Sodium Sulphur Battery
Uses a solid electrolyte of beta aluminium and liquid electrodes of molten sulphur and sodium. These batteries require to be heated to around 325°C in order to operate because it is at these temperatures that sulphur and sodium will melt.
- High energy density
- High efficiency
- High operating temperature
The Ford Motor Company patented the sodium-sulfur battery in 1965. Used in Ford Ecostar van.