Metal–organic frameworks (MOFs) with porous structures
are
beneficial for electrochemical energy storage. Herein, the in-situ
growth of the S-doped Ni-MOF nanosheet (S-NMN) on the surfaces of
nickel foams was prepared via a facile solvothermal process. Owing
to the rich active sites, small transport barrier, and excellent mechanical
stability, the fabricated S-NMN-2 electrode displays a high specific
capacity (1952 mF cm–2 at 1 mA cm–2), satisfactory rate performance, and remarkable cyclic stability.
For practical application, the assembled S-NMN-2//AC device achieves
a high energy density of 0.189 mWh cm–2 at the power
density of 1.600 mW cm–2 with prominent cycling
stability (93.27% capacity retention after 4000 cycles). The facile
strategy of etching nickel foam demonstrates a new idea for developing
high-performance supercapacitor materials.
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