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Novel Dealloying-Fabricated NiS/NiO Nanoparticles with Superior Cycling Stability for Supercapacitors.

ABSTRACT: NiS/NiO nanoparticles are successfully fabricated through a simple dealloying method and an ion-exchange process. X-ray diffraction demonstrates the existence of NiO and NiS phases, and scanning electron microscopy and transmission electron microscopy imply the nanopore distribution nature and the nanoparticle morphology of the produced material. The electrochemical behaviors are studied by cyclic voltammetry and galvanostatic charge-discharge measurements. The NiS/NiO electrode shows an enhanced specific capacitance of 1260 F g^-1 at a current density of 0.5 A g^-1. The NiS/NiO//AC device provides a maximum energy density of 17.42 W h kg^-1, a high power density of 4000 W kg^-1, and a satisfactory cycling performance of 93% capacitance retention after 30,000 cycles.

SUBMITTER: Wang H

PROVIDER: S-EPMC8296023 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature

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Novel Dealloying-Fabricated NiS/NiO Nanoparticles with Superior Cycling Stability for Supercapacitors.

Wang Haiyang H Wang Jinlong J Liang Miaomiao M He Zemin Z Li Kexuan K Song Wenqi W Tian Shaopeng S Duan Wenyuan W Zhao Yuzhen Y Miao Zongcheng Z

ACS omega 20210708 28

NiS/NiO nanoparticles are successfully fabricated through a simple dealloying method and an ion-exchange process. X-ray diffraction demonstrates the existence of NiO and NiS phases, and scanning electron microscopy and transmission electron microscopy imply the nanopore distribution nature and the nanoparticle morphology of the produced material. The electrochemical behaviors are studied by cyclic voltammetry and galvanostatic charge-discharge measurements. The NiS/NiO electrode shows an enhance ...[more]

PMID: 34308034

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