Enabling Multi-Chemisorption Sites on Carbon Nanofibers Cathodes by an In-situ Exfoliation Strategy for High-Performance Zn-Ion Hybrid Capacitors.

ABSTRACT: Carbon nanofibers films are typical flexible electrode in the field of energy storage, but their application in Zinc-ion hybrid capacitors (ZIHCs) is limited by the low energy density due to the lack of active adsorption sites. In this work, an in-situ exfoliation strategy is reported to modulate the chemisorption sites of carbon nanofibers by high pyridine/pyrrole nitrogen doping and carbonyl functionalization. The experimental results and theoretical calculations indicate that the highly electronegative pyridine/pyrrole nitrogen dopants can not only greatly reduce the binding energy between carbonyl group and Zn²⁺ by inducing charge delocalization of the carbonyl group, but also promote the adsorption of Zn²⁺ by bonding with the carbonyl group to form N-Zn-O bond. B

SUBMITTER: He H 

PROVIDER: S-EPMC9012804 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature