Proton exchange membrane electrochemical capacitors and fuel cells for pulse power applications

An all-solid-state proton exchange ionomer-based electrochemical capacitor that represents a potentially more volume and weight effective, reliable, safer, and longer life alternative to the typical liquid electrolyte electrochemical capacitor systems was developed. The authors describe the approach used to increase the capacitance per unit weight and area of these electromechanical devices through the development and ionomer coating of 5- to 20-Å RuO₂ particles, dispersed on high-surface-area carbon and alternative substrates. Also, some comparative test results are presented on the use of advanced solid-ionomer high-energy-density fuel cell devices for pulse power applications