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Facile scalable production of amorphous nickel borate for high performance hybrid supercapacitors

Abstract

Research attentions have been paid on transition metal borates, especially nickel borate, for their potential applications in energy conversion and storage. Here, for the first time, amorphous nickel borate nanosheets were synthesized via a facile scalable co-precipitation method in room temperature and the hybrid supercapacitors were fabricated based on the synthesized amorphous nickel borate nanosheets. A high specific capacitance of 993.4 F g-1 can be achieved in three electrodes configurations. By assembled into the asymmetry hybrid supercapacitor with active carbon as counter electrode, the device shows a high energy density of 42.4 Wh kg-1 at a power density of 800 W kg-1. Even after 10000 charge-discharges cycling at a high current density of 10 A g-1, the device still maintained over 97 % specific capacitance. These outstanding electrochemical performances can be attributed to the large surface area and inherent abundant defects that allowing full contact between the electrode materials and electrolyte. These findings pave the way to explore other transition metals borate and amorphous materials for high performance supercapacitors electrode.

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Publication details

The article was received on 31 Jul 2018, accepted on 12 Sep 2018 and first published on 15 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA07385F
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Facile scalable production of amorphous nickel borate for high performance hybrid supercapacitors

    W. Qin, Y. Liu, G. Yang and X.Y. Liu, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA07385F

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