Future lays somewhere beyond lithium-based chemistries-11

I. Next Generation Batteries 2013: April 30- May 1, 2013 - Boston, MA
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Hotel Discount Deadline is April 6, 2013 - Click to Book your Room

II. Northeastern University Announces a Two Day Summit on Large Scale Energy Storage: May 2-3, 2013 in Boston, MA USA
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Nanofiber/Microfiber Lithium Ion Battery Separators

Current stretched porous film battery separators for lithium ion batteries are thin, strong, and provide a good barrier between electrodes, at the cost of having very high internal resistance and low ionic flow.

In this work, linear nanofibers and microfibers are combined in wet laid nonwoven processes to give separators that are strong and thin, but have higher porosity (60%) and much higher ionic flow.
Batteries made with these separators are able to give similar performance at much higher electrode coat weights, reducing the surface area of both current collectors and separator and also the volume of electrolyte needed.

Total mass reduction can be as high as 20% (1.3 kg/kWh), with raw material cost savings of over 25% ($55/kWh).

Volume savings are 0.5 liters/kWh.

Batteries made with similar construction show much higher charge and discharge rate capability.

Temperature stability is also improved, from a current stability temperature of about 110°C up to 175°C.

Applications include all power source applications that require high energy density, high power, high temperature stability, including cell phones, laptop and tablet computers, power tools, and electric and hybrid vehicles.

This presentation will be given by Brian Morin, of Dreamweaver International at Next Generation Batteries 2013.

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