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A robust Janus bilayer with tailored ionic conductivity and interface stability for stable Li metal anodes

查看全文 作　　者：Guodong [1]Zhang;Pengwei [2]Li;Kai [2]Chen;Hongfei [1]Zheng;Wei [1]He;Liangping [2]Xiao;Xingyun [2]Li;Qingchi [2]Xu;Jian [2]Weng;Jun [2,3]Xu 高影响力作者 机构地区：[1]Department of Biomaterials,College of Materials,Xiamen University,Xiamen 361005,Fujian,China;[2]bDepartment of Physics,Research Institute for Biomimetics and Soft Matter,Fujian Provincial Key Laboratory for Soft Functional Materials,Xiamen University,Xiamen 361005,Fujian,China;[3]Shenzhen Research Institute of Xiamen University,Shenzhen 518057,Guangdong,China高影响力机构 出　　处：《Journal of Energy Chemistry》索引2022年第31卷第11期,共9页高影响力期刊 基　　金：financially supported by the National Natural Science Foundation of China(21771154);the Shenzhen Fundamental Research Programs(JCYJ20190809161013453);the Fundamental Research Funds for the Central Universities(20720220031);the 111 Project(B16029)。 摘　　要：The formation and growth of Li-dendrites caused by inhomogeneous Li deposition severely hinder the commercial applications of Li metal batteries due to the consequence of short-circuiting.Herein,we propose a Janus bilayer composed of black phosphorus(BP)and graphene oxide(GO)as an artificial interface with chemical/mechanical stability and well-regulated Li-ion flux distribution for Li metal anode protection.Owing to the synergy between the fast Li-ion transport of BP in the inner layer and the high mechanical and chemical stability of GO in the outer layer,the GO/BP with good electrolyte wettability acts as a Li-ion regulator that can induce homogeneous growth of Li to suppress the Li dendrites growth.Accordingly,long-term stability(500 h at 1 mA cm^(-2))with a low overpotential of 30 mV is achieved in the symmetric cell with GO/BP-Li anode.Furthermore,the Li–S cell with GO/BP-Li exhibits enhanced cycling performance with a high capacity retention rate of 76.2%over 500 cycles at 1 C. 关 键 词：Graphene oxide(GO) Black phosphorus(BP) Artificial interface Janus bilayer Li metal batteries
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