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Issue 35, 2015
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Structural evolution, magnetic properties and electrochemical response of MnCo2O4 nanosheet films

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Abstract

MnCo2O4 spinel oxide nanosheets were prepared via electrodeposition and post thermal annealing on stainless steel substrates. The structural transformation of an electrodeposited hydroxide phase into a spinel phase was achieved by thermal annealing at different temperatures (250 °C, 350 °C, 450 °C and 650 °C). The surface morphology of the films revealed the presence of a nanosheet percolation network that was converted into nanoplatelets after annealing at 650 °C. The nanosheets are composed of nanocrystals and the crystal size of the MnCo2O4 spinel oxide increased from 10 nm after 250 °C annealing to 100 nm after 650 °C annealing, in which a twinning was observed. The magnetic transition temperature also increased from 101 K to 176 K for the films annealed at 250 °C and 650 °C, respectively. The spinel films displayed specific capacitance values above 400 Fg−1 at 1 Ag−1, making these spinel oxides promising pseudocapacitive materials.

Graphical abstract: Structural evolution, magnetic properties and electrochemical response of MnCo2O4 nanosheet films

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Publication details

The article was received on 17 Feb 2015, accepted on 10 Mar 2015 and first published on 18 Mar 2015


Article type: Paper
DOI: 10.1039/C5RA03047A
Citation: RSC Adv., 2015,5, 27844-27852
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    Structural evolution, magnetic properties and electrochemical response of MnCo2O4 nanosheet films

    T. Nguyen, M. Boudard, L. Rapenne, O. Chaix-Pluchery, M. J. Carmezim and M. F. Montemor, RSC Adv., 2015, 5, 27844
    DOI: 10.1039/C5RA03047A

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