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Li-Air Cells with Ensured Safety and Prolonged Shelf-Life Using an Oxygen Selective Membrane Cathode

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: HQ0006-04-C-7060
Agency Tracking Number: B041-001-0481
Amount: $100,000.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: MDA04-001
Solicitation Number: 2004.1
Solicitation Year: 2004
Award Year: 2004
Award Start Date (Proposal Award Date): 2004-05-24
Award End Date (Contract End Date): 2004-11-24
Small Business Information
74 Batterson Park Road
Farmington, CT 06032
United States
DUNS: 003612603
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Jinxiang Dai
 Assistant Director R & D
 (860) 678-7561
Business Contact
 David Reisner
Title: President & CEO
Phone: (860) 678-7561
Research Institution

High performance lightweight energy production and storage technologies are needed to supplement or service as the primary power systems for high altitude airships in order to sustain long-term flight schedules. To address MDA~{!/~}s needs, US Nanocorp proposes to demonstrate the feasibility of fabricating a Li-air battery with a special air electrode for lightweight power source application with ensured safety and prolonged service time. Li-air batteries utilizing a non-aqueous electrolyte are capable of delivering extremely high energy, in excess of 3500 Wh/kg based on the mass of the carbon content of the air electrode. However, safety and cycle-life problems limit the application of the Li-air system. The basic causes of safety and cycle-life problems are from moisture attacking on lithium anode and nonaqueous electrolytes. US Nanocorp~{!/~}s solution to these problems is to use an oxygen selective membrane (~{!0~}OSM~{!1~}) permeable to oxygen but impermeable to moisture in air. This OSM will substitute the air diffusion layer as an oxygen accessing element in an air cathode, being totally resistant to moisture diffusion and allow electrolyte and lithium metal anode to be free of attacking from moisture in air. This Li-air battery system can be further developed into both military and civilian applications.

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

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