Hybrid electrochemical capacitors in aqueous electrolytes: Challenges and prospects

Horst Schranger, Farshad Barzegar, Qamar Abbas*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review


In an internal hybrid capacitor, at least one electrode displays battery-like charge/discharge and the other electrode stores charge reversibly at the electric double-layer (EDL). Recently, a plethora of hybrid cells in aqueous electrolytes have been proposed by coupling an EDL electrode with a battery electrode, the latter made from a variety of redox-active/redox-mediator species either dissolved in the electrolyte or adsorbed/immobilized in nanoporous electrodes. This review presents current opinions, discusses challenges, and supplies recommendation about the hybrid cells with aqueous electrolytes and carbon electrodes.
Original languageEnglish
Pages (from-to)167-174
Number of pages8
JournalCurrent Opinion in Electrochemistry
Publication statusPublished - Jun 2020


  • Hybrid capacitor
  • Electrochemical capacitor
  • Battery electrode
  • Aqueous electrolyte
  • Activated carbon
  • Electric double layer
  • Carbon material
  • Battery-like electrode
  • Hybrid electrochemical capacitor

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

Fields of Expertise

  • Advanced Materials Science

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