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Porous-sheet-assembled Ni(OH)2/NiS arrays with vertical in-plane edge structure for supercapacitor with high stability

Abstract

Hierarchical arrays of transition metal compounds directly grown on a current collector to fabricate the binder-free electrode are a promising strategy to achieve high-performance hybrid supercapacitors owing to its high surface area and low inner resistance. To engineer the microstructure of the hierarchical structure can further efficiently improve capacitive performance. In this work, a hierarchically structured Ni(OH)2/NiS nano-sheet arrays, with the vertical growth of secondary nanosheets on their surface, are directly fabricated onto carbon cloth via an NH4F-induced method. Due to adequate exposed-edge planes available on the surface, the Ni(OH)2/NiS exhibits remarkable electrocapacitive properties with a high specific capacity of 668 μAh cm-2 at 2 mA cm-2 in 3 M KOH medium, as well as excellent cycling performance (97% capacitance retention after 10000 cycles). Besides, the Ni(OH)2/NiS electrode also delivers excellent performance as the flexible and lightweight electrode in a solid-state flexible supercapacitor.

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Publication details

The article was received on 14 Sep 2019, accepted on 27 Oct 2019 and first published on 30 Oct 2019


Article type: Paper
DOI: 10.1039/C9DT03675J
Dalton Trans., 2019, Accepted Manuscript

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    Porous-sheet-assembled Ni(OH)2/NiS arrays with vertical in-plane edge structure for supercapacitor with high stability

    L. Zhang, H. Wang, S. Ji, X. Wang and W. rongfang, Dalton Trans., 2019, Accepted Manuscript , DOI: 10.1039/C9DT03675J

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