High Cycle Life Thin-Film Lithium-Ion Polymer Batteries with Ultra Low Temperature Capabilities

Period of Performance: 04/30/1999 - 02/28/2000


Phase 1 SBIR

Recipient Firm

Maxpower, Inc.
141 Christopher Lane
Harleysville, PA 19438
Principal Investigator

Research Topics


MaxPower's Phase I program will develop new Li-ion polymer batteries based on innovative thin-film technology, innovative low temperature electrolyte solutions, and improved cathode materials for high capacities and high cycle life. The approaches for these objectives involve use of thin-film technology for cell components (graphite anode, polymer electrolyte and metal oxide cathode) to be carried out in 4 tasks. Task 1 involves selection of a highly stable and conductive polymer electrolyte over a wide temperature range. Task 2 involves selection of a high capacity lithium-intercalating metal oxide cathode based on LiCoO(sub 2) and LiNi(sub 1-x)Co(sub x)O(sub 2) materials. Task 3 is devoted to developing thin-film technology for electrode and electrolyte fabrication. The technology developed in Tasks 1-3 will be transferred to Task 4 where prototype thin-film Li-ion cells with fabricated, tested at MaxPower, and delivered to the Air Force for independent testing. Benefits: An expanded technology base with respect to thin-film technology, enhanced energy and rate capabilities and low temperature operability using new battery materials based on highly conductive polymer electrolytes will help push Li-ion rechargeable batteries toward wide dual (military and commercial) market acceptance. All types of portable devices and equipments, wireless communication devices, are key commercial applications. Flexible packaging inherent in the polymer-based technology provides another significant market dimension both commercially and militarily.