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Published in: Rare Metals 2/2024

18-11-2023 | Original Article

A lithium–tin fluoride anode enabled by ionic/electronic conductive paths for garnet-based solid-state lithium metal batteries

Authors: 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

Published in: Rare Metals | Issue 2/2024

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Abstract

The high energy density and stability of solid-state lithium metal batteries (SSLMBs) have garnered great attention. Garnet-type oxides, especially Li6.4La3Zr1.4Ta0.6O12 (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 application 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. Meanwhile, ionic/electronic conductive paths in situ formed at the interface can effectively uniform Li deposition and suppress Li dendrite. The solid-state symmetric cell exhibits low interface resistance (11 Ω·cm2) and high critical current density (1.3 mA·cm−2) at 25 °C. 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.

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Appendix
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Metadata
Title
A lithium–tin fluoride anode enabled by ionic/electronic conductive paths for garnet-based solid-state lithium metal batteries
Authors
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
Publication date
18-11-2023
Publisher
Nonferrous Metals Society of China
Published in
Rare Metals / Issue 2/2024
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI
https://doi.org/10.1007/s12598-023-02468-w

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