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Research Article | Open Access

Ionic liquid-mediated PEO-based solid-state electrolyte membrane modified with Dawson-type polyoxometalates

Qianqian Liu§, Yunzuo Cui§, Lijie Zhu§, Dongming Cheng, Chen Wang, Siqi Lu, Bo Li, Xinyu Chen, Hong-Ying Zang ( )
Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education at Universities of Jilin Province, Faculty of Chemistry, Northeast Normal University, Changchun 130024, China

Qian-Qian Liu, Yunzuo Cui, and Li-Jie Zhu contributed equally to this work.

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Abstract

All-solid-state batteries are promising candidates for the future generation of energy storage materials. An ideal solid-state electrolyte should have the advantages of excellent compatibility with electrodes and decent ionic conductivity. Nevertheless, the inherent low ionic conductivity of polyethylene oxide (PEO)-based electrolytes leads to low capacity, which significantly limits their wide commercial application. In this study, Dawson-type Li6P2Mo18O62 (LPM) or Li6P2W18O62 (LPW) was selected as lithium salt, combined with ionic liquids (ILs) with ether oxygen chains, and incorporated into a polymer matrix blended with PEO and polyvinylidene fluoride as fillers. A polymer electrolyte film with a smooth surface and uniform filler distribution was prepared using a mechanical co-blending method. The challenge of polyoxometalates as ion-conducting materials is attributed to the strong binding ability of their anion clusters to cations. One prominent benefit of this study is that the dissociation of Li+ from LPM or LPW is facilitated by ILs and relies on the ether oxygen chains in ILs for transport, yielding composites with favorable conduction properties. This study demonstrates the vast potential of polyoxometalates in the field of ionic conductivity.

Keywords

polyoxometalatesionic liquidsion conductionsolid-state electrolyte

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Polyoxometalates
Volume 2 Issue 3,
September 2023
Pages 9140036-9140036
DOI: 10.26599/POM.2023.9140036
Cite this article:
Liu Q, Cui Y, Zhu L, et al. Ionic liquid-mediated PEO-based solid-state electrolyte membrane modified with Dawson-type polyoxometalates. Polyoxometalates, 2023, 2(3): 9140036. https://doi.org/10.26599/POM.2023.9140036

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Received: 29 May 2023
Revised: 16 August 2023
Accepted: 16 September 2023
Published: 28 September 2023
© The Author(s) 2023. Polyoxometalates published by Tsinghua University Press.

The articles published in this open access journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
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