Strain–capacitance relationship in polymer actuators based on single-walled carbon nanotubes and ionic liquid gels

2017 ◽  
Vol 199 ◽  
pp. 405-422 ◽  
Author(s):  
Hyacinthe Randriamahazaka ◽  
Kinji Asaka

We investigate the electromechanical properties of bucky-gel electrochemical actuators incorporating various amounts of single-walled carbon nanotubes and an ionic liquid electrolyte, 1-butyl-3-methylimidazolium tetrafluoroborate, that are able to convert electrochemical energy into mechanical energy. The interplay between mechanical and electrochemical effects is studied. The electromechanical responses are investigated by means of electrochemical impedance spectroscopy and bending displacement measurements. We develop a theoretical model that allows us to rationalize the electromechanical properties of the bucky-gel actuators. This model takes into account electrochemical stress due to the intercalation (de-intercalation) process, which generates the strain and bending of the actuators. We then analyze the relationship between the strain and the real part of the complex capacitance by introducing a strain–capacitance coefficient. This coefficient is related to the electrochemical stress and the amount of the ionic adsorption (desorption) at the double-layer. From a practical point of view, the determination of the strain–capacitance coefficient is helpful for characterizing and optimizing the performance of electrochemical actuators.

RSC Advances ◽  
2019 ◽  
Vol 9 (15) ◽  
pp. 8215-8221 ◽  
Author(s):  
Naohiro Terasawa ◽  
Kinji Asaka

This study describes new actuators with cellulose nanofibers, single-walled carbon nanotubes and ionic liquids (CNFs/SWCNTs/ILs) and examines the electrochemical and electromechanical properties of the CNF/SWCNT/IL gel hybrid actuators.


RSC Advances ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 2443-2449 ◽  
Author(s):  
Naohiro Terasawa

The electrochemical and electromechanical properties of actuators based on an ionic and non-ionic fluoropolymer gel, and an ionic liquid, fabricated using a single-walled carbon nanotube gel electrode.


2015 ◽  
Vol 3 (31) ◽  
pp. 15858-15862 ◽  
Author(s):  
Chuiyan Kong ◽  
Weizhong Qian ◽  
Chao Zheng ◽  
Wei Fei

A nanofluid electrolyte of single walled carbon nanotubes and ionic liquids enhances the energy density, power density and cycling stability of nanotube electrodes at 5 V.


Author(s):  
Sujay Deshmukh ◽  
Zoubeida Ounaies

Efforts to enhance the electromechanical properties of Poly(vinylidene fluoride) (PVDF) and its copolymers have been directed at optimizing the molecular chemistry, stretching and poling parameters. This study investigates an alternative approach to enhancing the properties via adding nanoinclusions in PVDF. We investigate the enhanced electrostrictive response in PVDF by adding Single Walled Carbon Nanotubes (SWNTs). We also show the change in the non-polar morphology of “as-is” PVDF to the polar γ phase by adding SWNTs and eventually to the piezoelectric β phase by stretching the nanocomposites.


2008 ◽  
Vol 80 (8) ◽  
pp. 2672-2679 ◽  
Author(s):  
M. López-Pastor ◽  
A. Domínguez-Vidal ◽  
M. J. Ayora-Cañada ◽  
B. M. Simonet ◽  
B. Lendl ◽  
...  

2012 ◽  
Vol 124 (34) ◽  
pp. 8618-8622 ◽  
Author(s):  
Jeongho Jay Lee ◽  
Akihisa Yamaguchi ◽  
Md. Akhtarul Alam ◽  
Yohei Yamamoto ◽  
Takanori Fukushima ◽  
...  

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