Multi-layered electrolytes for solid-state lithium batteries
Yilin Hu,
Wei Li,
Jianxun Zhu,
Shu-Meng Hao,
Xuan Qin,
Li-Zhen Fan,
Liqun Zhang,
Weidong Zhou
Affiliations
Yilin Hu
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
Wei Li
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
Jianxun Zhu
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
Shu-Meng Hao
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
Xuan Qin
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China; Engineering Research Center of Elastomer Materials on Energy Conservation and Resources, Beijing University of Chemical Technology, Beijing 100029, China; Corresponding authors at: State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
Li-Zhen Fan
Beijing Advanced Innovation Center for Materials Genome Engineering, Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China; Corresponding authors.
Liqun Zhang
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China; Engineering Research Center of Elastomer Materials on Energy Conservation and Resources, Beijing University of Chemical Technology, Beijing 100029, China; Institute of Emergent Elastomers, School of Materials Science and Engineering, South China University of Technology, Guangdong 510640, China; Corresponding authors at: State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
Weidong Zhou
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China; Corresponding authors.
Solid-state lithium batteries are promising candidates for improving battery safety and boosting energy density. However, the application of both typical solid-state electrolytes, inorganic ceramic/glass and organic polymer electrolytes, are facing their respective inherent challenges, including large interfacial resistance and unwanted interfacial reactions of inorganic electrolytes, and narrow electrochemical stability windows of polymer electrolytes. The design of multi-layer solid-state electrolytes, such as inorganic/inorganic, inorganic/polymer and polymer/polymer structures, provides a viable solution to these issues by effectively improving the interfacial stability and widening the electrochemical window, which exhibits unparallel advantages in solid-state batteries with the help of non-diffusible characteristic of solid-state electrolytes. Given the extensive research and progress reported, this paper reviews the latest advancements in multi-layer solid-state electrolytes and categorizes them into inorganic-based, polymer-based and composite-based systems. Each is discussed separately, focusing on their design rationales, functional mechanisms, electrochemical performances, and residual challenges. In addition, to meet the requirements of practical applications, the potential strategies for further development of multi-layer solid-state electrolytes are also briefly presented.
