Construction of unique NiCo2O4 nanowire@CoMoO4 nanoplate core/shell arrays on Ni foam for high areal capacitance supercapacitors

Daoping Cai; Bin Liu; Dandan Wang; Lingling Wang; Yuan Liu; Han Li; Yanrong Wang; Qiuhong Li; Taihong Wang

doi:10.1039/C3TA14351A

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Construction of unique NiCo₂O₄ nanowire@CoMoO₄ nanoplate core/shell arrays on Ni foam for high areal capacitance supercapacitors†

Daoping Cai,^a Bin Liu,^a Dandan Wang,^a Lingling Wang,^a Yuan Liu,^a Han Li,^a Yanrong Wang,^a Qiuhong Li^a and Taihong Wang*^a

Author affiliations

* Corresponding authors

^a Pen–Tung Sah Institute of Micro–Nano Science and Technology, Xiamen University, Xiamen 361000, P.R. China
E-mail: thwang@xmu.edu.cn

Abstract

In this work, we present a facile two-step hydrothermal method with a successive annealing treatment to integrate two ternary metal oxides (NiCo₂O₄ and CoMoO₄) into unique core/shell nanowire arrays (NWAs) on Ni foam as advanced binder-free electrodes for the first time. In addition, a possible growth mechanism for the growth of CoMoO₄ nanoplates (NPs) on NiCo₂O₄ nanowires (NWs) is put forward based on the time-dependent experiments. When investigated as binder-free electrodes for supercapacitors (SCs), such unique NiCo₂O₄@CoMoO₄ core/shell hybrid electrodes exhibit ultrahigh areal capacitances, which are several times larger than the pristine NiCo₂O₄ electrode. The remarkable electrochemical performance is attributed to the rational combination of two electroactive materials and the reasonable array configuration.

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Article information

DOI: https://doi.org/10.1039/C3TA14351A
Article type: Paper
Submitted: 25 Oct 2013
Accepted: 24 Dec 2013
First published: 06 Jan 2014

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J. Mater. Chem. A, 2014,2, 4954-4960

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Construction of unique NiCo₂O₄ nanowire@CoMoO₄ nanoplate core/shell arrays on Ni foam for high areal capacitance supercapacitors

D. Cai, B. Liu, D. Wang, L. Wang, Y. Liu, H. Li, Y. Wang, Q. Li and T. Wang, J. Mater. Chem. A, 2014, 2, 4954 DOI: 10.1039/C3TA14351A

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Journal of Materials Chemistry A