Low-Temperature Capable Polymer Battery

Period of Performance: 02/04/1999 - 02/28/2001


Phase 2 SBIR

Recipient Firm

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


MaxPower is proposing an expanded Phase II program to fully develop the Phase I results. It consists of 6 Tasks all directed at rate and capacity enhancements. Task 1 involves R&D on anode materials with objectives of improving electronic and ionic conductivities, increasing stabilities and improving deliverable capacity and rate from ambient temperatures down to at least -40 degrees C. Task 2 involves R8tD on liquid and polymer electrolytes based on mixtures of dipolar aprotic and aromatic organic solvents with a variety of ellectrolytes. The objectives of this Task are to develop pvdf electrolytes which are highly conductive from ambient temperatures down to at least -400 degrees C, and which are chemically and electrochemically stable with anode and cathode materials. Task 3 involves development of cathode materials with emphasis upon particle sire and inert conducting additives. All R80 results from Tasks 1-3 will be transferred to Task 4 where prototype Li-ion cells will be tested and the results inputted into Tasks 1-3. Where appropriate, reference electrodes will be used in all cell studies in Tasks 1, 3 and 4. Based on the developments from Tasks 1-4, manufacturing technology and prototype cells and batteries are the objectives of Tasks 5 and 6, respectively. BENEFITS: An expanded technology base with respect to enhanced energy and rate capabilities, in general, and ultra low temp. Operability, in particular, will help push the 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 PVdf-based technology provides another significant market dimension, commercially and militarily.