A Pore-Forming Strategy Toward Porous Carbon-Based Substrates for High Performance Flexible Lithium Metal Full Batteries

查看全文 作　　者：Yanfei [1,2]Li;Shuyang [1]Ye;Jian [1]Lin;Yihan [3]Song;Xinglong [1]Wu;Jingping [1]Zhang;Changlu [2]Shao;Zhongmin [1]Su;Haizhu [1]Sun;Dwight [3]S.Seferos

机构地区：[1]College of Chemistry,National&Local United Engineering Laboratory for Power Batteries,Northeast Normal University,Changchun 5268,China;[2]Center for Advanced Optoelectronic Functional Materials Research,and Key Laboratory of UV-Emitting Materials and Technology(Northeast Normal University),Ministry of Education,Changchun 130024,China;[3]Department of Chemistry,University of Toronto,Toronto,M5S 3H6,Canada

出　　处：《Energy & Environmental Materials》索引2023年第6卷第3期,共9页

基　　金：supported by NSFC(22035001,21574018,51433003);the National Science and Engineering Council of Canada,and the Fundamental Research Funds for the Central Universities(2412019ZD002)。 摘　　要：Self-standing carbon-based substrates with satisfied structural stability and property adjustability have promising applications in flexible lithium(Li)metal batteries(FLMBs).Current strategies for modifying carbon materials are normally carried out on powder carbon,and very few of them are suitable for self-standing carbon substrates.Herein,a pore-forming strategy based on the redox chemistry of metallic oxide nanodots is developed to prepare two porous carbon substrates for anode and cathode.Starting with cotton cloth,the resulting hollow carbon fibers substrate with nanopores effectively prevents from Li dendrites formation and large volume change in lithium metal anode(LMA).Simulations indicate that the porous structure leads to homogeneous ion flux,Li-ion concentration,and electric field during Li deposition.Li symmetrical cell based on this substrate remains stable for 8300 h with an ultralow voltage hysteresis of 9 mV.Via a similar route,porous carbon cloth substrate is obtained for subsequently seeding V_(2)O_(5)nanowires to prepare the cathode.The assembled FLMBs pouch cell delivers a capacity of 8.2 mAh with a high capacity retention of~100%even under dramatic deformation.The demonstrated strategy has far-reaching potential in preparing free-standing porous carbon-based materials for flexible energy storage devices. 关键词：dual-function carbon substrates flexible lithium metal full batteries lithium metal anode porous structure V_(2)O_(5)cathode

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A Pore-Forming Strategy Toward Porous Carbon-Based Substrates for High Performance Flexible Lithium Metal Full Batteries

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