Development of a Ni , NiCl2 Positive Electrode for a Liquid Sodium (ZEBRA) Battery Cell

Medium‐temperature liquid sodium (ZEBRA) battery cells, employing solid transition metal dichloride cathodes, are under active development. This paper details key aspects of the development of a Ni, positive electrode, operating in molten salt electrolyte. Cells using these materials have achieved a high degree of reversibility and long cell life (>2000 cycles) and operate over the temperature range 200°–350°C. The cell has an open‐circuit voltage of 2.58V at 300°C and is an attractive contender for use in high‐energy and power density advanced batteries. Mention is made to the related Fe‐based electrode.