Inhibiting Formation and Reduction of Li2 CO3 to LiCx at Grain Boundaries in Garnet Electrolytes to Prevent Li Penetration

© 2023 Wiley-VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 12 vom: 13. März, Seite e2208951
1. Verfasser: Biao, Jie (VerfasserIn)
Weitere Verfasser: Han, Bing, Cao, Yidan, Li, Qidong, Zhong, Guiming, Ma, Jiabin, Chen, Likun, Yang, Ke, Mi, Jinshuo, Deng, Yonghong, Liu, Ming, Lv, Wei, Kang, Feiyu, He, Yan-Bing
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article LLZO grain boundary Li2CO3 Lithium penetration mechanism ion/electron transport
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520 |a Poor ion and high electron transport at the grain boundaries (GBs) of ceramic electrolytes are the primary reasons for lithium filament infiltration and short-circuiting of all-solid-state lithium metal batteries (ASLMBs). Herein, it is discovered that Li2 CO3 at the GBs of Li7 La3 Zr2 O12 (LLZO) sheets is reduced to highly electron-conductive LiCx during cycling, resulting in lithium penetration of LLZO. The ionic and electronic conductivity of the GBs within LLZO can be simultaneously tuned using sintered Li3 AlF6 . The generated LiAlO2 (LAO) infusion and F-doping at the GBs of LLZO (LAO-LLZOF) significantly reduce the Li2 CO3 content and broaden the energy bandgap of LLZO, which decreases the electronic conductivity of LAO-LLZOF. LAO forms a 3D continuous ion transport network at the GB that significantly improves the total ionic conductivity. Lithium penetration within LLZO is suppressed and an all-solid-state LiFePO4 /LAO-LLZOF/Li battery stably cycled for 5500 cycles at 3 C. This work reveals the chemistry of Li2 CO3 at the LLZO GBs during cycling, presents a novel lithium penetration mechanism within garnet electrolytes, and provides an innovative method to simultaneously regulate the ion and electron transport at the GBs in garnet electrodes for advanced ASLMBs 
650 4 |a Journal Article 
650 4 |a LLZO grain boundary 
650 4 |a Li2CO3 
650 4 |a Lithium penetration mechanism 
650 4 |a ion/electron transport 
700 1 |a Han, Bing  |e verfasserin  |4 aut 
700 1 |a Cao, Yidan  |e verfasserin  |4 aut 
700 1 |a Li, Qidong  |e verfasserin  |4 aut 
700 1 |a Zhong, Guiming  |e verfasserin  |4 aut 
700 1 |a Ma, Jiabin  |e verfasserin  |4 aut 
700 1 |a Chen, Likun  |e verfasserin  |4 aut 
700 1 |a Yang, Ke  |e verfasserin  |4 aut 
700 1 |a Mi, Jinshuo  |e verfasserin  |4 aut 
700 1 |a Deng, Yonghong  |e verfasserin  |4 aut 
700 1 |a Liu, Ming  |e verfasserin  |4 aut 
700 1 |a Lv, Wei  |e verfasserin  |4 aut 
700 1 |a Kang, Feiyu  |e verfasserin  |4 aut 
700 1 |a He, Yan-Bing  |e verfasserin  |4 aut 
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773 1 8 |g volume:35  |g year:2023  |g number:12  |g day:13  |g month:03  |g pages:e2208951 
856 4 0 |u http://dx.doi.org/10.1002/adma.202208951  |3 Volltext 
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