Research progress of gel polymer electrolytes for lithium batteries

Abstract

Due to their exceptional electrochemical properties, lithium-based rechargeable batteries have been the industry leaders in the energy storage field and have attracted substantial research attention. Electrolytes play an irreplaceable role in lithium batteries. Gel polymer electrolytes (GPEs) not only hold the potential to ameliorate the risks associated with liquid electrolytes and solid electrolytes but also show further applications as additives, activators, and membranes, enhancing the properties of many electrochemical systems. Moreover, their processibility and flexibility make them a promising application on wearable and biomedical devices. This article first briefly introduces the basic structure and working principle of lithium batteries. After that, the characteristics of several lithium-based batteries, including LSB, LMB, LIBs, and LOB, were compiled. Finally, this paper emphasizes several traditional gel polymer electrolytes for lithium batteries, including PAN-based GPE, PEO-based GPE, PMMA-based GPE, and PVDF-based GPE. The critical role they play in enhancing the performance and safety of lithium battery systems was illustrated by presenting the most recent research advancements.