Preparation and characterization of polypyrrole films for three-dimensional micro supercapacitor

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	Preparation and characterization of polypyrrole films for three-dimensional micro supercapacitor
	Sun, Wei ; Chen, Xuyuan ; Chen XY(陈旭远)
刊名	http://dx.doi.org/10.1016/j.jpowsour.2009.04.063
	2009-09-05
关键词	ELECTROCHEMICAL PROPERTIES CAPACITANCE PROPERTIES FABRICATION COMPOSITES ELECTRODES MEMS
英文摘要	Institute for Microsystems Technology at Vestfold University College; Pen-Tung Sah MEMS research center in Xiamen University; State Key laboratory for Physical chemistry of solid surfaces in Xiamen Unive rsity; As electro-active electrodes for supercapacitors, micro polypyrrole (PPy) films doping with ClO(4)(-) (PPY(ClO4)) and Cl(-) (PPy(Cl)) are prepared on Ni layers modified three-dimensional (3D) structures in Si substrates. The key process to fabricate the 3D structures is high-aspect-ratio deep reactive ion etching, which result in significant increase of available surface area. Homogeneous conformal Ni layers and PPy films are deposited on the 3D structures by electroless plating and electropolymerization, respectively. The supercapacitor properties of PPy films are investigated by using cyclic voltammetry (CV). electrochemical impedance spectroscopy (EIS) and galvanostatic charge/discharge with three-electrode system in NaCl solution. It is shown that doping with ClO(4)(-) results in ideal supercapacitor behaviors with rectangle-like CV shapes at scan rates from 5 to 200 mV s(-1), linear galvanostatic charge/discharge curves at current loads from 0.5 to 2 mA and stable cyclic property. However, doping with Cl(-) gives rise to non-ideal properties of supercapacitor. SEM of the PPY(ClO4) shows that the surface of the PPY(ClO4) electrode is smooth and the thickness of the PPY(ClO4) film is about 2.5 mu m. The geometric capacitance of PPY(ClO4) is calculated as 0.030 F cm(-2) from CV at scan rate of 100 mV s(-1), 0.023 F cm(-2) from EIS and 0.027 F cm(-2) from galvanostatic discharge at 1 mAcm(-2) current density. (C) 2009 Elsevier B.V. All rights reserved.
语种	英语
出版者	J POWER SOURCES
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/90410]
专题	萨本栋－已发表论文
推荐引用方式 GB/T 7714	Sun, Wei,Chen, Xuyuan,Chen XY. Preparation and characterization of polypyrrole films for three-dimensional micro supercapacitor[J]. http://dx.doi.org/10.1016/j.jpowsour.2009.04.063,2009.
APA	Sun, Wei,Chen, Xuyuan,&陈旭远.(2009).Preparation and characterization of polypyrrole films for three-dimensional micro supercapacitor.http://dx.doi.org/10.1016/j.jpowsour.2009.04.063.
MLA	Sun, Wei,et al."Preparation and characterization of polypyrrole films for three-dimensional micro supercapacitor".http://dx.doi.org/10.1016/j.jpowsour.2009.04.063 (2009).