Issue 26, 2022

Room-temperature all-solid-state lithium metal batteries based on ultrathin polymeric electrolytes

Abstract

Flexible all solid-state batteries that combine polymer electrolytes and lithium metal are required for powering wearable electronic devices as they embody high flexibility, safety and energy density. However, it has been challenging to develop room temperature flexible solid-state batteries because of the low ionic conductivities of polymeric ion conductors. Here, we report a highly conductive polymer electrolyte based on lowly viscous polyethylene oxide ion conductors confined inside an ultrastrong and ultrathin nanofibrous polyethylene membrane. The newly developed solid polymer electrolyte exhibits high room temperature charge transfer conductance (0.07 S) and excellent compatibility with Li metal (cycling time > 3500 hours at 0.1 mA cm−2) at 30 °C. Large-scale molecular dynamics simulations show that the high ionic conductivity is because of the enhanced segmental mobility of confined PEO inside the nanomembrane and the strong charge–dipole interactions between the PEO and lithium ions. This work provides a viable solution toward room temperature workable solid-state batteries that meet the requirements for wearable electronic devices.

Graphical abstract: Room-temperature all-solid-state lithium metal batteries based on ultrathin polymeric electrolytes

Supplementary files

Article information

Article type
Paper
Submitted
15 Mar 2022
Accepted
07 Jun 2022
First published
08 Jun 2022

J. Mater. Chem. A, 2022,10, 13969-13977

Room-temperature all-solid-state lithium metal batteries based on ultrathin polymeric electrolytes

J. Feng, J. Wang, Q. Gu, W. Thitisomboon, D. Yao, Y. Deng and P. Gao, J. Mater. Chem. A, 2022, 10, 13969 DOI: 10.1039/D2TA02023H

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