NDLI: Electrochemical and electromechanical behavior of Nafion-based soft actuators with PPy/CB/MWCNT nanocomposite electrodes

Content Provider	Royal Society of Chemistry (RSC)
Author	Naji, Leila Rasouli, Haleh Hosseini, Mir Ghasem
Copyright Year	2017
Abstract	In this work, as an alternative to precious platinum electrodes in IPMC actuators, PPy/CB/MWCNT electrode actuators were successfully fabricated by electropolymerization of PPy on both sides of the CB/MWCNT-coated Nafion membranes. Electropolymerization of PPy was performed using cyclic voltammetry (CV) and chronopotentiometry (CHP) in water and acetonitrile (AN) to study the effect of the synthesis parameters on the physical, electrochemical and electromechanical characteristics of actuators. The electrochemical characteristics of the actuators were investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The physical and structural properties of the actuators were characterized using scanning electron microscopy (SEM), water uptake (WUP) and ion exchange capacity (IEC) determination methods. SEM analysis revealed that the surface morphology of actuators changes considerably by altering the synthesis parameters and that the finest cauliflower-like structure of the PPy film is formed in actuators prepared in AN using the CHP technique. These metal-free actuators showed ionic conductivity (29.88 mS cm−1) and capacitive characteristics (39.23 μF) about eleven and thirty six times higher than that considered for Pt-based IPMC actuators, respectively. The deposition of PPy/CB/MWCNT electrodes on the Nafion membrane also resulted in higher WUP (79.9%) and IEC (6.7 meq g−1) of the actuators, confirming the hydrophilic nature of the PPy-based electrodes. The maximum tip displacement of these actuators (at optimized conditions) was however about 26% lower than that of Pt-based IPMC actuators which can be improved by decreasing the thickness and surface resistance of the PPy film via altering the synthesis parameters.
Starting Page	3190
Ending Page	3203
Page Count	14
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	7
Issue Number	6
Journal	RSC Advances
DOI	10.1039/c6ra25771b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Spectroscopy Nanoarchitectures for lithium-ion batteries Electrode IEC Ion Scanning electron microscope Cyclic voltammetry Nafion Acetonitrile Electrochemistry Hydrophile International Electrotechnical Commission Electrical impedance
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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