Whilst, at operating temperature (250°C or above), both sodium and sulphur/sodium polysulphides are liquid in the sodium sulphur cell, only the sodium is molten at similar temperatures in the sodium metal chloride cell.
Whilst, at operating temperature (250°C or above), both sodium and sulphur/sodium polysulphides are liquid in the sodium sulphur cell, only the sodium is molten at similar temperatures in the sodium metal chloride cell.