Description:
Polysulfide Bromide battery (PSB) is a regenerative fuel cell technology that provides a reversible electrochemical reaction between two salt solution electrolytes (sodium bromide and sodium polysulfide). Like other flow batteries, the power and energy ratings of Regenesys are independent of each other.
PSB electrolytes are brought close together in the battery cells where they are separated by a polymer membrane that only allows positive sodium ions to go through, producing about 1.5 volts across the membrane. Cells are electrically connected in series and parallel to obtain the desired voltage and current levels. The net efficiency of this battery is about 75%. This battery works at room temperature. It has been verified in the laboratory and demonstrated at multi-kW scale in the UK.
Deployment Status:
Regenesys Technologies is building a 120 MWh, 15 MW energy storage plant at Innogy's Little Barford Power Station in the UK. It is expected to be in operation in 2003.
Tennessee Valley Authority (TVA) is also planning to build a 12 MW, 120 MWh unit in Mississippi (USA) to be operational in late 2004.
Developers / Suppliers:
Regenesys Technologies Limited
