Materials, Electrodes, and Cell Designs

4 Materials, Electrodes, and Cell Designs 3.4.1 Electrode Materials 

Deposition of pseudocapacitive materials is done in situ on a carbon electrode formed by coating the collector through CVD growth, electrodeposition, or slurry. The CNT aspect ratio is important to promote porous 

EIS of PEDOT-SS electrode in 1 M oxalic acid at 0.5 V (open circuit potential) after (a) 0, (b) 200, (c) 500, and (d) 1000 charge-discharge cycles AU frequency values inside the figure are in Hz. (Source Patra, S., and N. Munichandraiah. 2007. Journal of Applied Polymer Science, 106, 1160-1171. With permission.) 

PANl provided the most uniform deposition and morphology, resulting in a capacitance of 500 F/g at a 1 V window. It is of interest that in a symmetric two-electrode cell, the capacitance for the material dropped to 250 F/g and the scan window was reduced by the oxygen evolution and charge 

Cyclic voltammograms illustrating effects of CNTs within ECP composite, compared to using carbon black additives to improve pseudocapacitive efficiency and charge capability. Source Raymundo-Pinero, E. et al. 2005. Journal of the Electrochemical Society, 152, A229. With permission.) 

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