Electrochemical performance of CoSe2 with mixed phases decorated with N-doped rGO in potassium-ion batteries† † Electronic supplementary information (ESI) available. See https://doi.org/10.1039/d2ra03608h

ABSTRACT: Potassium-ion batteries (PIBs) have received much attention as next-generation energy storage systems because of their abundance, low cost, and slightly lower standard redox potential than lithium-ion batteries (LIBs). Nevertheless, they still face great challenges in the design of the best electrode materials for applications. Herein, we have successfully synthesized nano-sized CoSe2 encapsulated by N-doped reduced graphene oxide (denoted as CoSe2@N-rGO) by a direct one-step hydrothermal method, including both orthorhombic and cubic CoSe2 phases. The CoSe2@N-rGO anodes exhibit a high reversible capacity of 599.3 mA h g−1 at 0.05 A g−1 in the initial cycle, and in particular, they also exhibit a cycling stability of 421 mA h g−1 after 100 cycles at 0.2 A g−1. Density functional theory (DFT

SUBMITTER: Zheng H 

PROVIDER: S-EPMC9344900 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature