Mechanoelectrical impedance of a carbide-derived carbon-based laminate motion sensor at large bending deflections

Abstract

The mechanoelectrical properties of a supercapacitor-like ionic electroactive polymer laminate with carbide-derived carbon-based electrodes are investigated using a special rig, which bends the laminate following a well-defined bending profile. The bending device is characterized by homogeneous and sinusoidal changes in curvature in a wide frequency range (1 mHz–3 Hz), and very high curvature amplitudes (up to ±121 m−1). During bending, the curvature of the laminate remains uniform. The parameters recorded during bending include the generated voltage, electric current and charge. The results show a nonlinear frequency response of the tested material in the whole investigated frequency range. Electric current and charge are found to be directly proportional to the area of the bent laminate, and are therefore advantageous for motion sensing.

Facile and effective repair of Pt/Nafion IPMC actuator by dip-coating of PVP@AgNPs

“…Due to high electronic conductivity, IPMCrepair exhibits much higher ionic currents compared to IPMC-old, thus IPMC-repair is expected to generate a better electromechanical response. With the scan rate increases from 0.1 to 0.5 V s −1 , the redox currents and the calculated EDLC capacitances of both IPMCs show decreasing tendencies [32][33][34]. Compared to IPMC-old, IPMC-repair exhibits higher EDLC capacitances under diverse scanning rates, suggesting a stronger charge-saving capability.…”

Self-Sensing Ionic Polymer Actuators: A Review

“…The amount of research about the sensing functionality of carbonaceous polymer laminates is rather modest but, so far, all the familiar sensing phenomena-generating signal in response to externally-induced motion [29,94,95] and curvature-dependent alteration of electrode resistance [32,96]-have been reported for at least actuators incorporating carbon nanotubes or carbide-derived carbon in their electrodes.…”

Electrochemically Driven Carbon-Based Materials as EAPs: Fundamentals and Device Configurations

“…There are several methods for fabrication of carbon-based actuators: (a) direct assembly process (Akle et al. 2006), where the layers of electrodes and membrane are fabricated separately followed by sandwiching the membrane layer between the layers of electrodes by hot pressing (Palmre et al 2010), and (b) spray painting (Must et al 2013), where activated carbon powder is mixed with ionomer solution and the suspension is sprayed directly onto the membrane. Printing techniques have also been applied allowing higher reproducibility and precision in fabricating microsize actuators.…”

“…Interestingly, both the dilatometric investigations and research on electroactive response of CDC composites confirmed the important role of carbon pore size on the volumetric and resizing effects. Microporous carbons have shown sufficient performance regarding response time and amplitude of motion, which both are desired properties in the case of the actuator while compared to carbon black or other porous carbons (Must et al 2013;Torop et al 2014b; Fig. 4).…”