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Title: Anion-tunable properties and electrochemical performance of functionalized ferrocene compounds

We report a series of ionically modified ferrocene compounds for hybrid lithium-organic non-aqueous redox flow batteries, based on the ferrocene/ferrocenium redox couple as the active catholyte material. Tetraalkylammonium ionic moieties were incorporated into the ferrocene structure, in order to enhance the solubility of the otherwise relatively insoluble ferrocene. The effect of various counter anions of the tetraalkylammonium ionized species appended to the ferrocene, such as bis(trifluoromethanesulfonyl)imide, hexafluorophosphate, perchlorate, tetrafluoroborate, and dicyanamide on the solubility of the ferrocene was investigated. The solution chemistry of the ferrocene species was studied, in order to understand the mechanism of solubility enhancement. Lastly, the electrochemical performance of these ionized ferrocene species was evaluated and shown to have excellent cell efficiency and superior cycling stability.
 [1] ;  [1] ;  [2] ;  [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [1] ;  [1]
  1. Energy and Environment Directorate, Richland, WA (United States)
  2. Fundamental and Computation Science Directorate, Richland, WA (United States)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  4. National Security Directorate, Richland, WA (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 2045-2322; srep14117
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal ID: ISSN 2045-2322
Nature Publishing Group
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Org:
Country of Publication:
United States
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY redox flow; organic hybrid batteries; functionalized ferrocene; ionic liquids; Environmental Molecular Sciences Laboratory; polymer synthesis; supramolecular polymers