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US 12,577,204 B2Granted
Solution of tempo-derivatives for use as electrolyte in redox-flow cells
AssigneeBASF SE
InventorsAlexander Michael Haydl, Peter Oechsle, Harald Winsel, Jan-Dirk Arndt, Joaquim Henrique Teles, Johann-Peter Melder, Olaf Kriha, Rainer Klopsch
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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, a 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.
Claims18
A solution comprising
- a) water,
- b) 20 to 55 wt.-% according to the total weight amount of the solution of compound 2,2,6,6-tetramethyl-4-(trimethylammonio)-1-piperidinyloxy of formula (I),
- c) less than 0.1 wt.-% according to the total weight amount of the solution alkali metal cation
- d) 0.1 to 12.5 wt.-% according to the total weight amount of the solution of compound N,N,N,1,2,2,6,6-octamethyl-4-piperidinammonium-1-oxide of formula (II)
- e) 0.01 to 20 wt.-% according to the total weight amount of the solution of compound 2,2,6,6-hexamethyl-4-(dimethylamino)-1-piperidinyloxy-N-oxide of formula (III)
2 more elements
Dependencies are inferred from the claim text.