Reversible work by electrochemical intercalation of graphitic materials

Cameron Massey; Geoffrey McKnight; William Barvosa-Carter; Ping Liu

doi:10.1117/12.601491

6 May 2005 Reversible work by electrochemical intercalation of graphitic materials

Cameron Massey, Geoffrey McKnight, William Barvosa-Carter, Ping Liu

Proceedings Volume 5759, Smart Structures and Materials 2005: Electroactive Polymer Actuators and Devices (EAPAD); (2005) https://doi.org/10.1117/12.601491
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2005, San Diego, California, United States

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.

Citation Download Citation

Cameron Massey, Geoffrey McKnight, William Barvosa-Carter, and Ping Liu "Reversible work by electrochemical intercalation of graphitic materials", Proc. SPIE 5759, Smart Structures and Materials 2005: Electroactive Polymer Actuators and Devices (EAPAD), (6 May 2005); https://doi.org/10.1117/12.601491

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