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US 12,577,203 B2Granted
Solution of tempo-derivatives for use as electrolyte in redox-flow cells
AssigneeBASF SE
InventorsRainer Klopsch, Peter Oechsle, Harald Winsel, Alexander Michael Haydl, Joaquim Henrique Teles, Johann-Peter Melder, Jan-Dirk Arndt, Olaf Kriha, Alexandre Guthertz
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Abstract
The present invention relates to a solution comprising water and different 2,2,6,6-tetramethyl-piperidinyl-oxyl (TEMPO)-derivatives, a process for the production of this solution, a process for making a redox-flow cell comprising the solution as electrolyte, the redox-flow cell comprising the solution as an electrolyte in one chamber of the cell and the use of the redox-flow cell for storing electrical energy.
Claims12
A solution comprising:
- a) water,
- b) 20 to 55 wt. 2,2,6,6-tetramethyl-4-(trimethylammonio)-1-piperidinyloxy of formula (I),
- c) 0.1 to 6 wt.-% alkali metal cations,
- d) 0.5 to 12.5 wt.-% N,N,N,1,2,2,6,6-octamethyl-4-piperidinammonium-1-oxide of formula (II),
- e) 0.1 to 20 wt.-% 2,2,6,6-hexamethyl-4-(dimethylamino)-1-piperidinyloxy-N-oxide of formula (III).
2 more elements
Dependencies are inferred from the claim text.