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Article Navigation >  Green Energy&Environment  > 2019  >  4(4): 382-390
Xiaolan Deng, Yuqi Jiang, Zengxi Wei, Minglei Mao, Ramyakrishna Pothu, Hongxia Wang, Caiyun Wang, Jinping Liu, Jianmin Ma. Flexible quasi-solid-state dual-ion asymmetric supercapacitor based on Ni(OH)2 and Nb2O5 nanosheet arrays. Green Energy&Environment, 2019, 4(4): 382-390. doi: 10.1016/j.gee.2019.02.001
Citation: Xiaolan Deng, Yuqi Jiang, Zengxi Wei, Minglei Mao, Ramyakrishna Pothu, Hongxia Wang, Caiyun Wang, Jinping Liu, Jianmin Ma. Flexible quasi-solid-state dual-ion asymmetric supercapacitor based on Ni(OH)2 and Nb2O5 nanosheet arrays. Green Energy&Environment, 2019, 4(4): 382-390. doi: 10.1016/j.gee.2019.02.001
shu

Flexible quasi-solid-state dual-ion asymmetric supercapacitor based on Ni(OH)2 and Nb2O5 nanosheet arrays

doi: 10.1016/j.gee.2019.02.001
  • a.

    School of Physics and Electronics, Hunan University, Changsha, 410082, China

  • b.

    School of Chemistry Chemical Engineering and Life Science, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China

  • c.

    School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4001, Australia

  • d.

    ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM, Innovation Campus, University of Wollongong, North Wollongong, NSW, Australia

  • e.

    Key Laboratory of Materials Processing and Mold (Zhengzhou University), Ministry of Education, Zhengzhou University, Zhengzhou, 450002, China

More Information
  • Corresponding author: E-mail address: liujp@whut.edu.cn (Jinping Liu); E-mail address: nanoelechem@hnu.edu.cn (Jianmin Ma)
  • Received date 26 December 2018, Accepted date 13 February 2019, RevRecd date 21 January 2019, Available online 20 February 2019, Publish date 31 October 2019,
    Abstract
  • Increasing the energy density, power density as well as widening the operation voltage are essential to electrochemical capacitors to meet the practical energy demands. Herein, a novel flexible quasi-solid-state dual-ion asymmetric supercapacitor (ASC) with Ni(OH)2 and Nb2O5 nanosheets directly grown on stainless steel mesh is developed. In the dual-ion ASC, Nb2O5 negative and Ni(OH)2 positive electrodes react with Li+ and OH− respectively in alkaline gel electrolyte to store energy, which is quite different from conventional alkali metal ion SCs and alkaline SCs. The as-assembled flexible device has an extended working voltage of 1.7 V and delivers a capacity of 5.37 mAh cm−2, a maximum energy density and power density of 0.52 mWh cm−3 and 170 mW cm−3, respectively. The device maintains around 60% capacity retention after long cycling up to 1000 cycles. Moreover, our device can light up a LED light efficiently upon fast charging. The proposed quasi-solid-state dual-ion ASC has potential applications in future portable electronics and flexible energy storage devices.

     

    • X. Deng and Y. Jiang contribute equally to this manuscript.
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