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Issue 6, 2019
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Energy storage inspired by nature – ionic liquid iron–sulfur clusters as electrolytes for redox flow batteries

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Abstract

The redox flow battery (RFB) is a promising technology for the storage of electric energy. Many commercial RFBs are often based on acidic vanadium electrolyte solutions that have limitations regarding stability and energy density. Here, a new approach is presented that is inspired by nature's electron storage, i.e. iron–sulfur clusters [Fe4S4(SR)4]2−. In combination with imidazolium cations, new ionic liquid electrolyte materials were obtained and characterized with regard to their physico- and electrochemical properties. For flow battery tests, the bromide/bromine redox-couple was used in the second half cell in an ionic liquid solution. In these measurements, liquid iron–sulfur clusters show high coulombic (>95%) and energy (69%) efficiencies combined with a high theoretical energy density (88 W h L−1).

Graphical abstract: Energy storage inspired by nature – ionic liquid iron–sulfur clusters as electrolytes for redox flow batteries

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Publication details

The article was received on 18 Sep 2018, accepted on 20 Dec 2018 and first published on 20 Dec 2018


Article type: Communication
DOI: 10.1039/C8DT03776K
Citation: Dalton Trans., 2019,48, 1941-1946
  • Open access: Creative Commons BY-NC license
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    Energy storage inspired by nature – ionic liquid iron–sulfur clusters as electrolytes for redox flow batteries

    C. Modrzynski and P. Burger, Dalton Trans., 2019, 48, 1941
    DOI: 10.1039/C8DT03776K

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