Solid State Supercapacitors with High Energy Density and Low Leakage

R. L. Fink and Curtis W. Hill
Applied Nanotech Inc., Texas, United States

Keywords: Ultracapacitor, Barium Titanate, Spark Plasma Sintering, Energy Storage, Additive Manufacturing

Military operations, particularly surveillance and remotely operated technology-based activities, require increasingly energy dense power supplies, while remaining small, low-noise, and long lived. Additionally, it is advantageous to have long component life (many charge/discharge cycles), the ability to charge quickly, be able to operate in a wide variety of environmental conditions. We are developing a solid-state supercapacitor module to replace standard electrochemical batteries to achieve energy greater than 450 W-hr/L, retain charge for at least 30 days, and operate from -40 degrees C to +60 degrees C. Our approach includes additive manufacturing together with an an optimized sintering process to produce a solid state supercapacitor with giant permittivity and low dielectric loss to overcome the limitations of both the electrochemical batteries presently in use and of currently available electrochemical ultracapacitors.