Urban Electric Power,
Keywords: zinc, battery, energy storage
Summary:Zinc is an earth-abundant environmentally benign electrochemical energy storage medium with a high capacity of ~800 mAh/g. In addition, redox reactions with zinc occur with kinetics and low overpotentials at room temperature. All this makes zinc an attractive candidate material for battery anodes. Depending on the application, cathode materials based on nickel hydroxide, manganese dioxide as well as air cathodes have been applied. Manganese dioxide cathodes are of particular interest because of their low cost and high two-electron capacity ~600 mAh/g. The talk will focus on recent developments in zinc manganese dioxide aqueous batteries that access nearly the full two-electron capacity of both anode and cathode materials. Long-duration energy storage and deployments in the context of renewables firming to assure capacity will be discussed.