An environment-friendly crosslinked binder endowing LiFePO₄ electrode with structural integrity and long cycle life performance.

ABSTRACT: Lithium iron phosphate (LiFePO₄) is one of the most widely used cathode materials of lithium ion batteries. However, its commercial binder polyvinylidene fluoride (PVDF) is costly, less environmental-friendly and unstable during the long cycling process because of the weak van der Waals forces between the PVDF binder and electrode materials. Herein, an aqueous binder was designed using methacrylate-modified gelatin through UV photo-crosslinking. The crosslinked network and specific functional groups (carboxyl and amino) of the gelatin binder are superior in stabilizing the LiFePO₄ electrode structure during long cycles by mitigating the formation of cracks and suppressing the detachment of electrode materials from the Al current collector. The LiFePO₄ elect

SUBMITTER: Zhao L 

PROVIDER: S-EPMC9055956 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature