Rechargeable Lithium-Sulfur Battery with Non-Porous Ceramic Separator

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$98,572.00
Award Year:
2008
Program:
SBIR
Phase:
Phase I
Contract:
FA8650-08-M-5905
Award Id:
86600
Agency Tracking Number:
F073-044-0203
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
2425 South 900 West, Salt Lake City, UT, 84119
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
089500540
Principal Investigator:
JohnGordon
Mgr. Advanced Battery Development
(801) 978-2138
johng@ceramatec.com
Business Contact:
RaymondMiller
CFO/Secretary
(801) 978-2176
rkm@ceramatec.com
Research Institute:
n/a
Abstract
Feasibility of a rechargeable lithium battery with sulfur cathode will be demonstrated. Air Force needs high specific energy, low cost rechargeable batteries for solar energy storage. Low cathode utilization and cycle fade have prevented Li-S batteries from reaching their potential. Cathode utilization can be improved dramatically using apolar and polar solvents in combination. Typically porous separators are used for lithium batteries, allowing constituents to migrate, resulting in cycle fade. To prevent inter-electrode constituent migration and capacity fading over charging cycles, a non-porous lithium ion conductive ceramic membrane will be utilized. The membrane developed recently at Ceramatec has conductivity of 1 mS/cm at 25C and 0.6 mS/cm at -20C. The membrane can be as thin as 10's of microns with a laminated porous layer serving as mechanical support. The non-porous separator will prevent dendritic shorting, improving anode safety along with the use of an unreducible lithium salt. Specific energy theoretically is 2600 Wh/kg with a metallic lithium anode or 630 Wh/kg with a lithium carbon anode. Practical batteries would be >1000 or 250 Wh/kg with the two respective anodes. In Phase 1, several factors will be examined to determine their impact on capacity at different charge and discharge rates including a 0.5C rate, the highest rate anticipated for discharging.

* information listed above is at the time of submission.

Agency Micro-sites


SBA logo

Department of Agriculture logo

Department of Commerce logo

Department of Defense logo

Department of Education logo

Department of Energy logo

Department of Health and Human Services logo

Department of Homeland Security logo

Department of Transportation logo

Enviromental Protection Agency logo

National Aeronautics and Space Administration logo

National Science Foundation logo
US Flag An Official Website of the United States Government