Abstract
Carbonaceous anode materials have been considered as a competitive candidate for the advanced potassium ion batteries (PIBs) owing to their high conductivity, low cost, relatively high theoretical capacity and stability. However, the poor ion transfer kinetics and undesired discharge capacity always limited their practical application. Herein, we reported the highly porous carbon nanofibers (HP-CNFs) prepared by using a facile electrospinning method for efficient K-storage. Due to its highly porous morphology, enlarged interlayer distance, N-doping, and abundant active sites, HP-CNFs can realize the rapid and reversible insertion/deinsertion of large-size K ions. HP-CNFs display reversible capacity of 311.7 mAh g−1 as an anode of PIBs even after 1000 cycles. This excellent electrochemical performance proves the feasibility of using HP-CNFs as a promising anode material for advanced PIBs.
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