Robust Electrodes for Flexible Energy Storage Devices Based on Bimetallic Encapsulated Core–Multishell Structures

Advanced Science, Vol. 8 (2021)

Keywords
Authors
  • Yan‐Fei Li
  • College of Chemistry National & Local United Engineering Laboratory for Power Batteries Northeast Normal University 5268, Renmin Street Changchun 130024 P. R. China
  • Shuyang Ye
  • Department of Chemistry University of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada
  • Yan‐Hong Shi
  • College of Chemistry National & Local United Engineering Laboratory for Power Batteries Northeast Normal University 5268, Renmin Street Changchun 130024 P. R. China
  • Jian Lin
  • College of Chemistry National & Local United Engineering Laboratory for Power Batteries Northeast Normal University 5268, Renmin Street Changchun 130024 P. R. China
  • Yi‐Han Song
  • College of Chemistry National & Local United Engineering Laboratory for Power Batteries Northeast Normal University 5268, Renmin Street Changchun 130024 P. R. China
  • Yang Su
  • College of Chemistry National & Local United Engineering Laboratory for Power Batteries Northeast Normal University 5268, Renmin Street Changchun 130024 P. R. China
  • Xing‐Long Wu
  • College of Chemistry National & Local United Engineering Laboratory for Power Batteries Northeast Normal University 5268, Renmin Street Changchun 130024 P. R. China
  • Jing‐Ping Zhang
  • College of Chemistry National & Local United Engineering Laboratory for Power Batteries Northeast Normal University 5268, Renmin Street Changchun 130024 P. R. China
  • Hai‐Ming Xie
  • College of Chemistry National & Local United Engineering Laboratory for Power Batteries Northeast Normal University 5268, Renmin Street Changchun 130024 P. R. China
  • Zhong‐Min Su
  • College of Chemistry National & Local United Engineering Laboratory for Power Batteries Northeast Normal University 5268, Renmin Street Changchun 130024 P. R. China
  • Hai‐Zhu Sun
  • College of Chemistry National & Local United Engineering Laboratory for Power Batteries Northeast Normal University 5268, Renmin Street Changchun 130024 P. R. China
  • Dwight S. Seferos
  • Department of Chemistry University of Toronto 80 St. George Street Toronto Ontario M5S 3H6 Canada

Abstract

Abstract Developing flexible electrodes with high active materials loading and excellent mechanical stability is of importance to flexible electronics, yet remains challenging. Herein, robust flexible electrodes with an encapsulated core‐multishell structure are developed via a spraying‐hydrothermal process. The multilayer electrode possesses an architecture of substrate/reduced graphene oxide (rGO)/bimetallic complex/rGO/bimetallic complex/rGO from the inside to the outside, where the cellulosic fibers serve as the substrate, namely, the core; and the multiple layers of rGO and bimetallic complex, are used as active materials, namely, the shells. The inner two rGO interlayers function as the cement that chemically bind to two adjacent layers, while the two outer rGO layers encapsulate the inside structure effectively protecting the electrode from materials detachment or electrolyte corrosion. The electrodes with a unique core‐multishell structure exhibit excellent cycle stability and exceptional temperature tolerance (−25 to 40 °C) for lithium and sodium storage. A combination of experimental and theoretical investigations are carried out to gain insights into the synergetic effects of cobalt‐molybdenum‐sulfide (CMS) materials (the bimetallic complex), which will provide guidance for future exploration of bimetallic sulfides. This strategy is further demonstrated in other substrates, showing general applicability and great potential in the development of flexible energy storage devices.

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