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

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep14117· OSTI ID:1226404
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  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)

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.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1226404
Report Number(s):
PNNL-SA-104406; srep14117
Journal Information:
Scientific Reports, Vol. 5; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 52 works
Citation information provided by
Web of Science

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Cited By (8)

MetILs 3 : A Strategy for High Density Energy Storage Using Redox-Active Ionic Liquids journal July 2017
A pH‐Neutral, Metal‐Free Aqueous Organic Redox Flow Battery Employing an Ammonium Anthraquinone Anolyte journal September 2019
A pH‐Neutral, Metal‐Free Aqueous Organic Redox Flow Battery Employing an Ammonium Anthraquinone Anolyte journal November 2019
Toward High‐Voltage, Energy‐Dense, and Durable Aqueous Organic Redox Flow Batteries: Role of the Supporting Electrolytes journal September 2018
High current density, long duration cycling of soluble organic active species for non-aqueous redox flow batteries journal January 2016
Molecular engineering of organic electroactive materials for redox flow batteries journal January 2018
Progress and directions in low-cost redox-flow batteries for large-scale energy storage journal January 2017
Mixed-Component Catholyte and Anolyte Solutions for High-Energy Density Non-Aqueous Redox Flow Batteries journal January 2018