Quasi-Solid Gel Electrolytes for Alkali Metal Battery Applications

• This review explores the application of quasi-solid gel electrolytes (QSGEs) in alkali metal batteries (AMBs), emphasizing self-healing gels, flexible gels, biomimetic gels, and biomass gels. Each of these gel types brings unique advantages to the performance of AMBs. • This review outlines future research directions, including synthesizing advanced QSGEs, in situ characterization techniques, and theoretical simulations to better understand and optimize these materials. It identifies critical areas for investigation, guiding researchers to optimize QSGEs in AMBs and enhance their application. • QSGEs offer a promising strategy to address safety and durability concerns in AMBs, particularly for smart wearable devices, by providing self-healing, flexibility, and environmental friendliness. • The review highlights the need for enhancing ionic conductivity, mechanical strength, and environmental stability of novel gel materials to further improve AMB performance.