Highly Oxygen Permeable Perfluoro Membrane for the Air Cathode of Lithium-Air Batteries

Award Information
Agency: Department of Defense
Branch: Army
Contract: W911QX-07-C-0036
Agency Tracking Number: O063-EP4-2086
Amount: $99,994.00
Phase: Phase I
Program: SBIR
Awards Year: 2007
Solicitation Year: 2006
Solicitation Topic Code: OSD06-EP4
Solicitation Number: 2006.3
Small Business Information
325 Water Street, Wilmington, DE, 19804
DUNS: 808898894
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Stuart Nemser
 (302) 999-7996
Business Contact
 Louis DiNetta
Title: Business Manager
Phone: (302) 999-7996
Email: ldinetta@compactmembrane.com
Research Institution
This proposal addresses development of highly oxygen permeable perfluoromembranes for Lithium-Air organic electrolyte batteries. These batteries have demonstrated very high specific capacity (greater than 500 Wh/kg) at low rates in pure oxygen. Oxygen from the air can be utilized if a membrane is developed that allows for oxygen transport but prevents solvents in the organic electrolyte from diffusion out into cell or attacking the membrane. Compact Membrane Systems, Inc. (CMS) membranes are high flux, defect-free nonporous membranes with very good separation characteristics for passing small molecules such as oxygen while retaining large molecules such as organic based solvents. CMS perfluoromembranes have excellent chemical and thermal resistance and are not plasticized by organic solvents. Data on CMS perfluoro membranes indicate that oxygen/solvent permeability ratios of 850 to 2620 are feasible, well in excess of program target of 200. Program focus will be on providing high oxygen permeability while minimizing loss of the electrolyte material. Liquid-side mass transfer is important to maximize total oxygen transport. The CMS membranes are commercial in several related applications so the probability of technical success is high. The developed oxygen-selective perfluoromembrane is expected to have significant military and commercial applications.

* Information listed above is at the time of submission. *

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