Lithium Ion Battery Separator with High Temperature Stability

Award Information
Agency: Department of Defense
Branch: Army
Contract: W56HZV-13-C-0063
Agency Tracking Number: A2-5161
Amount: $1,542,263.16
Phase: Phase II
Program: SBIR
Awards Year: 2013
Solicitation Year: 2011
Solicitation Topic Code: A11-065
Solicitation Number: 2011.1
Small Business Information
Optodot Corporation
2 Kingsbury Ave, Watertown, MA, 02472
DUNS: 020801929
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Steve Carlson
 President&CEO
 (617) 393-1987
 scarlson@optodot.com
Business Contact
 Ben Sloan
Title: Product Manager
Phone: (617) 393-1987
Email: bsloan@optodot.com
Research Institution
 Stub
Abstract
A separator involving composite materials is provided that meets the lithium ion battery requirements for separators with high temperature stability at 220C and above and with mechanical strength and flexibility. An inherently low cost manufacturing process of coating the composite separator on a reuseable release substrate followed by delamination is shown on full scale production equipment to make the free-standing composite separator at high quality. The heat stable properties are obtained from using aluminum oxide particles at over 75% by weight that prevent any shrinkage of the composite separator. The mechanical strength without any brittleness is obtained from using a strong and flexible polymer with excellent lithium ion battery compatibility, so that the composite separator exceeds the tensile strength requirements while providing a high porosity and electrolyte conductivity over the battery lifetime. This composite separator can be incorporated into lithium ion batteries using existing manufacturing processes as a direct drop-in replacement for the current plastic separators that shrink greatly starting at 120C and is generic for use with various electrolyte and electrode materials for safer, lower cost, and higher performing lithium ion batteries for vehicles and other applications.

* information listed above is at the time of submission.

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