Dual Confinement of CoSe₂ Nanorods with Polyphosphazene-Derived Heteroatom-Doped Carbon and Reduced Graphene Oxide for Potassium-Ion Batteries.

ABSTRACT: High-capacity and highly stable anode materials are some of the keys to the realization of the application of potassium-ion batteries (PIBs). Cobalt diselenide (CoSe₂) has been regarded as a high-potential anode material for PIBs. However, solving the problems of sluggish kinetics and large volumetric expansion during intercalation/deintercalation of K⁺ ions is always very challenging in terms of cobalt diselenide-based anode materials. Herein, reduced graphene oxide-encapsulated polyphosphazene-derived S, P, and N codoped carbon (SPNC)-coated CoSe₂ nanorods (CoSe₂⊂SPNC⊂rGO) were designed as PIB anode materials. CoSe₂⊂SPNC⊂rGO delivers an excellent reversible capacity of 287.2 mAh g^-1 at 100 mA g^-1. Benefiting fro

SUBMITTER: Zhao Z 

PROVIDER: S-EPMC8264929 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature