Capacitor-Battery Hybrid Cell

Naval Facilities Engineering Command (NAVFAC) has need for a robust stationary electrical energy storage (EES) device with the best properties of both rechargeable batteries and electrochemical ultracapacitors; having energy density of 500 W/l, ability to deliver high power pulses of 5 kW/l, and capability to achieve 25,000 full depth of discharge cycles. There is also an emerging need for improved EES technology in the commercial electric power industry, where it is needed for integrating with variable output renewable sources such as wind and solar, and for both distributed and centralized siting in support of a more efficient and smart electricity generation and distribution grid. TIAX proposes to develop such an electrochemical EES device meeting the above energy, performance and life metrics. TIAX has already demonstrated the inherent ability of advanced active materials to deliver the levels of performance required in such a hybrid device, and the proposed program will demonstrate feasibility of developing an energy storage device that incorporates these materials to deliver that performance, and to do so with technologies that will yield manufacturing cost of less than $500 per kWh.