Engineering and Technology

A stable quasi-solid electrolyte improves the safe operation of highly efficient lithium-metal pouch cells in harsh environments

Z. Chang, H. Yang, et al.

This groundbreaking research by Zhi Chang, Huijun Yang, Xingyu Zhu, Ping He, and Haoshen Zhou introduces a quasi-solid electrolyte confined within a metal-organic framework, promising higher boiling points, good ionic conductivity, and a safe lithium-metal battery with impressive cycle stability, even at high temperatures.

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Abstract

This work demonstrates a quasi-solid electrolyte (QSE) confined within a 6.5 Å metal-organic framework (MOF), exhibiting enhanced properties compared to typical liquid electrolytes: higher boiling points, aggregated configurations, good ionic conductivity, wide electrochemical stability window (≈5.4 V vs. Li/Li+), and nonflammability. Lithium-metal batteries (LMBs) using this QSE show a CEI-free cathode and dendrite-free Li-metal surface. High-voltage LiNi0.8Co0.1Mn0.1O2//Li (NCM-811//Li) pouch cells with high NCM-811 mass loading (20 mg cm-2) maintain stable performance even at 90 °C (171 mAh g-1 after 300 cycles, 89% retention; 164 mAh g-1 after 100 cycles even after damage). This QSE fabrication strategy shows promise for safe, high-energy-density LIBs/LMBs.

Publisher

Nature Communications

Published On

Mar 21, 2022

Authors

Zhi Chang, Huijun Yang, Xingyu Zhu, Ping He, Haoshen Zhou

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