Electrolyte for redox flow battery and redox flow battery

摘要

Provided are an electrolyte for a redox flow battery, the electrolyte allowing suppression of generation of precipitate and suppression of generation of hydrogen during a battery reaction; and a redox flow battery including the electrolyte. In the electrolyte for a redox flow battery, the total concentration of impurity element ions contributing to generation of precipitate during a battery reaction is 220 mass ppm or less, and the total concentration of platinum-group element ions is 4.5 mass ppm or less. In a case where the impurity element ions contributing to generation of precipitate include metal element ions, the total concentration of the metal element ions may be 195 mass ppm or less.

主权项

1. An electrolyte for a redox flow battery, comprising vanadium ions as an active material,
wherein a total concentration of impurity element ions contributing to generation of precipitate during a battery reaction is 220 mass ppm or less, and a total concentration of platinum-group element ions is 4.5 mass ppm or less.