Bismuth nanoparticles embedded in a carbon skeleton as an anode for high power density potassium-ion batteries.

ABSTRACT: Bismuth is a promising anode for potassium-ion batteries (PIBs) due to its suitable redox potential, large theoretical capacity, and superior electronic conductivity. Herein, we report a Bi@C (Bi nanoparticles uniformly embedded in a carbon skeleton) composite anode which delivers a superior rate performance of 244.3 mA h g^-1 at 10.0 A g^-1 and a reversible capacity of 255.6 mA h g^-1 after 200 cycles in an optimized ether-based electrolyte. The outstanding electrochemical performance results from its robust structural design with fast reaction kinetics, which are confirmed by both experimental characterization studies and first-principles calculations. The reversible potassium storage mechanism of the Bi@C composite was also investigated by in situ X-

SUBMITTER: Hao Z 

PROVIDER: S-EPMC9533415 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature