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S. Vaquero, R. Diaz, M. A. Anderson, J. Palma. Insights into the influence of pore size distribution and surface functionalities in the behaviour of carbon supercapacitors. 2nd International Symposium on Enhanced Electrochemical Capacitors. (ISEE'Cap2011).12-16 June 2011 Poznan, Poland.

 

Abstract:

Carbons are the most usual electrode materials in supercapacitors due to their outstanding properties, such as good conductivity and stability, high attainable surface area, and low cost . The main mechanism for charge storage and release in carbons are electrostatic interactions at the electrode/electrolyte interface. With this mechanism at play, charge storage can be increased by increasing surface area, but good conductivities must be preserved, and pore size distributions shall be optimized for every electrolyte.

 

It was recently shown that ideal supercapacitor electrodes must have pore sizes matching the particular anion and cation present at the electrolyte . We hereby show that surface chemistry must also be optimized, and that surface functionalities present in carbons not only induce their pseudocapacitive behavior and modulate their wettability, but that may also determine whether or not cations or anions can enter the pores.

 

 

 

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Project acronym:
HESCAP

Project name:
 New Generation, High Energy and Power Density Supercapacitor Based Energy Storage System


Project reference:
FP7-ENERGY-214405

Start date: 01/04/2010
End date: 30/09/2013



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