Enzymatically Catalyzed Polymerization (ECP) - Derived Polymer Electrolyte for Rechargeable Li-Ion Batteries

Period of Performance: 05/28/1999 - 05/31/2001

$659K

Phase 2 SBIR

Recipient Firm

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

Research Topics

Abstract

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 I involves syntheses of polyphenol-based polymers by the enzymatic Catalysis method with objectives of developing an ionically conductive polymer electrolyte which is highly conductive over a wide temperature range, and which is stable at the negative and positive electrodes in Li-ion batteries. Task 2 involves R&D on commercially available polyphenol-based polymers, i.e. non-ecp derived. The objectives of this Task are the same as in Task 1. Task 3 involves carbonization (pyrolysis) of the various polyphenol-derived polymers. Both soft and hard carbons produced by pyrolysis will be evaluated for use as negative materials in Li-ion cells. Task 4 involves electrochemical characterization of the polymers, and the most promising polymers will be used for scale-up construction of prototype Li-ion cells which is the subject of Task 5. Task 5 involves prototype design and testing of 50 mAh cells at MaxPower. Task 6 involves the delivery of prototype cells (first and end of second year) to the Army for independent testing.