DuPont™ Hybrid Membrane Technology (HMT) nanofiber separator made with nylon 6,6 is the first commercially available offering for energy storage devices. Ideal for use in aluminum electrolytic capacitors and electrochemical double layer capacitors, this separator gives manufacturers a long list of important benefits, including: higher capacitance, higher power, improved safety and ease of manufacturing. 

DuPont™ HMT offers versatile, high-value solutions for improving performance and safety, while reducing total system costs in energy storage devices. Using the innovative DuPont™ HMT process, we are developing separators that will enable manufacturers to:

Design smaller devices that pack more power
Thinner separators with lower ionic resistance occupy less space and offer higher energy density.  Thus, energy storage devices made with DuPont™ HMT nanofiber separators can be smaller while delivering increased power.

Achieve higher yields and increased reliability
Random orientation of fibers creates uniform properties in both directions. The superior uniformity, high surface area and small pore size of DuPont™ HMT nanofiber separators increase manufacturing yields and improve reliability by helping to prevent failures and shorts.

Improve safety
High temperature stability means that DuPont™ HMT nanofiber separators will not shrink or melt in manufacturing or use, thus reducing the possibility of electrodes touching each other and causing thermal runaway.

Gain greater design flexibility
With its long list of superior properties, including high temperature stability, low ionic resistance and high surface area, and compatibility with a variety of coatings and additives, DuPont™ HMT nanofiber separators offer increased functionality, especially for challenging applications where other materials fail.

Benefit from increased manufacturing versatility
Superior chemical stability, combined with exceptional dimensional and mechanical stability make DuPont™ HMT well-suited for use in many types of manufacturing processes used for energy storage devices. What’s more, wettability in typical organic and aqueous electrolytes makes DuPont™ HMT adaptable to these processes for increased efficiency. In addition, DuPont™ HMT can withstand winding under tension in high-speed automatic winders where separators and electrodes are wound together.

Additional products are currently under development, including DuPont™ HMT nanofiber separators for lithium ion batteries and NiMH batteries, which will be introduced soon.

Literature
DuPont™ Hybrid Membrane Technology (HMT) Brochure