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Modern Theories of Carbon-Based Electrochemical Capacitors: A Short Review

[+] Author Affiliations
Vincent Meunier, Jingsong Huang, Bobby G. Sumpter

Oak Ridge National Laboratory, Oak Ridge, TN

Guang Feng, Rui Qiao

Clemson University, Clemson, SC

Paper No. IMECE2010-41003, pp. 21-30; 10 pages
doi:10.1115/IMECE2010-41003
From:
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 11: New Developments in Simulation Methods and Software for Engineering Applications; Safety Engineering, Risk Analysis and Reliability Methods; Transportation Systems
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4448-9
  • Copyright © 2010 by ASME

abstract

Theoretical models for electrochemical capacitors range from the original Helmholtz model and mean-field continuum models, to the surface curvature-based post-Helmholtz models, and to modern atomistic simulations. Here, we review current theoretical models that have been useful at shedding light on experimental findings but also provide predictive capabilities that are needed to achieve the optimization of supercapacitors. Due to the non-planar surface of materials at the nanoscale, the original Helmholtz model is gradually found to be outdated, in particular for carbon materials. We show that the surface curvature-based models provide a better description of the interfacial behavior of carbon materials.

Copyright © 2010 by ASME
Topics: Carbon , Capacitors

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