首页|A lithium-tin fluoride anode enabled by ionic/electronic conductive paths for garnet-based solid-state lithium metal batteries
A lithium-tin fluoride anode enabled by ionic/electronic conductive paths for garnet-based solid-state lithium metal batteries
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The high energy density and stability of solid-state lithium metal batteries(SSLMBs)have garnered great attention.Garnet-type oxides,especially Li6.4La3Zr1.4-Ta0.6O12(LLZTO),with high ionic conductivity,wide electrochemical window,and stability to Li metal anode,are promising solid-state electrolyte(SSEs)materials for SSLMBs.However,Li/LLZTO interface issues including high interface resistance,inhomogeneous Li deposition,and Li dendrite growth have hindered the practical appli-cation of SSLMBs.Herein,a multi-functional Li-SnF2 composite anode with Li,LiF,and Li-Sn alloy was specifically designed and prepared.The composite anode improves the wettability to LLZTO,constructing an intimate contact interface between it and LLZTO.Mean-while,ionic/electronic conductive paths in situ formed at the interface can effectively uniform Li deposition and suppress Li dendrite.The solid-state symmetric cell exhi-bits low interface resistance(11 Ω·cm2)and high critical current density(1.3 mA·cm-2)at 25 ℃.The full SSLMB based on LiFePO4 or LiNi0.5Co0.2Mn0.3O2 cathode also shows stable cycling performance and high rate capability.This work provides a new composite anode strategy for achieving high-energy density and high-safety SSLMBs.
Solid-state lithium metal batteries(SSLMBs)Lithium-tin fluoride anodeIonic/electronic conductiveInterface resistanceLithium dendrite
Lei Zhang、Qian-Kun Meng、Xiang-Ping Feng、Ming Shen、Yu-Qing Zhang、Quan-Chao Zhuang、Run-Guo Zheng、Zhi-Yuan Wang、Yan-Hua Cui、Hong-Yu Sun、Yan-Guo Liu
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School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China
School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China
School of Materials and Physics,China University of Mining &Technology,Xuzhou 221116,China
Institute of Electronic Engineering,China Academy of Engineering Physics,Mianyang 621900,China
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国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金National Safety Academic FundNational Safety Academic FundNational Safety Academic Fund
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