The cathode in a silver-zinc battery is a silver screen pasted with silver oxide. The anode is a porous plate of zinc, and the electrolyte is a solution of potassium hydroxide saturated with zinc hydroxide. Their high cost results from the amount of silver needed for the construction of these batteries. Used in Ford Ecostar van. The Ford Motor Company patented the sodium-sulfur battery in 1965.
Chlorine gas is highly lethal.
Each type of battery works best within a limited range of temperatures. The battery temperature can change with changing current flowing through the internal resistance of the battery. Consequently, the cells in the center may see a higher temperature rise than the ones near the outer boundaries of the battery package. The impact that temperature exerts on battery capacity can be explained with a simple model of the battery electrochemistry.