Polythiophosphonate Electrolytes for Rechargeable Magnesium Batteries

75571S Safety is a key concern in the development of higher energy density rechargeable battery systems, such as used in electric and hybrid electric vehicles. This project will identify a superior non-aqueous, aprotic electrolyte that can effectively support the development of practical, rechargeable magnesium batteries. In Phase I, carbon-magnesium composite anodes were fabricated and shown to be superior in performance to metallic magnesium anodes. The intercalation chemistry of advanced cathodes were adjusted to maximize the magnesium loading. The components were assembled into functional full cells, and the thermal and electrochemical properties evaluated. In Phase II, the anode-cathode-electrolyte combinations, identified during Phase I, will be optimized and scaled up to real world battery systems. The complete magneisum battery, either primary and secondary, will contain a nonflammable electrolyte, and be safe to handle under ambient conditions. Performance at cold and hot temperatures will be evaluated. Commercial Applications and Other Benefits as described by the awardee: The technology should lead to the commercial development of new electrolytes and complete magnesium battery systems. Initial plans are to develop the materials for use in consumer batteries. Then, extensive testing would be conducted to develop prototype vehicular batteries.