Redox Polymers in Electrochemical Systems: From Methods of Mediation to Energy Storage

Redox polymers for energy storage. (a) Polymer-based redox flow batteries with two electrolyte reservoirs and a size-exclusion membrane for use in an electrochemical cell. TEMPO-redox polymer and viologen redox polymer continuously migrate from the electrolyte reservoir into the electrochemical cell during the charge and discharge processes. (b) Ferrocene-LPEI coupled with glucose oxidase for a hybrid fuel cell/supercapacitor device. LPEI, linear polyethylenimine; TEMPO, 2,2,6,6-Tetramethylpiperidinyloxyl.

Scientific Achievement

Redox polymers were designed for mediation in sensors in the 1980s, but it was not until the last five years that researchers realized that they could play a critical role in energy storage, including redox flow batteries and supercapacitors.

Significance and Impact

This review details the historical progression of redox polymers from glucose sensors to energy storage, including discussion of the advances over the last decade in rationally designing redox polymers for the application of interest.

Research Details

  • Background on the history of redox polymers for sensing applications
  • History of the transition of redox polymers from sensors to energy conversion
  • History of the transition of redox polymers to energy storage
  • Discussion of the different rational design strategies depending on the application (i.e. redox flow battery versus fuel cell versus supercapacitor)

DOI: 10.1016/j.coelec.2019.03.003

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