Issue

Vol. 17 (2025)

Advancements and Challenges in Organic–Inorganic Composite Solid Electrolytes for All-Solid-State Lithium Batteries

https://doi.org/10.1007/s40820-024-01498-y
Xueyan Zhang
State Key Laboratory of Space Power‑Sources, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
Shichao Cheng
State Key Laboratory of Space Power‑Sources, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
Chuankai Fu
State Key Laboratory of Space Power‑Sources, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
Geping Yin
State Key Laboratory of Space Power‑Sources, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China
Liguang Wang
College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, People’s Republic of China
Yongmin Wu
State Key Laboratory of Space Power-Sources, 2965 Dongchuan Road, Minhang District, Shanghai 200240, People’s Republic of China
Hua Huo
State Key Laboratory of Space Power‑Sources, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, People’s Republic of China

Corresponding Author: Hua Huo

huohua@hit.edu.cn

Nano-Micro Letters, Vol. 17 (2025), Article Number: 2

Abstract

To address the limitations of contemporary lithium-ion batteries, particularly their low energy density and safety concerns, all-solid-state lithium batteries equipped with solid-state electrolytes have been identified as an up-and-coming alternative. Among the various SEs, organic–inorganic composite solid electrolytes (OICSEs) that combine the advantages of both polymer and inorganic materials demonstrate promising potential for large-scale applications. However, OICSEs still face many challenges in practical applications, such as low ionic conductivity and poor interfacial stability, which severely limit their applications. This review provides a comprehensive overview of recent research advancements in OICSEs. Specifically, the influence of inorganic fillers on the main functional parameters of OICSEs, including ionic conductivity, Li+ transfer number, mechanical strength, electrochemical stability, electronic conductivity, and thermal stability are systematically discussed. The lithium-ion conduction mechanism of OICSE is thoroughly analyzed and concluded from the microscopic perspective. Besides, the classic inorganic filler types, including both inert and active fillers, are categorized with special emphasis on the relationship between inorganic filler structure design and the electrochemical performance of OICSEs. Finally, the advanced characterization techniques relevant to OICSEs are summarized, and the challenges and perspectives on the future development of OICSEs are also highlighted for constructing superior ASSLBs.


Highlights:
1 The lithium-ion conduction mechanism of organic-inorganic composite solid electrolytes (OICSEs) is thoroughly conducted and concluded from the microscopic perspective based on filler content, type, and system.
2 The classic inorganic filler types, including inert and active fillers, are categorized with special emphasis on the relationship between inorganic filler structure design and the electrochemical performance of OICSEs.
3 Advanced characterization techniques for OICSEs are discussed, and the challenges and prospects for developing superior all-solid-state lithium batteries are highlighted.

Keywords

Composite solid electrolytes Inorganic filler Interfacial stability Li-ion conduction mechanism Characterization techniques
Zhang, Xueyan, Shichao Cheng, Chuankai Fu, Geping Yin, Liguang Wang, Yongmin Wu, and Hua Huo. 2024. “Advancements and Challenges in Organic–Inorganic Composite Solid Electrolytes for All-Solid-State Lithium Batteries”. Nano-Micro Letters 17 (September):2. https://doi.org/10.1007/s40820-024-01498-y.
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