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Synthesis of NiMoO4@Co3O4 hierarchical nanostructure arrays on reduced graphene oxide/Ni foam as binder-free electrode for asymmetric supercapacitor.
- Source :
- Journal of Materials Science; 2021, Vol. 56 Issue 15, p9419-9433, 15p, 1 Black and White Photograph, 1 Chart, 7 Graphs
- Publication Year :
- 2021
-
Abstract
- Currently, substantial attention has been concentrated on the preparation and practical application of complex hierarchical nanostructure composite, which exhibits excellent electrochemical properties compared to the single-structured materials. Hence, a novel electrode of NiMoO<subscript>4</subscript>@Co<subscript>3</subscript>O<subscript>4</subscript>–5H composite nanoarrays supported on reduced graphene oxide/Ni Foam (rGO/NF) was synthesized through the facile hydrothermal method. The composite combines the advantages of the large specific capacitance of NiMoO<subscript>4</subscript> and the great rate capability of Co<subscript>3</subscript>O<subscript>4</subscript>, exhibiting the distinguished specific capacitance and rate performance. The prepared NiMoO<subscript>4</subscript>@Co<subscript>3</subscript>O<subscript>4</subscript>–5H composite shows an enhanced pseudocapacitive performance of about 1722.3 F g<superscript>−1</superscript> at a current density of 1 A g<superscript>−1</superscript>, and eminent rate capability of 80.8% at 10 A g<superscript>−1</superscript>. Moreover, the composite delivers good long-term cycling stability with capacitance retention of 91% after 6000 cycles. An asymmetric supercapacitor (ASC) was fabricated using NiMoO<subscript>4</subscript>@Co<subscript>3</subscript>O<subscript>4</subscript>–5H and AC as the positive electrode and negative electrode, achieving the high energy density of 37.1 Wh kg<superscript>−1</superscript> at a power density of 798.0 W kg<superscript>−1</superscript>, and exceptional cycling stability (100% retention after 4000 cycles). These consequences suggest that NiMoO<subscript>4</subscript>@Co<subscript>3</subscript>O<subscript>4</subscript>–5H could be considered as a potential electrode material for energy storage devices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00222461
- Volume :
- 56
- Issue :
- 15
- Database :
- Complementary Index
- Journal :
- Journal of Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 149030720
- Full Text :
- https://doi.org/10.1007/s10853-021-05902-5