Abstract: A twin plate cathode structure (53) for use in an alkali metal/solid and alkali metal/oxyhalide cell assembly includes a plurality of cathode plates (54a, 54b) operatively associated with an anode (31), the twin plate cathode structure comprising at least two cathode bodies (56a, 56b) each including cathode active material portions, an electrode including two cathode current collector portions (58a, 58b) operatively associated with corresponding ones of the cathode bodies, and an intermediate conductor means (60) joining the two collector portions for making electrical connection to the cathode structure. A plurality of twin plate cathode structures are grouped or arranged to provide a cathode cell assembly in which there is provided means (eg. a lead bar) operatively connected to each of the intermediate conductor means (60) for making electrical connection to the cathode structure in the assembly.