能源化学(英文版)

能源化学(英文版) ›› 2020, Vol. 49 ›› Issue (10): 174-178.DOI: 10.1016/j.jechem.2020.02.015

• • 上一篇    下一篇

A laser synthesis of vanadium oxide bonded graphene for high-rate supercapacitors

Jun Tanga,b, Linfei Zhangb, Xiongwei Zhongb, Xinghui Wangc, Feng Pana, Baomin Xub   

  1. a School of Advanced Materials,Peking University Shenzhen Graduate School,Peking University,Shenzhen 518055,Guangdong,China;
    b Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,Guangdong,China;
    c Institute of Micro/Nano Devices and Solar Cells,School of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,Fujian,China
  • 收稿日期:2019-12-27 修回日期:2020-02-03 出版日期:2020-10-15 发布日期:2020-12-18
  • 通讯作者: Feng Pan, Baomin Xu
  • 基金资助:
    This work is supported by the Fundamental Research(Discipline Arrangement)Project funding from Shenzhen Science and Technology Innovation Committee(Grant no.JCYJ20170412154554048),the Peacock Team Project funding from Shenzhen Science and Technology Innovation Committee(Grant no.KQTD2015033110182370),and the National Key Research and Development Project funding from the Ministry of Science and Technology of China(Grants nos.2016YFA0202400 and 2016YFA0202404),the Shenzhen Maker Project for Students(Grant no.GRCK2017042410565958),the Guangdong Innovation Team Project(no.2013N080),and the Shenzhen Peacock Plan(Grant no.KYPT20141016105435850).

A laser synthesis of vanadium oxide bonded graphene for high-rate supercapacitors

Jun Tanga,b, Linfei Zhangb, Xiongwei Zhongb, Xinghui Wangc, Feng Pana, Baomin Xub   

  1. a School of Advanced Materials,Peking University Shenzhen Graduate School,Peking University,Shenzhen 518055,Guangdong,China;
    b Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,Guangdong,China;
    c Institute of Micro/Nano Devices and Solar Cells,School of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,Fujian,China
  • Received:2019-12-27 Revised:2020-02-03 Online:2020-10-15 Published:2020-12-18
  • Contact: Feng Pan, Baomin Xu
  • Supported by:
    This work is supported by the Fundamental Research(Discipline Arrangement)Project funding from Shenzhen Science and Technology Innovation Committee(Grant no.JCYJ20170412154554048),the Peacock Team Project funding from Shenzhen Science and Technology Innovation Committee(Grant no.KQTD2015033110182370),and the National Key Research and Development Project funding from the Ministry of Science and Technology of China(Grants nos.2016YFA0202400 and 2016YFA0202404),the Shenzhen Maker Project for Students(Grant no.GRCK2017042410565958),the Guangdong Innovation Team Project(no.2013N080),and the Shenzhen Peacock Plan(Grant no.KYPT20141016105435850).

摘要： Graphene is a type of promising electrode material for high-energy and high-power density supercapacitors,but its electrochemical performance is greatly limited by the restacking problem.In this work,we reported a facile approach to synthesis graphene with chemically bonded vanadium oxide (VOx) nanoparticles and demonstrated that chemically-bonded VOx nanoparticles can effectively prevent the graphene sheets from restacking and hence improve the electrochemical performance.The capacitance of VOx-bonded graphene increases to 272 F/g compared to 183 F/g of pristine graphene in 1 M H3PO4 aqueous electrolyte at 2 A/g.The VOx-bonded graphene also showed improved rate capability in both H3PO4 and ionic liquid electrolytes.The capacitance retention increases to 54.5% from 28.5% at 100 A/g (compare to 2 A/g) in H3PO4 and increases to 65.1% from 46.3% at 2 A/g (compare to 0.2 A/g) in neat ionic liquid.A high energy density of 84.4 Wh/kg is obtained within the voltage window of 4 V in ionic liquid.Even at a high-power density of 1000 W/kg,the VOx-bonded graphene shows a high energy density of 47.3 Wh/kg.

关键词: Supercapacitors, Restacking, Vanadium oxides, Laser reduced graphene, High rate

Abstract: Graphene is a type of promising electrode material for high-energy and high-power density supercapacitors,but its electrochemical performance is greatly limited by the restacking problem.In this work,we reported a facile approach to synthesis graphene with chemically bonded vanadium oxide (VOx) nanoparticles and demonstrated that chemically-bonded VOx nanoparticles can effectively prevent the graphene sheets from restacking and hence improve the electrochemical performance.The capacitance of VOx-bonded graphene increases to 272 F/g compared to 183 F/g of pristine graphene in 1 M H3PO4 aqueous electrolyte at 2 A/g.The VOx-bonded graphene also showed improved rate capability in both H3PO4 and ionic liquid electrolytes.The capacitance retention increases to 54.5% from 28.5% at 100 A/g (compare to 2 A/g) in H3PO4 and increases to 65.1% from 46.3% at 2 A/g (compare to 0.2 A/g) in neat ionic liquid.A high energy density of 84.4 Wh/kg is obtained within the voltage window of 4 V in ionic liquid.Even at a high-power density of 1000 W/kg,the VOx-bonded graphene shows a high energy density of 47.3 Wh/kg.

Key words: Supercapacitors, Restacking, Vanadium oxides, Laser reduced graphene, High rate