Multifunctional Interface for High-Rate and Long-Durable Garnet-Type Solid Electrolyte in Lithium Metal Batteries,ACS Energy Letters

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Multifunctional Interface for High-Rate and Long-Durable Garnet-Type Solid Electrolyte in Lithium Metal Batteries
ACS Energy Letters ( IF 19.3 ) Pub Date : 2021-12-23 , DOI: 10.1021/acsenergylett.1c02332
Kyeongsu Lee _{1,

2} , Sangwook Han ₁ , Jeongmin Lee ₂ , Sunyoung Lee ₁ , Jongmin Kim ₂ , Youngmin Ko ₁ , Sewon Kim _{1,

3} , Kyungho Yoon ₁ , Jun-Hyuk Song ₁ , Joo Hyeon Noh ₁ , Kisuk Kang _{1,

4,

5,

6}

Affiliation

Lithium dendrite growth in solid electrolytes is one of the major obstacles to the commercialization of solid-state batteries based on garnet-type solid electrolytes. Herein, we propose a strategy that can simultaneously resolve both the interface and electronic conductivity issues via a simple one-step procedure that provides multilayer protection at low temperature. We take advantage of the facile chemical conversion reaction, showing the wet-coated SnF₂ particles on the solid electrolyte effectively produces a multifunctional interface composed of LiF and Li–Sn alloy upon contact with lithium. We demonstrate the multifunctional interface enables the remarkably high critical current density up to 2.4 mA cm^–2 at 25 °C and the stable galvanostatic cycling for over 1000 h at 0.5 mA cm^–2 in the lithium symmetric cell. Moreover, the full cell delivers a robust cycle life of more than 600 cycles at 1.0 mA cm^–2, which is the highest performance at room temperature reported to date.

中文翻译：

用于锂金属电池中高倍率和长寿命石榴石型固体电解质的多功能接口

固体电解质中锂枝晶的生长是基于石榴石型固体电解质的固态电池商业化的主要障碍之一。在这里，我们提出了一种策略，可以通过一个简单的一步程序同时解决界面和电子导电性问题，该程序在低温下提供多层保护。我们利用了简单的化学转化反应，表明固体电解质上的湿包覆 SnF ₂颗粒在与锂接触时有效地产生了由 LiF 和 Li-Sn 合金组成的多功能界面。我们展示了多功能接口能够在 25 °C 下实现高达 2.4 mA cm ^–2的极高临界电流密度，并在 0.5 mA cm 下实现超过 1000 小时的稳定恒电流循环^–2在锂对称电池中。^{此外，全电池在 1.0 mA cm –2}下可提供超过 600 次循环的稳健循环寿命，这是迄今为止报告的室温下的最高性能。

更新日期：2022-01-14

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