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RGO-loaded double phase Mo-doped NiS for enhanced battery-type energy storage in hybrid supercapacitors
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DOI：10.1016/j.electacta.2022.140810.png)
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Abstract
En 中文
The Mo-doped NiS/rGO composite was obtained by vulcanization of NiMoO4 and morphology adjustment by GO. A nanosheet-like structure was demonstrated in the composite, which was assembled by double-phase Mo-doped NiS (Mo-NiS) nanodots loading on reduced graphene oxide (rGO) nanosheets. The doping of Mo and the resultant synergistic effect between Mo and Ni can offer the bimetallic sulfide of Mo-NiS with higher capacity output and enhanced cycle stability. The surface oxygen-containing functional groups of GO provide abundant nucleation centers for the uniform loading of Mo-NiS nanodot during synthesis, and the resultant rGO sheets in the final composite ensures continuous electron transport and promoted ionic exchange for Mo-NiS. Besides, the Mo-NiS nanoparticles loaded on the surface of rGO can also inhibit its stacking and form a highly integrated composite structure. The synergistic effect of Mo-doping, double-phase NiS and conductive rGO substrates attributed to the high specific capacity output (1664.7 C g(-1) at 1 A g(-1)), long cycle life and excellent rate performance in the final composite. The Mo-NiS/rGO composite was also applied as a battery-type electrode in asymmetric super -capacitors (ASCs), which showed acceptable performance for potential practicability, including attractable energy densities and power densities, as well as impressive cyclic ability with large capacity retention of 90.3% in 7000 cycles.
Keywords:
Mo-doping
NiS nanodots
Battery -type electrode
Asymmetric supercapacitor
Journal
IF:
5.6
Papers:
4.0W
Citations:
12.6W
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