Energy Storage
Advanced films for next generation battery systems and high energy density capacitors
Performance Membrane Separators
Sigma is working to develop new and improved battery separators using its DryFab™ Vapor Deposition process to uniformly functionalize microporous and nano-fiber media to improve surface wetting properties - as well as performance at higher temperatures.
High Energy Density, High Temperature, Inverter Capacitors
Conventional film capacitors for power electronics applications (especially automotive) rely on polypropylene film, which is limited in how thin it can be extruded and begins to fail at temperatures exceeding 85º centigrade. Sigma, using its VaporFilm™ technology, is able to "extrude," dielectric films that are stable at temperatures exceeding 140ºC, are self-healing, have higher breakdown strength, and are up to 10x thinner than the thinnest polypropylene film available on the market today. The result is a high temperature inverter capacitor with greater than 5x energy density of even the smallest polypropylene film capacitor with the same voltage and capacitance rating.
Low ESR, Low Dissipation Factor, Film Capacitors
Sigma, using its PML Technology is able to produce capacitor films that exhibit lower dissipation factor and significantly lower ESR compared with conventional polypropylene capacitors. The result is greater reliability and performance at higher temperatures.