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Research on performance enhancement of polymer-based composite solid-state
electrolyte for lithium metal batteries via multiscale synergy

Authors： ZHANG Zhenyi, GUO Jingying, ZHANG Yi, CHEN Lin, XIA Lei, DONG Pengcheng, WANG Jianchuan, WEI Zidong

Units： State Key Laboratory of Advanced Chemical Power Sources, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China

KeyWords： lithium metal batteries； polymer electrolytes； electrospinning； in situ polymerization

ClassificationCode：TQ028； TM911； O63

year,volume(issue):pagination： 2026,46(2):131-142

Abstract：

Polymer electrolytes hold great promise for enabling the commercialization of lithium metal batteries due to their favorable mechanical properties and processability. However, their generally low room-temperature ionic conductivity remains a critical challenge for practical operation. This study proposed a multiscale structural design strategy to construct a polymer-based composite solid-state electrolyte with rigidity-flexibility dual features. The electrolyte incorporated an electrospun polymer/ceramic composite fiber mat as a rigid framework, within which a fluorinated cross-linked polymer network was formed via in situ polymerization. This polymer matrix was further integrated with solid-state plasticizers and a trace amount of interfacial modifier. This design synergistically enhanced the mechanical properties, ionic conductivity, and electrode/electrolyte interfacial stability of the electrolyte. Electrochemical tests demonstrated that cells assembled with this electrolyte exhibited exceptional cycling stability and high capacity retention. This work provides a new pathway for developing electrolyte systems toward high-safety, high-energy-density lithium metal batteries.

Funds：

国家自然科学基金（22478043, 22478044）

AuthorIntro：

张振益(2001-)，男，江西鹰潭人，博士研究生,主要研究方向为锂金属电池聚合物基固态电解质；郭晶莹(1997-)，女，四川渠县人，硕士,主要研究方向为锂金属电池聚合物基固态电解质

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