Ni₃ S₂ -Ni Hybrid Nanospheres with Intra-Core Void Structure Encapsulated in N-Doped Carbon Shells for Efficient and Stable K-ion Storage.

ABSTRACT: Iron group metals chalcogenides, especially NiS, are promising candidates for K-ion battery anodes due to their high theoretical specific capacity and abundant reserves. However, the practical application of NiS-based anodes is hindered by slow electrochemical kinetics and unstable structure. Herein, a novel structure of Ni₃ S₂ -Ni hybrid nanosphere with intra-core voids encapsulated by N-doped carbon shells (Ni₃ S₂ -Ni@NC-AE) is constructed, based on the first electrodeposited NiS nanosphere particles, dopamine coating outer layer, oxygen-free annealing treatment to form Ni₃ S₂ -Ni core and N-doped carbon shell, and selective etching of the Ni phase to form intra-core void. The electron/K⁺ transport and K^+</

SUBMITTER: Yu X 

PROVIDER: S-EPMC9929274 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature