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Nanofiber-based separator enhances electric vehicle battery performance

Posted: 11 Aug 2010 ?? ?Print Version ?Bookmark and Share

Keywords:nanotechnology? Li-ion? battery separator?

The Energain battery separator is the first nanofiber-based polymeric battery separator that enhances the performance and safety of Li-ion batteries, says DuPont.

The manufacturer said the Energain battery separator can increase power by 15 to 30 percent, increase battery life by up to 20 percent and improve battery safety by providing stability at high temperatures.

With more battery power, DuPont claimed that drivers can travel farther on a single charge and accelerate more quickly and safely. Also, for automobile and battery manufacturers, more battery power can reduce the number of batteries typically required in today's hybrid and electric vehicles.

Within the batteries, a separator is a sheet positioned between the two electrodes. It functions as a barrier that prevents the electrodes from touching while letting lithium ions pass back and forth to allow the charge and discharge of the battery. DuPont explained that Energain battery separators are produced into a web using a proprietary spinning process that creates continuous filaments with diameters between 200nm and 1,000nm.

The separators exhibit stability and low shrinkage in high temperatures and are saturable in electrolyte liquids. The result is "more efficient operation, longer battery life and improved safety," the company continued.

DuPont said it is building a facility in the US to manufacture Energain battery separators. Production is expected to start in the first quarter of 2011 and to initially provide enough material to supply up to 20 percent of today's hybrid and electric vehicle needs, the company stated.

- Anne-Francoise Pele
EE Times

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