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ECN publication
Trends in polymer electrolytes for secondary lithium batteries
Published by: Publication date:
ECN 1998
ECN report number: Document type:
ECN-RX--98-041 Article (scientific)
Number of pages:

Published in: Submitted to Journal of power sources (), , , Vol., p.-.

Polymer electrolytes are promising materials for the ever-growing needfor high energy density power sources for power and traction applications. With an emphasis on secondary lithium batteries, the field of polymer electrolytes has developed along three stages: dry solid systems, polymer gels, and polymer composites. The polymer gels and the polymer composites, the former incorporating organic solvents, show room temperature conductivities of 10"-3 S#centre dot#cm"-"1. The dry solid systems presently suffer from poor ionic conductivities (10"-"5 S#centre dot#cm"-"1 at 20C), but are safer than the former due to absence of any organic solvent which can cause environmental hazards. In the area of electrode systems, organo-sulfur polymers perform well as cathode materials and poly (p-phenylene) as anode material. Specific energies of 180 W#centre dot#h#centre dot#kg"-"1 have been demonstrated in cells containing these polymers. Examples of various test cells based on the above types of polymer electrolytes incorporating lithium metal, intercalation type electrodes, and polymer electrodes are reviewed. 262 refs.

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