A gel polymer electrolyte with multiple hydrogen bonding for pressure-free Ah silicon-based pouch cells.

ABSTRACT: Silicon stands out as promising negative electrode for future lithium-ion batteries owing to its high specific capacity. However, drastic volume change during cycling results in significant loss of electronic/ionic conduction and poor cycling life, necessitating external stack pressure to confine volume expansion. In this work, we develop a gel polymer electrolyte by in situ co-polymerizing methyl methacrylate and 2-(3-(6-methyl-4-oxo-1,4-dihydropyrimidin-2-yl)ureido)ethyl methacrylate to enable pressure-free and energy-dense silicon-based lithium-ion batteries. Benefiting from the crosslinked polymer structure and self-healing property, the SiO_x particles experience limited volume expansion and maintain robust interfacial contact with the gel electrolyte, leading to a capacity

SUBMITTER: Liu F 

PROVIDER: S-EPMC12753644 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature