Available Technology

New Dielectric Material for High-Performance, Solid-State Ultracapacitors

Nanoparticle-based formulations enable many novel energy storage devices & manufacturing methods
NASA&#8217s technology is a dielectric materials formulation comprising polymers, organic binders, solvents, and surfactants, formulated together with a ceramic perovskite nanopowder. The ceramic nanopowder can be optimized for the required dielectric properties of capacitance, voltage breakdown, and leakage. This involves the addition of dopants or the use of advanced coatings on the powder particulates, and subsequent thermal treatments. The rheology of the formulation can be adjusted to work with a variety of coating or printing methods, from conventional thick-film methods to advanced inkjet or direct-write 3D printing methods used for printed electronics. 3D printing provides the ease of printed manufacturing along with the deposition of thinner layers (e.g., 5 microns in thickness vs. 50-100 micron layer via thick-film methods). Individual devices can then be formed in multilayer arrangements, or stacked and packaged as required for the given device application. The ink composition is a careful blend of polyimide or polyvinylidene fluoride (PVDF) polymers, solvents, surfactants, and barium titanate nanopowders. Proper ratios are needed for viscosity and processability (e.g., nanopowder wetting and dispersion), along with the optimal ultracapacitor device performance.
Patent Abstract: 
NASA's Marshall Space Flight Center has developed a high-performance dielectric material in the development of ultracapacitors to replace batteries. This new material, formulated as a composite ink or paste, is based on novel high-permittivity dielectric powders. This dielectric material has performance characteristics of rapid charging; ultra-low leakage; and an extremely high dielectric constant. Furthermore, select compositions can offer battery-like discharge behavior. These attributes make the invention a highly desirable dielectric material for the development and manufacture of novel energy storage devices, including ultracapacitors, batteries, and other devices requiring a high dielectric constant and/or high breakdown voltages. The ceramic material also has the advantage of being completely safe as compared to traditional electrochemical batteries. Targeting potential use for satellite propulsion systems, the invention is undergoing continued development at NASA.
Benefits 

<b>Tailorable rheology</b> for use in a range of coating and printing methods, including state-of-the-art aerosol inkjet and direct-write 3D printing systems, as well as traditional thick-film methods

applications 

Aerospace: space power and propulsion systems

Transportation: regenerative braking systems for cars, trucks, buses, and trains; batteries for hybrid and electric cars, as well as fuel cellpowered vehicles

Energy: smart grid and renewable energy

Defense: backup power supplies, laser weapons, and railguns

Health: medical devices

Reps: 
Patent Number: 
Internal Laboratory Ref #: 
MFS-TOPS-77
Patent Status: 
Patent Issue Date: 
March 17, 2017
Agency
NASA
Region
Southeast
State: 
Alabama
Phone: 
256-544-9151
Email: 
terry.taylor@nasa.gov
Lab Representatives
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