In-situ construction of multifunctional interlayer enabled dendrite-free garnet-based solid-state batteries

被引：40

作者：

Zhu, Fangjun ^{[1
]}

Deng, Wentao ^{[1
]}

Zhang, Baichao ^{[1
]}

Wang, Haoji ^{[1
]}

Xu, Laiqiang ^{[1
]}

Liu, Huaxin ^{[1
]}

Luo, Zheng ^{[1
]}

Zou, Guoqiang ^{[1
]}

Hou, Hongshuai ^{[1
]}

Ji, Xiaobo ^{[1
]}

机构：

[1] Cent South Univ, Coll Chem & Chem Engn, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

来源：

NANO ENERGY | 2023年 / 111卷

基金：

中国国家自然科学基金;

关键词：

Garnet-based inorganic electrolyte; Li metal solid-state battery; Interface issue; Li dendrite; Multifunctional interlayer; INTERFACE; GROWTH; ELECTROLYTES; PERFORMANCE;

D O I：

10.1016/j.nanoen.2023.108416

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Garnet-based Li6.5La3Zr1.5Ta0.5O12 (LLZTO) is a prospective solid-state electrolyte with fast ionic mobility and distinguished chemical/electrochemical stabilities toward Li metal. However, Li dendrite propagated within LLZTO bulk is one of the main obstacles to the practical application of solid-state batteries. Herein, we propose to inhibit Li dendrite growth through in-situ construction of a multifunctional interlayer of Li2S/LiSn alloy achieved via a conversion reaction of SnS layer coated on the surface of the LLZTO pellet. DFT calculation reveals that the interfacial contact of LLZTO and Li is considerably improved via Li2S/LiSn interlayer, consequently contributing to a low interfacial impendence (5.1 omega cm2). Furthermore, the electronic insulativity of LLZTO is also meliorated to suppress electron tunneling. As a result, with effectively restraining the Li dendrite, the Li|LLZTO@Li2S/LiSn| Li symmetrical battery exhibits a superb long-term Li plating/stripping performance over 1500 h and 700 h under 0.2 and 0.4 mA cm-2, respectively. Furthermore, the LFP|LLZTO@Li2S/LiSn|Li full battery displays notable cycling performance (99.8% capacity retention after 100 cycles at 1 C) and rate properties (160.6 mAh g-1 at 0.1 C and 116.3 mAh g-1 at 1 C). This facile and effective method may provide a feasible strategy for eliminating the interfacial issue and achieving dendrite-free solid-state Li metal batteries.

引用

页数：9

共 42 条

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