Lidendrites induced by inhomogeneous distribution of current density on the Limetal anode and the concentration gradient of Li ions at theelectrolyte/electrode interface is a crucial issue that hinders the practicaldemonstration of high-energy-density metallic Li batteries.Free-standinggraphene foam provides several promising features as underneath layer for Lianode, including (1) relative larger surface area than 2D substrates to lowerthe real specific surface current density and the possibility of dendritegrowth, (2) interconnected framework to support and recycle dead Li, and (3)good flexibility to sustain the volume fluctuation during repeatedincorporation/extraction of Li. The synergy between the LiNO3 and polysulfidesprovides the feasibility to the formation of robust SEI in an ether-basedelectrolyte. The efficient in-situ formed SEI-coated graphene structure allowsstable Li metal anode with the cycling Coulombic efficiency of ~97 % with highsafety and efficiency performance. These results indicated that interfacialengineering of nanostructured electrode were a promising strategy to handle theintrinsic problems of Li metal anodes, thus shed a new light toward LMBs, suchas Li-S and Li-O2 batteries with high energy density.References[1]X. B. Cheng, et al, Small 2014, 10, 4257.[2]X. B. Cheng, et al. ACS Nano 2015, 9, 6373.[3]R. Zhang, et al. Adv Mater 2016, 28, 2155.[4]X.B. Cheng, et al. Adv Mater 2016, 28, 2888.[5]Zhao CZ, et al. Energy Storage Materials 2016, 3, 77.[6]Cheng XB, et al. Advanced Science 2016, 3, 1500213.[7] Cheng XB, et al.Chem 2017, 2, 258.

报告人简介:张强,清华大学研究员,从事能源相关新材料技术研究。曾获得万人计划青年拔尖人才、英国皇家学会Newton Advanced Fellowship、国家自然科学基金优秀青年基金、The 2012-2015 Excellence in Review Awards for CARBON、2015 most prolific reviewers forAdv. Mater.等奖励。担任J Energy Chem编辑、RSC Adv副主编、Sci Rep编辑、Energy Storage Mater客座编辑。从事能源材料,尤其是金属锂、锂硫电池、电催化及三维石墨烯的科学研究。主持国家重点研发计划课题、自然科学基金、教育部博士点基金、北京市科委等项目。担任NatureEnergy、Sci.Adv.、JACS、Adv.Mater.、Angew.Chem. Int. Ed.等期刊特约审稿人或仲裁人。以第一作者/通讯作者在Adv.Mater.,J. Am. Chem. Soc., Angew. Chem. Int. Ed.,Nature Commun., Sci. Adv., Chem等发表SCI收录论文100余篇;所发论文引用10000次,h因子为54,35篇为ESI高引用学术论文。

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