Conducting polymer/graphite fiber composites for high charge density battery electrodes
- Johns Hopkins Univ., Baltimore, MD (United States). Dept. of Materials Science and Engineering
A porous graphite fiber matrix (Toray Graphite Paper) provides a practical substrate into which electropolymerization of conducting Polymers, such as Polypyrrole, may be carried out to form composite, porous electrode structures. The graphite matrix provides a lightweight, intrinsically conducting structure with high surface area. The resultant porous electrode structures offer possibilities for enhanced charge capacity and current availability characteristics over dense films produced on planar substrates. Polypyrrole/graphite composites prepared by anodic electropolymerization are characterized for their charge capacity and overall morphology as a function of polymerization time. Reversible charge capacities in excess of 4.0 C/cm{sup 2} or 70 mAh/g have been obtained for these polypyrrole/graphite composite electrodes. Charge release for thick films is slow due to mass transport limitations.
- OSTI ID:
- 43070
- Report Number(s):
- CONF-931024--; ISBN 1-56677-033-5
- Country of Publication:
- United States
- Language:
- English
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