Porous Power Technologies (PPT) is presenting its patent pending clean battery technology as it seeks to draw interest from investors. PPT’s ultraporous polymer membrane is used as a separator between battery and ultracapacitor electrodes, keeping them from shorting while enabling significantly faster charging, better high-rate capacity, and longer cycle life than competing products, according to the company.
PPT’s combination of high porosity (80%), small uniform pore size (<1 micron), and strength in a thin membrane is well-suited for use in lithium-ion batteries. The benefits of the company’s patent-pending products are claimed to be unique – the process used to produce leading commercial separators is inherently limited to <50% porosity, and those with higher porosities are generally too thick and/or too expensive for use in lithium batteries. PPT separators offer similar performance improvements in ultracapacitors, and separators for other battery chemistries have been produced as well.
