Rigid-Flexible Coupling Realized by Synergistic Engineering of the Graphitic-Amorphous Architecture for Durable and Fast Potassium Storage.

ABSTRACT: Graphite anodes hold great potential for potassium-ion batteries (PIBs), yet their practical application is hindered by poor cycle performance caused by substantial interlayer expansion. Herein, a partial graphitic carbon (PGC) is elaborately engineered via the catalytic effect of ferric citrate using pitch as a carbon precursor. Systematically varying the catalyst content enables an optimal PGC design integrating a highly graphitized phase providing abundant active sites for K-ion intercalation, balanced with an amorphous carbon region that accommodates volume expansion and facilitates ion diffusion. The optimized PGC12 electrode exhibits a high reversible capacity of 281.9 mAh g^-1, characterized by a prolonged low-potential plateau region, and excellent cycle stability with a

SUBMITTER: Jiang M 

PROVIDER: S-EPMC11744585 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature