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Holey graphene frameworks for highly efficient capacitive energy storage

Author

Listed:
  • Yuxi Xu

    (University of California)

  • Zhaoyang Lin

    (University of California)

  • Xing Zhong

    (University of California)

  • Xiaoqing Huang

    (University of California)

  • Nathan O. Weiss

    (University of California)

  • Yu Huang

    (University of California
    California Nanosystems Institute, University of California)

  • Xiangfeng Duan

    (University of California
    California Nanosystems Institute, University of California)

Abstract

Supercapacitors represent an important strategy for electrochemical energy storage, but are usually limited by relatively low energy density. Here we report a three-dimensional holey graphene framework with a hierarchical porous structure as a high-performance binder-free supercapacitor electrode. With large ion-accessible surface area, efficient electron and ion transport pathways as well as a high packing density, the holey graphene framework electrode can deliver a gravimetric capacitance of 298 F g−1 and a volumetric capacitance of 212 F cm−3 in organic electrolyte. Furthermore, we show that a fully packaged device stack can deliver gravimetric and volumetric energy densities of 35 Wh kg−1 and 49 Wh l−1, respectively, approaching those of lead acid batteries. The achievement of such high energy density bridges the gap between traditional supercapacitors and batteries, and can open up exciting opportunities for mobile power supply in diverse applications.

Suggested Citation

  • Yuxi Xu & Zhaoyang Lin & Xing Zhong & Xiaoqing Huang & Nathan O. Weiss & Yu Huang & Xiangfeng Duan, 2014. "Holey graphene frameworks for highly efficient capacitive energy storage," Nature Communications, Nature, vol. 5(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5554
    DOI: 10.1038/ncomms5554
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    Cited by:

    1. Pandey, Mayank & Deshmukh, Kalim & Raman, Akhila & Asok, Aparna & Appukuttan, Saritha & Suman, G.R., 2024. "Prospects of MXene and graphene for energy storage and conversion," Renewable and Sustainable Energy Reviews, Elsevier, vol. 189(PB).
    2. Dohyeong Seok & Yohan Jeong & Kyoungho Han & Do Young Yoon & Hiesang Sohn, 2019. "Recent Progress of Electrochemical Energy Devices: Metal Oxide–Carbon Nanocomposites as Materials for Next-Generation Chemical Storage for Renewable Energy," Sustainability, MDPI, vol. 11(13), pages 1-34, July.

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