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Garnet and Li29Zr9Nb3O40 Modified PEO‐Based Hybrid Solid Electrolytes for All‐Solid‐State Lithium Metal Batteries.

Authors :
Liu, Qing
Lin, Haiqin
Zhao, Jie
Zhou, Bingxue
Zhang, Yudong
Cui, Can
Shen, Jiangwei
Dai, Weiji
Zhao, Cuijiao
Huang, Saifang
Source :
European Journal of Inorganic Chemistry; 8/23/2024, Vol. 27 Issue 24, p1-8, 8p
Publication Year :
2024

Abstract

Inorganic‐organic hybrid solid electrolytes (HSEs) are an important category of electrolyte materials for solid‐state batterie. It is of interest and importance to investigate the influence of composition and content of inorganic fillers on the electrochemical performance of HSEs. In this paper, we fabricated HSEs using polyethylene oxide (PEO) as matrix and incorporating different inorganic powders as active fillers. A series of HSEs with different contents of Ga/Nb co‐substituted garnet oxide (Li6.35Ga0.15La3Zr1.8Nb0.2O12, GN‐LLZO) and Y‐doped Li29Zr9Nb3O40 (Li29.3Zr8.7Y0.3Nb3O40, 0.3Y‐LZNO) were carefully designed. The ionic conductivity of these PEO‐based HSEs were studied, and their performance in solid‐state lithium‐ion batteries with LiFePO4 (LFP) as cathode material and Li metal as anode were evaluated. The results showed that the HSE with addition content of inorganic powders, namely PEOLiTFSI@5 % GN‐LLZO +5 %0.3Y‐LZNO (noted as PL3) showed the optimized ionic conductivity of 2.9×10−4 S cm−1 at room temperature with an activation energy Ea of 0.21 eV. It has an electrochemical stability window of 4.65 V and ionic transfer number of 0.242. The addition of inorganic powders not only enhanced the ionic conductivities of PEO‐based HSEs, but also exhibited superior stability and interfacial compatibility with electrodes, leading to the improved cycle stability in the LFP/PL3/Li solid‐state battery configuration. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
14341948
Volume :
27
Issue :
24
Database :
Complementary Index
Journal :
European Journal of Inorganic Chemistry
Publication Type :
Academic Journal
Accession number :
179238312
Full Text :
https://doi.org/10.1002/ejic.202400137