Electrolyte for redox flow battery and redox flow battery system

Patent metadata

Field	Value
Publication number	US-2017229728-A1
Application number	US-201515501150-A
Country	US
Kind code	A1
Filing date	Jul 9, 2015
Priority date	Aug 1, 2014
Publication date	Aug 10, 2017
Grant date	—

Abstract

An electrolyte for a redox flow battery has a total concentration of arsenic ions and antimony ions of 15 mass ppm or less. In an example of the electrolyte for a redox flow battery, preferably, the concentration of the arsenic ions is 10 mass ppm or less. In another example of the electrolyte for a redox flow battery, preferably, the concentration of the antimony ions is 10 mass ppm or less.

First claim

1 . An electrolyte for a redox flow battery having a total concentration of arsenic ions and antimony ions of 15 mass ppm or less, (excluding the case where the concentration of arsenic ions is 1 mass ppm or less and the concentration of antimony ions is 1 mass ppm or less),
a concentration of vanadium ions of 1 to 3 mol/L, a concentration of free sulfuric acid of 1 to 4 mol/L, a concentration of phosphoric acid of 1.0×10 −4 to 7.1×10 −1 mol/L, a concentration of ammonium of 20 mass ppm or less, and a concentration of silicon of 40 mass ppm or less.

2 . The electrolyte for a redox flow battery according to claim 1 , wherein the concentration of the arsenic ions is 10 mass ppm or less.

3 . The electrolyte for a redox flow battery according to claim 1 , wherein the concentration of the antimony ions is 10 mass ppm or less.

4 . (canceled)

5 . A redox flow battery system comprising a redox flow battery to which the electrolyte for a redox flow battery according to claim 1 is supplied.

6 . The redox flow battery system according to claim 5 , further comprising;
a pipe for supplying and discharging the electrolyte for a redox flow battery to and from the redox flow battery; and a transparent portion provided in part of the pipe.

Assignees

• Sumitomo Electric Industries

Inventors

• Dong Yongrong
• Sekine Ryojun
• Moriuchi Kiyoaki

Classifications

• H01M8/188 Primary

  by recharging of redox couples containing fluids; Redox flow type batteries · CPC title

• H01M8/04276

  Arrangements for managing the electrolyte stream, e.g. heat exchange · CPC title

• H01M2300/0002

  Aqueous electrolytes · CPC title

• H01M8/04477

  of the electrolyte · CPC title

• H01M8/04067

  Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins · CPC title