Ambient Temperature Cycling of an Na ‐ TiS2 Cell

Sodium‐titanium disulfide cells have been cycled at ambient temperature in sodium triethyl(N‐pyrrolyl)borate‐dioxolane electrolyte. During primary discharge at 2.5 mA/cm 2 two voltage plateaus or steps are seen in plots of cell emf vs. sodium stoichiometry in and a limiting cathode composition is reached when is 0.8. During repeated discharge and recharge cycling the capacity of the higher voltage step is lost while the capacity of the lower voltage step remains essentially constant. A simple prismatic design for sodium organic electrolyte cells is described and characteristic properties of the electrolyte are discussed.