Redox flow batteries: Energy storage systems for renewables
Higher output for industrial use
Securing sources. That’s good for the environment, but it poses problems for the energy sector. Wind and solar do not generate electricity at a constant rate. Their output depends on the weather. So in the future we will need storage systems to keep the grid in balance. For example, they could store excess electricity produced when it is very windy and then feed it back into the grid when the wind dies down.
Redox flow batteries store electricity as chemical energy in two large tanks. The tanks are filled with salts dissolved in inorganic acids. The tanks are connected with one or more electrochemical cells via which the batteries are charged and discharged. Redox flow batteries currently have an efficiency level of up to 80 percent. The surface area of the cells determines the output of the batteries.