Can you explain the working principle of a flow battery for energy storage ?
Flow batteries are a type of rechargeable battery that store energy in two chemical solutions pumped past an ion-exchange membrane. Key components include electrolyte tanks, pumps, and the cell stack. During charging, electrical energy is converted into chemical energy by moving ions across the membrane, storing them as potential gradients. Discharging reverses this process to generate electricity. Flow batteries offer scalability, decoupling of power and energy, long lifespan, and good efficiency but face challenges like cost, maintenance, and size. They are suitable for large-scale energy storage applications.