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Issue 20, 2017
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Heteroelement Y-doped α-Ni(OH)2 nanosheets with excellent pseudocapacitive performance

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Abstract

Doping is an efficient method to promote the electronic conductivity and improve the capacitive performance of electrodes for further energy conversion. Herein, by doping heteroelement metal ions, an ultrathin Y (yttrium)-doped α-Ni(OH)2 nanosheet electrode with a large surface area and hierarchical porous structure is fabricated via a facile approach. The Y-doped α-Ni(OH)2 nanosheets exhibit a high specific capacitance of 1860 F g−1 at a current density of 1 A g−1 mainly due to the increased electronic conductivity of the increased Ni3+ species, as evidenced by density functional theory calculations. As a result, the asymmetric supercapacitor device based on the Y-doped α-Ni(OH)2 nanosheet electrode demonstrates both a remarkably high energy density (58.4 W h kg−1) and power density (754.56 W kg−1).

Graphical abstract: Heteroelement Y-doped α-Ni(OH)2 nanosheets with excellent pseudocapacitive performance

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Publication details

The article was received on 30 Jan 2017, accepted on 19 Apr 2017 and first published on 26 Apr 2017


Article type: Paper
DOI: 10.1039/C7TA00963A
Citation: J. Mater. Chem. A, 2017,5, 10039-10047
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    Heteroelement Y-doped α-Ni(OH)2 nanosheets with excellent pseudocapacitive performance

    Y. Zhang, Y. Zhao, W. An, L. Xing, Y. Gao and J. Liu, J. Mater. Chem. A, 2017, 5, 10039
    DOI: 10.1039/C7TA00963A

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