Metal ion and organic ligand disubstituted bimetallic metal-organic framework nanosheets for high-performance alkaline zinc-based batteries

Herein, a disubstitution strategy of metal ions and organic ligands is employed to synthesize metal-organic framework (MOF) nanosheets with a three-dimensional (3D) porous structure and a highly active metal-sulfur (M-S, M = Co and Ni) region. The obtained MOFs//Zn batteries exhibit excellent electrochemical properties and the electrochemical reaction mechanism was elucidated through a series of ex situ characterizations. Pristine MOF nanosheets with a highly active metal-sulfur (M-S, M = Co and Ni) region as cathodes for Zn-Co/Ni batteries are successfully prepared through a dual substitution strategy of metal ions and organic ligands.