Reasonable design a high-entropy garnet-type solid electrolyte for all-solid-state lithium batteries

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外文摘要：Traditional garnet solid electrolyte(Li7La3Zr2O12)suffers from low room temperature ionic conductivity,poor air stability,high sintering temperature and energy consumption.Considering the development pro-spects of high-entropy materials with high structural disorder and strong component controllability in the field of electrochemical energy storage,herein,a novel high-entropy garnet-type oxide solid elec-trolyte,Li5.75Ga0.25La3Zr0.5Ti0.5Sn0.5Nb0.5O12(LGLZTSNO)was constructed by partially replacing the Li and Zr sites in Li7La3Zr2O12 with Ga and Ti/Sn/Nb elements,respectively.The experimental and density functional theory(DFT)calculation results show that the high-entropy LGLZTSNO electrolyte has prefer-able room temperature ion conductivity,air stability,interface contact performance with lithium anode,and the ability to suppress lithium dendrites.Thanks to the improvement of electrolyte performance,the critical current density of Li/Ag@LGLZTSNO/Li symmetric cell was increased from 0.42 to 1.57 mA cm-2,and the interface area specific impedance(IASR)was reduced from 765.2 to 42.3 Ω cm2.Meanwhile,the Li/Ag@LGLZTSNO/LFP full cell also exhibits excellent rate performance and cycling performance(148 mA h g-1 at 0.1 C and 124 mA h g-1 at 0.5 C,capacity retention up to 84.8％after 100 cycles at 0.1 C),showing the application prospects of high-entropy LGLZTSNO solid electrolyte in high-performance all solid state lithium batteries.

外文关键词：

Garnet solid electrolyteDual-site substitutionHigh-entropyall solid-state lithium batteries(ASSLBs)

作者：

Shiyu Yu、Yandi Li、Jiaxin Luo、Daming Chen、Liang Yang、Yaqing Wei、De Li、Yuanxun Li、Yong Chen

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作者单位：

State Key Laboratory of Marine Resource Utilization in South China Sea,School of Materials Science and Engineering,Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources,Hainan University,Haikou 570228,Hainan,China

State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Science and Technology of China,Chengdu 610054,Sichuan,China

Guangdong Key Laboratory for Hydrogen Energy Technologies,School of Materials Science and Hydrogen Energy,Foshan University,Foshan 528000,Guangdong,China

基金：

Natural Science Foundation of ChinaKey Research and Development Project of Hainan Province

项目编号：

61901142ZDYF2022SHFZ093

出版年：

2024

DOI：

10.1016/j.jechem.2024.04.048

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.96(9)