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Valence‐Optimized Vanadium Oxide Supercapacitor Electrodes Exhibit Ultrahigh Capacitance and Super‐Long Cyclic Durability of 100 000 Cycles

Vanadium oxides (VO) have been intensely investigated as cathode materials for SCs due to the multiple stable oxidation states (III–V) of vanadium in its oxides and typical layered structure. Nevertheless, fast capacity fading is always observed for VO upon cycling in aqueous electrolyte. Developing... Full description

Journal Title: Advanced Functional Materials June 2015, Vol.25(23), pp.3534-3540
Main Author: Yu, Minghao
Other Authors: Zeng, Yan , Han, Yi , Cheng, Xinyu , Zhao, Wenxia , Liang, Chaolun , Tong, Yexiang , Tang, Haolin , Lu, Xihong
Format: Electronic Article Electronic Article
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ID: ISSN: 1616-301X ; E-ISSN: 1616-3028 ; DOI: 10.1002/adfm.201501342
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recordid: wj10.1002/adfm.201501342
title: Valence‐Optimized Vanadium Oxide Supercapacitor Electrodes Exhibit Ultrahigh Capacitance and Super‐Long Cyclic Durability of 100 000 Cycles
format: Article
creator:
  • Yu, Minghao
  • Zeng, Yan
  • Han, Yi
  • Cheng, Xinyu
  • Zhao, Wenxia
  • Liang, Chaolun
  • Tong, Yexiang
  • Tang, Haolin
  • Lu, Xihong
subjects:
  • Long Durability
  • Supercapacitors
  • Valence States
  • Vanadium Oxides
ispartof: Advanced Functional Materials, June 2015, Vol.25(23), pp.3534-3540
description: Vanadium oxides (VO) have been intensely investigated as cathode materials for SCs due to the multiple stable oxidation states (III–V) of vanadium in its oxides and typical layered structure. Nevertheless, fast capacity fading is always observed for VO upon cycling in aqueous electrolyte. Developing an efficient strategy to essentially promote the durability of VO in mild aqueous electrolyte remains a crucial challenge. Here, an innovative and effective method is reported to significantly boost the durability and capacitance of VO through tuning the valence state of vanadium. The valence state of vanadium is optimized through a very facile electrochemical oxidation method. A superior electrochemical performance and an ultralong cyclic stability of 100 000 cycles are obtained for these electrodes. An in‐depth study on the variation for the valence state of vanadium during the oxidation process and the cyclic stability test indicates that the long cyclic stability has an important relationship with the distribution of the valence state of vanadium. , an innovative and effective method is reported to significantly boost their durability and capacitance through tuning the valence state of vanadium.
language:
source:
identifier: ISSN: 1616-301X ; E-ISSN: 1616-3028 ; DOI: 10.1002/adfm.201501342
fulltext: fulltext
issn:
  • 1616-301X
  • 1616301X
  • 1616-3028
  • 16163028
url: Link


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titleValence‐Optimized Vanadium Oxide Supercapacitor Electrodes Exhibit Ultrahigh Capacitance and Super‐Long Cyclic Durability of 100 000 Cycles
creatorYu, Minghao ; Zeng, Yan ; Han, Yi ; Cheng, Xinyu ; Zhao, Wenxia ; Liang, Chaolun ; Tong, Yexiang ; Tang, Haolin ; Lu, Xihong
ispartofAdvanced Functional Materials, June 2015, Vol.25(23), pp.3534-3540
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subjectLong Durability ; Supercapacitors ; Valence States ; Vanadium Oxides
descriptionVanadium oxides (VO) have been intensely investigated as cathode materials for SCs due to the multiple stable oxidation states (III–V) of vanadium in its oxides and typical layered structure. Nevertheless, fast capacity fading is always observed for VO upon cycling in aqueous electrolyte. Developing an efficient strategy to essentially promote the durability of VO in mild aqueous electrolyte remains a crucial challenge. Here, an innovative and effective method is reported to significantly boost the durability and capacitance of VO through tuning the valence state of vanadium. The valence state of vanadium is optimized through a very facile electrochemical oxidation method. A superior electrochemical performance and an ultralong cyclic stability of 100 000 cycles are obtained for these electrodes. An in‐depth study on the variation for the valence state of vanadium during the oxidation process and the cyclic stability test indicates that the long cyclic stability has an important relationship with the distribution of the valence state of vanadium. , an innovative and effective method is reported to significantly boost their durability and capacitance through tuning the valence state of vanadium.
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titleValence‐Optimized Vanadium Oxide Supercapacitor Electrodes Exhibit Ultrahigh Capacitance and Super‐Long Cyclic Durability of 100 000 Cycles
descriptionVanadium oxides (VO) have been intensely investigated as cathode materials for SCs due to the multiple stable oxidation states (III–V) of vanadium in its oxides and typical layered structure. Nevertheless, fast capacity fading is always observed for VO upon cycling in aqueous electrolyte. Developing an efficient strategy to essentially promote the durability of VO in mild aqueous electrolyte remains a crucial challenge. Here, an innovative and effective method is reported to significantly boost the durability and capacitance of VO through tuning the valence state of vanadium. The valence state of vanadium is optimized through a very facile electrochemical oxidation method. A superior electrochemical performance and an ultralong cyclic stability of 100 000 cycles are obtained for these electrodes. An in‐depth study on the variation for the valence state of vanadium during the oxidation process and the cyclic stability test indicates that the long cyclic stability has an important relationship with the distribution of the valence state of vanadium. , an innovative and effective method is reported to significantly boost their durability and capacitance through tuning the valence state of vanadium.
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titleValence‐Optimized Vanadium Oxide Supercapacitor Electrodes Exhibit Ultrahigh Capacitance and Super‐Long Cyclic Durability of 100 000 Cycles
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abstractVanadium oxides (VO) have been intensely investigated as cathode materials for SCs due to the multiple stable oxidation states (III–V) of vanadium in its oxides and typical layered structure. Nevertheless, fast capacity fading is always observed for VO upon cycling in aqueous electrolyte. Developing an efficient strategy to essentially promote the durability of VO in mild aqueous electrolyte remains a crucial challenge. Here, an innovative and effective method is reported to significantly boost the durability and capacitance of VO through tuning the valence state of vanadium. The valence state of vanadium is optimized through a very facile electrochemical oxidation method. A superior electrochemical performance and an ultralong cyclic stability of 100 000 cycles are obtained for these electrodes. An in‐depth study on the variation for the valence state of vanadium during the oxidation process and the cyclic stability test indicates that the long cyclic stability has an important relationship with the distribution of the valence state of vanadium. , an innovative and effective method is reported to significantly boost their durability and capacitance through tuning the valence state of vanadium.
doi10.1002/adfm.201501342
pages3534-3540
date2015-06