期刊
CHEMICAL PHYSICS LETTERS
卷 347, 期 1-3, 页码 36-40出版社
ELSEVIER
DOI: 10.1016/S0009-2614(01)01037-5
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A novel type of composite electrode based on multiwalled carbon nanotubes (MWNTs) coated with polypyrrole (PPy) has been used in supercapacitors. A homogeneous layer of PPy has been deposited on the nanotubular materials by electrochemical polymerization of pyrrole, that in all cases enhances the specific capacitance. A maximum value of 163 F/g has been obtained for MWNTs prepared at 600 degreesC and modified by a PPy layer of 5 nm, whereas it is only 50 F/g for the pristine nanotubes. The open entangled network of the nanocomposite favors the formation of a three-dimensional electrical double layer allowing a more effective contribution of the pseudofaradaic properties of PPy. (C) 2001 Elsevier Science B.V. All rights reserved.
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