Zinc-Catalyzed Two-Electron Nickel(IV/II) Redox Couple for Multi-Electron Storage in Redox Flow Batteries

  • Md. Motiur R. Mazumder (11286474)
  • Niharika Dalpati (14159975)
  • P. Raj Pokkuluri (621128)
  • Byron H. Farnum (1413082)
Publication date
November 2022
Publisher
American Chemical Society (ACS)

Abstract

Energy storage is a vital aspect for the successful implementation of renewable energy resources on a global scale. Herein, we investigated the redox cycle of nickel(II) bis(diethyldithiocarbamate), NiII(dtc)2, for potential use as a multielectron storage catholyte in nonaqueous redox flow batteries (RFBs). Previous studies have shown that the unique redox cycle of NiII(dtc)2 offers 2e– chemistry upon oxidation from NiII → NiIV but 1e– chemistry upon reduction from NiIV → NiIII → NiII. Electrochemical experiments presented here show that the addition of as little as 10 mol % ZnII(ClO4)2 to the electrolyte consolidates the two 1e– reduction peaks into a single 2e– reduction where [NiIV(dtc)3]+ is reduced directly to NiII(dtc)2. This catalyti...

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