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3D walnut-shaped TiO2/RGO/MoO2@Mo electrode with extraordinary supercapacitors performances

Abstract

Rational architectural design is the key of improving the specific capacitance. We presented a facile one-step hydrothermal preparation to fabricate a TiO2/RGO/MoO2 composite with an unprecedented 3D walnut-shaped hierarchical nanostructure, in which amorphous TiO2 was decorated on RGO(reduced graphene oxides)/MoO2 surface via a Mo-involved in-situ growth route on Mo net (TiO2/RGO/MoO2@Mo). This 3D structure coated with ultrafine arched nanorods made a great breakthrough in electrochemical performances of TiO2- or MoO2-based electrodes: an extraordinary areal capacitance of 3927 mF cm-2 at 3 mA cm-2 (i.e. 1636 F g-1 at 1.25 A g-1) and only 3.5% capacitance loss after 5000 cycles. Such excellent performances were benefitted from: (i) Amorphous TiO2 sculptured MoO2 blocky particles so as to supply more active-site accessibility and facilitate the accommodation of volume expansion. (ii) Arched MoO2 nanorods and walnut-shaped sphere provided electron transfer paths. (iii) RGO was a soft scaffold for whole structure.

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Publication details

The article was received on 14 Jun 2017, accepted on 10 Aug 2017 and first published on 10 Aug 2017


Article type: Paper
DOI: 10.1039/C7TA05160C
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    3D walnut-shaped TiO2/RGO/MoO2@Mo electrode with extraordinary supercapacitors performances

    P. Ju, Z. Zhu, X. Shao, S. Wang, C. Zhao, X. Qian and C. Zhao, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA05160C

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