US 11,658,324 B2
Redox flow battery and method for operating a redox flow battery
Robert Fleck, Adelsdorf (DE); Barbara Schricker, Erlangen (DE); Jochen Friedl, Newcastle Upon Tyne (GB); Holger Wolfschmidt, Erlangen (DE); Matthäa Holland-Cunz, Newcastle Upon Tyne (GB); and Ulrich Stimming, Newcastle Upon Tyne (GB)
Assigned to LITRICITY GMBH, Oberaudorf (DE)
Appl. No. 16/633,815
Filed by Siemens Aktiengesellschaft, Munich (DE)
PCT Filed Jul. 9, 2018, PCT No. PCT/EP2018/068481
§ 371(c)(1), (2) Date Jan. 24, 2020,
PCT Pub. No. WO2019/020351, PCT Pub. Date Jan. 31, 2019.
Claims priority of application No. 17275118 (EP), filed on Jul. 28, 2017.
Prior Publication US 2021/0126273 A1, Apr. 29, 2021
Int. Cl. H01M 8/18 (2006.01)
CPC H01M 8/188 (2013.01) [H01M 8/18 (2013.01); Y02E 60/50 (2013.01)] 11 Claims
OG exemplary drawing
1. A method for operating an electrically rechargeable redox flow battery, the method comprising:
using a redox flow battery having a first chamber and a second chamber separated by a membrane, wherein the first chamber comprises a cathode and the second chamber comprises an anode;
conducting a first electrolyte as catholyte into the first chamber and conducting a second electrolyte as anolyte into the second chamber;
wherein the first electrolyte comprises a first reduction-oxidation pair and the second electrolyte comprises a second reduction-oxidation pair; and
the first electrolyte comprises a first pH-stabilizing buffer for chemically stabilizing the reduction-oxidation pair, the first buffer including glycine and sodium chloride;
the second electrolyte comprises a second pH-stabilizing buffer with at least one combination selected from the group consisting of: hydrochloric acid and potassium hydrogen phthalate, citric acid and sodium citrate, acetic acid and sodium acetate; and sodium hydroxide and sodium hydrogen phthalate; and
charging or discharging the redox flow battery.