• 文献标题:   Freestanding Gold/Graphene-Oxide/Manganese Oxide Microsupercapacitor Displaying High Areal Energy Density
  • 文献类型:   Article
  • 作  者:   MORAG A, BECKER JY, JELINEK R
  • 作者关键词:   graphene oxide, manganese oxide, microsupercapacitor, porous gold, pseudocapacitance
  • 出版物名称:   CHEMSUSCHEM
  • ISSN:   1864-5631 EI 1864-564X
  • 通讯作者地址:   Ben Gurion Univ Negev
  • 被引频次:   4
  • DOI:   10.1002/cssc.201700500
  • 出版年:   2017

▎ 摘  要

Microsupercapacitors are touted as one of the promising "next frontiers" in energy-storage research and applications. Despite their potential, significant challenges still exist in terms of physical properties and electrochemical performance, particularly attaining high energy density, stability, ease of synthesis, and feasibility of large-scale production. We present new freestanding microporous electrodes comprising self-assembled scaffold of gold and reduced graphene oxide (rGO) nanowires coated with MnO2. The electrodes exhibited excellent electrochemical characteristics, particularly superior high areal capaci-tance. Moreover, the freestanding Au/rGO scaffold also served as the current collector, obviating the need for an additional electrode support required in most reported supercapacitors, thus enabling low volume and weight devices with a high overall device specific energy. Stacked symmetrical solid-state supercapacitors were fabricated using the Au/rGO/MnO2 electrodes in parallel configurations showing the advantage of using freestanding electrodes in the fabrication of low-volume devices.