Safer Battery with Switchable Polymer Coating

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$99,976.00
Award Year:
2010
Program:
SBIR
Phase:
Phase I
Contract:
NNX10CD32P
Award Id:
95392
Agency Tracking Number:
095225
Solicitation Year:
n/a
Solicitation Topic Code:
X7
Solicitation Number:
n/a
Small Business Information
20 New England Business Center, Andover, MA, 01810
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
073800062
Principal Investigator:
Christopher Lang
Principal Investigator
(978) 689-0003
lang@psicorp.com
Business Contact:
B. David Green
President and CEO
(978) 689-0003
green@psicorp.com
Research Institute:
n/a
Abstract
Physical Sciences Inc. (PSI) proposes to utilize a switchable polymer (SWP) to prevent catastrophic failure due to internal shorting or overdischarge in lithium-ion batteries. The SWP, applied to both the surface of the cathode particles and the cathode current collector, can be reversibly "switched" from an insulator to a conductor upon oxidation permitting normal battery operation. In Phase I, PSI will demonstrate that upon a short or overdischarge the polymer reversibly switches to an insulator reducing the current flow to the cathode material protecting the system and preventing unsafe operation. This reduced current flow will be demonstrated to decrease the localized heat generation by more than two orders of magnitude. PSI will also demonstrate that insulation of the cathode material limits irreversible degradation of the discharge capacity upon overdischarge maintaining cell balance and improving cycle life. In the Phase II program, we will scale up the coating procedure to a production scale, in order to demonstrate the technology in a 5Ah battery. At the conclusion of Phase II, PSI will have demonstrated the technology in full battery systems and be prepared to partner with NASA's industrial partner SAFT America to have cells built for a mock application demonstration.

* information listed above is at the time of submission.

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