Carbonyls Mediated Dual-Function Enables High-Performance Carbon Anodes in Ester-based Electrolyte.

ABSTRACT: Constructing an "ether solid electrolyte interphase (SEI)"-like layer in ester electrolyte is highly attractive to realize excellent capacity and cycling stability for hard carbon anode, but has barely been mentioned yet. Herein, the hard carbon grafted by caffeic acid is developed via a surface reconstruction strategy, in which rich C═O moieties are introduced. Varied characterizations reveal that the existing C═O exhibits stronger adsorption energy on salt (PF₆ ^-) than solvent (e.g., EC and DEC), thus accelerating salt decomposition to produce a stable inorganic SEI layer. Besides, C═O moieties can also adsorb K-ions reversibly, accounting for a high capacitive contribution. Benefiting from the double merits of C═O moieties, the interfacial stability and surface pro

SUBMITTER: Wu Z 

PROVIDER: S-EPMC12442670 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature