Issue

Vol. 15 (2023)

Rational Design of High-Performance PEO/Ceramic Composite Solid Electrolytes for Lithium Metal Batteries

https://doi.org/10.1007/s40820-023-01055-z
Yanxia Su
State Key Laboratory of Solidification Processing, Centre for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Shaanxi Joint Laboratory of Graphene (NPU), Xi’an 710072, People’s Republic of China
Fei Xu
State Key Laboratory of Solidification Processing, Centre for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Shaanxi Joint Laboratory of Graphene (NPU), Xi’an 710072, People’s Republic of China
Xinren Zhang
State Key Laboratory of Solidification Processing, Centre for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Shaanxi Joint Laboratory of Graphene (NPU), Xi’an 710072, People’s Republic of China
Yuqian Qiu
State Key Laboratory of Solidification Processing, Centre for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Shaanxi Joint Laboratory of Graphene (NPU), Xi’an 710072, People’s Republic of China
Hongqiang Wang
State Key Laboratory of Solidification Processing, Centre for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Shaanxi Joint Laboratory of Graphene (NPU), Xi’an 710072, People’s Republic of China

Corresponding Author: Hongqiang Wang

hongqiang.wang@nwpu.edu.cn

Nano-Micro Letters, Vol. 15 (2023), Article Number: 82

Abstract

Composite solid electrolytes (CSEs) with poly(ethylene oxide) (PEO) have become fairly prevalent for fabricating high-performance solid-state lithium metal batteries due to their high Li+ solvating capability, flexible processability and low cost. However, unsatisfactory room-temperature ionic conductivity, weak interfacial compatibility and uncontrollable Li dendrite growth seriously hinder their progress. Enormous efforts have been devoted to combining PEO with ceramics either as fillers or major matrix with the rational design of two-phase architecture, spatial distribution and content, which is anticipated to hold the key to increasing ionic conductivity and resolving interfacial compatibility within CSEs and between CSEs/electrodes. Unfortunately, a comprehensive review exclusively discussing the design, preparation and application of PEO/ceramic-based CSEs is largely lacking, in spite of tremendous reviews dealing with a broad spectrum of polymers and ceramics. Consequently, this review targets recent advances in PEO/ceramic-based CSEs, starting with a brief introduction, followed by their ionic conduction mechanism, preparation methods, and then an emphasis on resolving ionic conductivity and interfacial compatibility. Afterward, their applications in solid-state lithium metal batteries with transition metal oxides and sulfur cathodes are summarized. Finally, a summary and outlook on existing challenges and future research directions are proposed.


Highlights:


1 The design, preparation and application of poly(ethylene oxide) (PEO)/ceramic composite solid electrolytes (CSEs) are summarized from “ceramic in polymer” and “polymer in ceramic”.
2 The summary and outlook on existing challenges and future research directions of PEO/ceramic CSEs for lithium metal batteries are proposed.

Keywords

Composite solid electrolytes Ionic conductivity Interfacial compatibility Ion conduction pathways Li metal batteries
Su, Yanxia, Fei Xu, Xinren Zhang, Yuqian Qiu, and Hongqiang Wang. 2023. “Rational Design of High-Performance PEO/Ceramic Composite Solid Electrolytes for Lithium Metal Batteries”. Nano-Micro Letters 15 (March):82. https://doi.org/10.1007/s40820-023-01055-z.
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