Synergistic engineering of fluorine doping and oxygen vacancies towards high-energy and long-lifespan flexible solid-state asymmetric supercapacitor

Shuang Zhu; Jiayi Le; Yujie Mao; Shixia Chen; Xinxin Han; Zheling Zeng; Jun Wang; Shuguang Deng

doi:10.1007/s11581-021-04034-9

Synergistic engineering of fluorine doping and oxygen vacancies towards high-energy and long-lifespan flexible solid-state asymmetric supercapacitor

Shuang Zhu, Jiayi Le, Yujie Mao, Shixia Chen, Xinxin Han, Zheling Zeng, Jun Wang, Shuguang Deng

Engineering of Matter, Transport and Energy, School for (IAFSE-SEMTE)

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

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 NiMoO₄ (F-NiMoO_4-x) 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_4-x 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_4-x@CFC as a self-supporting electrode can provide superior areal capacitance of 2.45 F cm⁻² at 1 mA cm⁻², 6-fold higher than that of pristine NiMoO₄@CFC electrode. Moreover, the assembled flexible solid-state asymmetric supercapacitor (ASC) delivers an impressive energy density of 336.5 μWh cm⁻² at a power density of 1790 μW cm⁻² with a wide voltage window of 1.8 V. Moreover, the ASC can work at different bending angels with an ultralong and stable lifespan.

Original language	English (US)
Pages (from-to)	2649-2658
Number of pages	10
Journal	Ionics
Volume	27
Issue number	6
DOIs	https://doi.org/10.1007/s11581-021-04034-9
State	Published - Jun 2021

Keywords

Dopant fluorine
Flexible
NiMoO
Oxygen vacancy
Solid-state

ASJC Scopus subject areas

General Chemical Engineering
General Materials Science
General Engineering
General Physics and Astronomy

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10.1007/s11581-021-04034-9

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title = "Synergistic engineering of fluorine doping and oxygen vacancies towards high-energy and long-lifespan flexible solid-state asymmetric supercapacitor",

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 NiMoO4 (F-NiMoO4-x) nanosheet arrays are constructed via facile hydrothermal and wet chemical reduction processes on carbon cloth fibers (CFC). The structural and electronic properties in F-NiMoO4-x 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-NiMoO4-x@CFC as a self-supporting electrode can provide superior areal capacitance of 2.45 F cm−2 at 1 mA cm−2, 6-fold higher than that of pristine NiMoO4@CFC electrode. Moreover, the assembled flexible solid-state asymmetric supercapacitor (ASC) delivers an impressive energy density of 336.5 μWh cm−2 at a power density of 1790 μW cm−2 with a wide voltage window of 1.8 V. Moreover, the ASC can work at different bending angels with an ultralong and stable lifespan.",

keywords = "Dopant fluorine, Flexible, NiMoO, Oxygen vacancy, Solid-state",

author = "Shuang Zhu and Jiayi Le and Yujie Mao and Shixia Chen and Xinxin Han and Zheling Zeng and Jun Wang and Shuguang Deng",

note = "Funding Information: This research work was supported by the National Natural Science Foundation of China (No. 22008101) and the Natural Science Foundation of Jiangxi Province (No. 20202BAB203010). Publisher Copyright: {\textcopyright} 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.",

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T1 - Synergistic engineering of fluorine doping and oxygen vacancies towards high-energy and long-lifespan flexible solid-state asymmetric supercapacitor

AU - Zhu, Shuang

AU - Le, Jiayi

AU - Mao, Yujie

AU - Chen, Shixia

AU - Han, Xinxin

AU - Zeng, Zheling

AU - Wang, Jun

AU - Deng, Shuguang

N1 - Funding Information: This research work was supported by the National Natural Science Foundation of China (No. 22008101) and the Natural Science Foundation of Jiangxi Province (No. 20202BAB203010). Publisher Copyright: © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

PY - 2021/6

Y1 - 2021/6

N2 - 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 NiMoO4 (F-NiMoO4-x) nanosheet arrays are constructed via facile hydrothermal and wet chemical reduction processes on carbon cloth fibers (CFC). The structural and electronic properties in F-NiMoO4-x 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-NiMoO4-x@CFC as a self-supporting electrode can provide superior areal capacitance of 2.45 F cm−2 at 1 mA cm−2, 6-fold higher than that of pristine NiMoO4@CFC electrode. Moreover, the assembled flexible solid-state asymmetric supercapacitor (ASC) delivers an impressive energy density of 336.5 μWh cm−2 at a power density of 1790 μW cm−2 with a wide voltage window of 1.8 V. Moreover, the ASC can work at different bending angels with an ultralong and stable lifespan.

AB - 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 NiMoO4 (F-NiMoO4-x) nanosheet arrays are constructed via facile hydrothermal and wet chemical reduction processes on carbon cloth fibers (CFC). The structural and electronic properties in F-NiMoO4-x 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-NiMoO4-x@CFC as a self-supporting electrode can provide superior areal capacitance of 2.45 F cm−2 at 1 mA cm−2, 6-fold higher than that of pristine NiMoO4@CFC electrode. Moreover, the assembled flexible solid-state asymmetric supercapacitor (ASC) delivers an impressive energy density of 336.5 μWh cm−2 at a power density of 1790 μW cm−2 with a wide voltage window of 1.8 V. Moreover, the ASC can work at different bending angels with an ultralong and stable lifespan.

KW - Dopant fluorine

KW - Flexible

KW - NiMoO

KW - Oxygen vacancy

KW - Solid-state

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Synergistic engineering of fluorine doping and oxygen vacancies towards high-energy and long-lifespan flexible solid-state asymmetric supercapacitor

Abstract

Keywords

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