An aqueous 2.1 V pseudocapacitor with MXene and V-MnO2 electrodes

Jiabin Wu; Qun Li; Christopher E. Shuck; Kathleen Maleski; Husam N. Alshareef; Jun Zhou; Yury Gogotsi; Liang Huang

doi:10.1007/s12274-021-3513-x

An aqueous 2.1 V pseudocapacitor with MXene and V-MnO2 electrodes

Jiabin Wu, Qun Li, Christopher E. Shuck, Kathleen Maleski, Husam N. Alshareef, Jun Zhou, Yury Gogotsi, Liang Huang

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

43 Scopus citations

Abstract

MXenes have shown record-breaking redox capacitance in aqueous electrolytes, but in a limited voltage window due to oxidation under anodic potential and hydrogen evolution under high cathodic potential. Coupling Ti3C2Tx MXene negative electrode with RuO2 or carbon-based positive electrodes expanded the voltage window in sulfuric acid electrolyte to about 1.5 V. Here, we present an asymmetric pseudocapacitor using abundant and eco-friendly vanadium doped MnO2 as the positive and Ti3C2Tx MXene as the negative electrode in a neutral 1 M Li2SO4 electrolyte. This all-pseudocapacitive asymmetric device not only uses a safer electrolyte and is a much less expensive counter-electrode than RuO2, but also can operate within a 2.1 V voltage window, leading to a maximum energy density of 46 Wh/kg. This study also demonstrates the possibility of using MXene electrodes to expand the working voltage window of traditional redox-capable materials.[Figure not available: see fulltext.]

Original language	English (US)
Journal	Nano Research
DOIs	https://doi.org/10.1007/s12274-021-3513-x
State	Published - May 26 2021

Bibliographical note

KAUST Repository Item: Exported on 2021-06-08
Acknowledged KAUST grant number(s): OSR-CRG2016-2963
Acknowledgements: This work was financially supported by the National Natural Science Foundation of China (Nos. 51972124, 51902115, and 51872101). Research reported in this publication was also supported by King Abdullah University of Science and Technology (KAUST) under the KAUST-Drexel Competitive Research Grant (No. OSR-CRG2016-2963 sub 11206). The authors express their gratitude to late Prof. J. Zhou for valuable discussions. The authors thank to the facility support of the Center for Nanoscale Characterization & Devices, WNLO-HUST and the Analysis and Testing Center, HUST.

ASJC Scopus subject areas

General Materials Science
Electrical and Electronic Engineering

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10.1007/s12274-021-3513-x

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title = "An aqueous 2.1 V pseudocapacitor with MXene and V-MnO2 electrodes",

abstract = "MXenes have shown record-breaking redox capacitance in aqueous electrolytes, but in a limited voltage window due to oxidation under anodic potential and hydrogen evolution under high cathodic potential. Coupling Ti3C2Tx MXene negative electrode with RuO2 or carbon-based positive electrodes expanded the voltage window in sulfuric acid electrolyte to about 1.5 V. Here, we present an asymmetric pseudocapacitor using abundant and eco-friendly vanadium doped MnO2 as the positive and Ti3C2Tx MXene as the negative electrode in a neutral 1 M Li2SO4 electrolyte. This all-pseudocapacitive asymmetric device not only uses a safer electrolyte and is a much less expensive counter-electrode than RuO2, but also can operate within a 2.1 V voltage window, leading to a maximum energy density of 46 Wh/kg. This study also demonstrates the possibility of using MXene electrodes to expand the working voltage window of traditional redox-capable materials.[Figure not available: see fulltext.]",

author = "Jiabin Wu and Qun Li and Shuck, {Christopher E.} and Kathleen Maleski and Alshareef, {Husam N.} and Jun Zhou and Yury Gogotsi and Liang Huang",

note = "KAUST Repository Item: Exported on 2021-06-08 Acknowledged KAUST grant number(s): OSR-CRG2016-2963 Acknowledgements: This work was financially supported by the National Natural Science Foundation of China (Nos. 51972124, 51902115, and 51872101). Research reported in this publication was also supported by King Abdullah University of Science and Technology (KAUST) under the KAUST-Drexel Competitive Research Grant (No. OSR-CRG2016-2963 sub 11206). The authors express their gratitude to late Prof. J. Zhou for valuable discussions. The authors thank to the facility support of the Center for Nanoscale Characterization & Devices, WNLO-HUST and the Analysis and Testing Center, HUST.",

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AU - Wu, Jiabin

AU - Li, Qun

AU - Shuck, Christopher E.

AU - Maleski, Kathleen

AU - Alshareef, Husam N.

AU - Zhou, Jun

AU - Gogotsi, Yury

AU - Huang, Liang

N1 - KAUST Repository Item: Exported on 2021-06-08 Acknowledged KAUST grant number(s): OSR-CRG2016-2963 Acknowledgements: This work was financially supported by the National Natural Science Foundation of China (Nos. 51972124, 51902115, and 51872101). Research reported in this publication was also supported by King Abdullah University of Science and Technology (KAUST) under the KAUST-Drexel Competitive Research Grant (No. OSR-CRG2016-2963 sub 11206). The authors express their gratitude to late Prof. J. Zhou for valuable discussions. The authors thank to the facility support of the Center for Nanoscale Characterization & Devices, WNLO-HUST and the Analysis and Testing Center, HUST.

PY - 2021/5/26

Y1 - 2021/5/26

N2 - MXenes have shown record-breaking redox capacitance in aqueous electrolytes, but in a limited voltage window due to oxidation under anodic potential and hydrogen evolution under high cathodic potential. Coupling Ti3C2Tx MXene negative electrode with RuO2 or carbon-based positive electrodes expanded the voltage window in sulfuric acid electrolyte to about 1.5 V. Here, we present an asymmetric pseudocapacitor using abundant and eco-friendly vanadium doped MnO2 as the positive and Ti3C2Tx MXene as the negative electrode in a neutral 1 M Li2SO4 electrolyte. This all-pseudocapacitive asymmetric device not only uses a safer electrolyte and is a much less expensive counter-electrode than RuO2, but also can operate within a 2.1 V voltage window, leading to a maximum energy density of 46 Wh/kg. This study also demonstrates the possibility of using MXene electrodes to expand the working voltage window of traditional redox-capable materials.[Figure not available: see fulltext.]

AB - MXenes have shown record-breaking redox capacitance in aqueous electrolytes, but in a limited voltage window due to oxidation under anodic potential and hydrogen evolution under high cathodic potential. Coupling Ti3C2Tx MXene negative electrode with RuO2 or carbon-based positive electrodes expanded the voltage window in sulfuric acid electrolyte to about 1.5 V. Here, we present an asymmetric pseudocapacitor using abundant and eco-friendly vanadium doped MnO2 as the positive and Ti3C2Tx MXene as the negative electrode in a neutral 1 M Li2SO4 electrolyte. This all-pseudocapacitive asymmetric device not only uses a safer electrolyte and is a much less expensive counter-electrode than RuO2, but also can operate within a 2.1 V voltage window, leading to a maximum energy density of 46 Wh/kg. This study also demonstrates the possibility of using MXene electrodes to expand the working voltage window of traditional redox-capable materials.[Figure not available: see fulltext.]

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UR - https://link.springer.com/10.1007/s12274-021-3513-x

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JF - Nano Research

ER -

An aqueous 2.1 V pseudocapacitor with MXene and V-MnO2 electrodes

Abstract

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