Chemistry

A corrosion inhibiting layer to tackle the irreversible lithium loss in lithium metal batteries

C. Jin, Y. Huang, et al.

This groundbreaking research by Chengbin Jin and colleagues unveils strategies to combat the notorious corrosion of lithium negative electrodes, potentially enhancing the lifespan of Li metal batteries. By revealing the connection between lithium corrosion and solid-electrolyte interphase (SEI) dynamics, the team developed an innovative anti-corrosion passivation layer that significantly reduces lithium loss in battery systems.

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Abstract

Reactive negative electrodes like lithium (Li) suffer serious chemical and electrochemical corrosion by electrolytes, leading to deteriorated battery lifespan. This study quantitatively monitors Li corrosion and solid-electrolyte-interphase (SEI) progression using electrochemical tools and cryo-electron microscopy. A correlation between continuous Li corrosion and SEI dissolution is established. An anti-corrosion artificial passivation layer of low-solubility polymer and metal fluoride is designed, achieving prolonged operation of Li symmetric and Li||LiFePO4 cells with a 74% reduction in Li corrosion. This success extends to ampere-hour-scale pouch cells, demonstrating a strategy to improve Li metal battery durability by reducing Li loss.

Publisher

Nature Communications

Published On

Dec 13, 2023

Authors

Chengbin Jin, Yiyu Huang, Lanhang Li, Guoying Wei, Hongyan Li, Qiyao Shang, Zhijin Ju, Gongxun Lu, Jiale Zheng, Ouwei Sheng, Xinyong Tao

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