articleScienceAug 18, 2006GREEN OA

Anomalous Increase in Carbon Capacitance at Pore Sizes Less Than 1 Nanometer

JCJohn ChmiolaGYGleb YushinYGYury GogotsiCPCristelle PortetPSPatrice Simon

Centre National de la Recherche Scientifique · Université Toulouse III - Paul Sabatier · +2 more institutions

PubMed
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Abstract

Carbon supercapacitors, which are energy storage devices that use ion adsorption on the surface of highly porous materials to store charge, have numerous advantages over other power-source technologies, but could realize further gains if their electrodes were properly optimized. Studying the effect of the pore size on capacitance could potentially improve performance by maximizing the electrode surface area accessible to electrolyte ions, but until recently, no studies had addressed the lower size limit of accessible pores. Using carbide-derived carbon, we generated pores with average sizes from 0.6 to 2.25 nanometer and studied double-layer capacitance in an organic electrolyte. The results challenge the…

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Authors

6

Topics & keywords

Topics
Keywords
  • Supercapacitor
  • Electrolyte
  • Capacitance
  • Materials science
  • Nanometre
  • Carbon fibers
  • Ion
  • Electrode
UN Sustainable Development Goals
  • Affordable and clean energy
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