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In-situ preparation of MgCo2O4 nanosheets on Ni-foam as a binder-free electrode for high performance hybrid supercapacitors

Abstract

A binder free, MgCo2O4 nanosheet-like architecture was prepared on Ni-foam using a hydrothermal method. The MgCo2O4/Ni-foam was characterized by X-ray diffraction, field emission scanning electron microscopy (FESEM), and transmission electron microscopy. The FESEM image revealed a nanosheet array-like architecture. The MgCo2O4 nanosheets grown on Ni-foam exhibited the maximum specific capacity of 947 C g-1 at a specific current of 2 A g-1. Approximately 96 % of the specific capacity was retained from maximum specific capacity after 5000 continuous charge-discharge cycles. The hybrid device exhibited a maximum specific capacity of 52 C g-1 at a specific current of 0.5 A g-1. The hybrid device exhibited a maximum specific energy of 12.99 Wh Kg-1 at a specific power of 448.7 W Kg-1. These results confirmed that the binder free, MgCo2O4 nanosheets grown on Ni-foam are a suitable positive electrode material for hybrid supercapacitors.

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Publication details

The article was received on 12 Feb 2018, accepted on 04 Apr 2018 and first published on 05 Apr 2018


Article type: Paper
DOI: 10.1039/C8DT00591E
Citation: Dalton Trans., 2018, Accepted Manuscript
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    In-situ preparation of MgCo2O4 nanosheets on Ni-foam as a binder-free electrode for high performance hybrid supercapacitors

    S. Vijayakumar, S. Nagamuthu and K. Ryu, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT00591E

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