Controllable synthesis of hollow spherical nickel chalcogenide (NiS₂ and NiSe₂) decorated with graphene for efficient supercapacitor electrodes.

ABSTRACT: New carbon-loaded nickel chalcogenide electrode materials (NiS₂/GO and NiSe₂/rGO) have been synthesized through an easy-to-operate process: NiSe₂ was obtained based on NiS₂ hollow spheres, and was successfully synthesized with l-cysteine assistance under the hydrothermal method at 120 °C. GO of different mass fraction was added together with l-cysteine. The electrochemical performance of NiS₂/GO and NiSe₂/rGO has been greatly improved because the formation of a carbon-loaded layer effectively increased the specific surface area and reduced the charge transport resistance. Compared with pure NiS₂ and NiSe₂, NiS₂/GO and NiSe₂/rGO presented much better specific capacitance (1020 F g

SUBMITTER: Lu M 

PROVIDER: S-EPMC8696559 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature