A reflection on polymer electrolytes for solid-state lithium metal batteries

Ziyu Song, Fangfang Chen (), Maria Martinez-Ibañez, Wenfang Feng, Maria Forsyth, Zhibin Zhou (), Michel Armand () and Heng Zhang ()
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Ziyu Song: Huazhong University of Science and Technology
Fangfang Chen: Deakin University
Maria Martinez-Ibañez: Basque Research and Technology Alliance (BRTA)
Wenfang Feng: Huazhong University of Science and Technology
Maria Forsyth: Deakin University
Zhibin Zhou: Huazhong University of Science and Technology
Michel Armand: Basque Research and Technology Alliance (BRTA)
Heng Zhang: Huazhong University of Science and Technology

Nature Communications, 2023, vol. 14, issue 1, 1-13

Abstract: Abstract Before the debut of lithium-ion batteries (LIBs) in the commodity market, solid-state lithium metal batteries (SSLMBs) were considered promising high-energy electrochemical energy storage systems before being almost abandoned in the late 1980s because of safety concerns. However, after three decades of development, LIB technologies are now approaching their energy content and safety limits imposed by the rocking chair chemistry. These aspects are prompting the revival of research activities in SSLMB technologies at both academic and industrial levels. In this perspective article, we present a personal reflection on solid polymer electrolytes (SPEs), spanning from early development to their implementation in SSLMBs, highlighting key milestones. In particular, we discuss the SPEs’ characteristics taking into account the concept of coupled and decoupled SPEs proposed by C. Austen Angell in the early 1990s. Possible remedies to improve the physicochemical and electrochemical properties of SPEs are also examined. With this article, we also aim to highlight the missing blocks in building ideal SSLMBs and stimulate research towards innovative electrolyte materials for future rechargeable high-energy batteries.

Date: 2023
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DOI: 10.1038/s41467-023-40609-y

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