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Proceedings Paper

Reversible work by electrochemical intercalation of graphitic materials
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Paper Abstract

Graphite intercalation compounds are a class of materials systems formed as ions diffuse into a host graphite structure. The volume expansion associated with this process has been shown to be capable of performing work up to 3.8 MJ/m3. To evaluate GICs for solid state actuation, this study explores some factors affecting the rate at which the volume expansion occurs. Given that diffusion length has an exponential effect on rate, we tested a graphite paper comprised of 7-micron diameter PAN fibers. We found that the paper had ultimate strain and loading properties comparable to HOPG. The paper was cycled under various loads and temperatures to examine the strain rate and repeatability of the material. Testing showed a strong correlation between rate and temperature, while pressure had relatively little effect.

Paper Details

Date Published: 6 May 2005
PDF: 9 pages
Proc. SPIE 5759, Smart Structures and Materials 2005: Electroactive Polymer Actuators and Devices (EAPAD), (6 May 2005); doi: 10.1117/12.601491
Show Author Affiliations
Cameron Massey, HRL Labs., LLC (United States)
Geoffrey McKnight, HRL Labs., LLC (United States)
William Barvosa-Carter, HRL Labs., LLC (United States)
Ping Liu, HRL Labs., LLC (United States)

Published in SPIE Proceedings Vol. 5759:
Smart Structures and Materials 2005: Electroactive Polymer Actuators and Devices (EAPAD)
Yoseph Bar-Cohen, Editor(s)

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