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Synergistic engineering of fluorine doping and oxygen vacancies towards high-energy and long-lifespan flexible solid-state asymmetric supercapacitor.
- Source :
- Ionics; Jun2021, Vol. 27 Issue 6, p2649-2658, 10p
- Publication Year :
- 2021
-
Abstract
- The low electron conductivity and scarce electrochemically active sites impede the practical application of bimetal oxides for supercapacitors. Herein, fluorine-doped and oxygen vacancy–enrich NiMoO<subscript>4</subscript> (F-NiMoO<subscript>4-x</subscript>) nanosheet arrays are constructed via facile hydrothermal and wet chemical reduction processes on carbon cloth fibers (CFC). The structural and electronic properties in F-NiMoO<subscript>4-x</subscript> can be modulated by the synergistic effect of dopant F and O vacancies to boost the electrical conductivity and enhance Faradaic redox sites. The obtained flexible F-NiMoO<subscript>4-x</subscript>@CFC as a self-supporting electrode can provide superior areal capacitance of 2.45 F cm<superscript>−2</superscript> at 1 mA cm<superscript>−2</superscript>, 6-fold higher than that of pristine NiMoO<subscript>4</subscript>@CFC electrode. Moreover, the assembled flexible solid-state asymmetric supercapacitor (ASC) delivers an impressive energy density of 336.5 μWh cm<superscript>−2</superscript> at a power density of 1790 μW cm<superscript>−2</superscript> with a wide voltage window of 1.8 V. Moreover, the ASC can work at different bending angels with an ultralong and stable lifespan. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09477047
- Volume :
- 27
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Ionics
- Publication Type :
- Academic Journal
- Accession number :
- 150452607
- Full Text :
- https://doi.org/10.1007/s11581-021-04034-9