Battelle Memorial Institute

Soowhan Kim

Liyu Li

Zhenguo Yang

Guanguang Xia

Zimin Nie

Wei Wang

Baowei Chen

Jianlu Zhang

Jun Liu

Gordon Lee Graff

Guan-Guang Xia

Redox flow battery systems having a supporting solution that contains Clions can exhibit improved performance and characteristics. Furthermore, a supporting solution having mixed SOand Clions can provide increased energy density and improved stability and solubility of one or more of the ionic species in the catholyte and/or anolyte. According to one example, a vanadium-based redox flow battery system is characterized by an anolyte having Vand Vin a supporting solution and a catholyte having Vand Vin a supporting solution. The supporting solution can contain Clions or a mixture of SOand Clions.

Redox flow batteries based on supporting solutions containing chloride

Iron-sulfide redox flow battery (RFB) systems can be advantageous for energy storage, particularly when the electrolytes have pH values greater than 6. Such systems can exhibit excellent energy conversion efficiency and stability and can utilize low-cost materials that are relatively safer and more environmentally friendly. One example of an iron-sulfide RFB is characterized by a positive electrolyte that comprises Fe(III) and/or Fe(II) in a positive electrolyte supporting solution, a negative electrolyte that comprises Sand/or S in a negative electrolyte supporting solution, and a membrane, or a separator, that separates the positive electrolyte and electrode from the negative electrolyte and electrode.

Iron-sulfide redox flow batteries

A redox flow battery having a supporting solution that includes Clanions is characterized by an anolyte having Vand Vin the supporting solution, a catholyte having Feand Fein the supporting solution, and a membrane separating the anolyte and the catholyte. The anolyte and catholyte can have V cations and Fe cations, respectively, or the anolyte and catholyte can each contain both V and Fe cations in a mixture. Furthermore, the supporting solution can contain a mixture of SOand Clanions.

Fe-V redox flow batteries

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Soowhan Kim