Ordered and Active Nanochannel Electrode Design for High‐Performance Electrochemical Actuator

Wu, Guan; Hu, Ying; Zhao, Jingjing; Tian, Li; Wang, Dongxing; Liu, Yang; Chen, Wei

doi:10.1002/smll.201600973

Cited by 47 publications

(50 citation statements)

References 52 publications

(67 reference statements)

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“…Meanwhile, the aniline monomers in electrolyte lost electron and were in-situ electrodeposited on the carbon nanotubes. Besides, the positive charged particle would be moved3435 to the electric field’s direction so that CNTs was accelerate to be vertical alignment36, leading to the increase of CNTs film. Then, PANI would continue to grow until they filled the entire network.…”

Section: Resultsmentioning

confidence: 99%

“…3b. However the capacitance would be decreased with electrochemical-induced time exceeding 60 min because the overgrowth PANI could not only inefficiently interact with VA-CNTs but also hinder the ion diffussion2936. The detailed specific capacitance variation was estimated in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In order to understand electrochemical induction of PANI/VA-CNTs affecting the electrochemical behavior of supercapacitors, the electrochemical impedance spectroscopy (EIS) was carried out23364041. As shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

High-performance Supercapacitors Based on Electrochemical-induced Vertical-aligned Carbon Nanotubes and Polyaniline Nanocomposite Electrodes

Tan

Wang

et al. 2017

Sci Rep

Self Cite

135

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Supercapacitors, which store electrical energy through reversible ion on the surface of conductive electrodes have gained enormous attention for variously portable energy storage devices. Since the capacitive performance is mainly determined by the structural and electrochemical properties of electrodes, the electrodes become more crucial to higher performance. However, due to the disordered microstructure and low electrochemical activity of electrode for ion tortuous migration and accumulation, the supercapacitors present relatively low capacitance and energy density. Here we report a high-performance supercapacitor based on polyaniline/vertical-aligned carbon nanotubes (PANI/VA-CNTs) nanocomposite electrodes where the vertical-aligned-structure is formed by the electrochemical-induction (0.75 V). The supercapacitor displays large specific capacitance of 403.3 F g−1, which is 6 times higher than disordered CNTs in HClO4 electrolyte. Additionally, the supercapacitor can also present high specific capacitance (314.6 F g−1), excellent cycling stability (90.2% retention after 3000 cycles at 4 A g−1) and high energy density (98.1 Wh kg−1) in EMIBF4 organic electrolyte. The key to high-performance lies in the vertical-aligned-structure providing direct path channel for ion faster diffusion and high electrochemical capacitance of polyaniline for ion more accommodation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

High-performance Supercapacitors Based on Electrochemical-induced Vertical-aligned Carbon Nanotubes and Polyaniline Nanocomposite Electrodes

Tan

Wang

et al. 2017

Sci Rep

Self Cite

135

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“…4b). The literature values were collected from independent references published during the past 13 years691325293031323334353637. This confirmed that the actuators based on nanostructured single-ion conductors enable the successful actuator operation with a micropower consumption, thus paving the way for more advanced biomimetic technologies in the future.…”

Section: Resultsmentioning

confidence: 53%

One-volt-driven superfast polymer actuators based on single-ion conductors

et al. 2016

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The key challenges in the advancement of actuator technologies related to artificial muscles include fast-response time, low operation voltages and durability. Although several researchers have tackled these challenges over the last few decades, no breakthrough has been made. Here we describe a platform for the development of soft actuators that moves a few millimetres under 1 V in air, with a superfast response time of tens of milliseconds. An essential component of this actuator is the single-ion-conducting polymers that contain well-defined ionic domains through the introduction of zwitterions; this achieved an exceptionally high dielectric constant of 76 and a 300-fold enhancement in ionic conductivity. Moreover, the actuator demonstrated long-term durability, with negligible changes in the actuator stroke over 20,000 cycles in air. Owing to its low-power consumption (only 4 mW), we believe that this actuator could pave the way for cutting-edge biomimetic technologies in the future.

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“…Over the past decade, a great number of materials including electromagnetic, electrostatic, piezoelectric, electrostrictive, magnetostrictive, shape memory alloy, responsive polymer, and hydrogel actuation material have been developed for smart devices applications. Electroincited materials can convert electrical energy into mechanical motions, which has found wide applications in the field of micro robots, sensors, artificial muscles, and bionic devices .…”

Section: Introductionmentioning

confidence: 99%

Electrothermal Actuator on Graphene Bilayer Film

Sang

Zhao

Tang

et al. 2017

Macro Materials & Eng

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AC) stimuli. Xiao et al. [30] fabricated a graphene/poly(vinyldene fluoride) (PVDF) bilayer actuator by coating of PVDF solution onto a porous graphene paper. The hybrid film exhibited electrodriven vibration having rapid response rate, large displacement, and durable stability. In those electrothermal actuators, Joule heating was generated when electric current passed through the graphene film. Then the thermal expansion resulted in the large amount of deflection of the graphene/ polymer bilayer film. Polymer actuator is advantageous because of its high sensitivity, low energy input, and larger expansion rate. In this work, reduced graphene oxide (RGO)-based actuator was fabricated by spin-coating a reduced graphene oxide solution onto a polymer substrate obtaining a bilayer structure actuator. Poly dimethylsiloxane (PDMS) or polyethylene (PE) polymer substrate was used to support the electric-heated RGO layer and enlarge the thermal expansion deformation. [31] The bilayer film showed responsive bending motion under DC or AC voltage driving. Several actuate modes were proposed according to the bilayer structure design and driving current control. Experimental Section Preparation of RGOGraphite powder (2 g) was added into 46 mL of concentrated H 2 SO 4 , followed by adding 1 g NaNO 3 into above mixture under stirring and cooling in an ice bath condition. The mixture was continuous stirred while 6 g KMnO 4 was added slowly to keep the temperature of mixture below 5 °C. Then the mixture was kept at 35 °C for 30 min, followed by adding 90 mL deionized water while stirring, and the temperature would rise up to 95 °C. The mixture was kept stirring for a further 30 min, and 100 mL deionized water and 10 mL 30% H 2 O 2 were added in sequence. The oxidized material was then washed with 1:10 (v:v) HCl solution one time and deionized water three times to remove metal ions, followed by centrifugation. The collected product was dried in a vacuum drying oven at 45 °C.To obtain RGO, the as-synthesized GO powder (10 mg) was suspended in 20 mL of distilled water by ultrasonication until a yellowish-brown colloid was obtained. Subsequently, few drops of ammonia solution (35%) were added to increase the pH up to 8 allowing stability of the sheets. 15 µL hydrazine hydrate (0.1 m) solution was added to the above solution and refluxed at 98 °C for 100 min in a water bath, affording the formation Electrothermal Actuator Electrodriven bilayer actuator is designed and fabricated by spin-coating a reduced graphene oxide solution onto a polymer substrate. The bonded interface properties, electrical and thermal conductivities are characterized through scanning electron microscopy and X-ray diffraction. The bilayer actuator exhibits fast and large bending response when a direct current voltage is applied to the graphene layer. Whereas it exhibits oscillation when an alternating current voltage is applied to the bilayer actuator. The effects of the layer structure and the electro-operation methods on the bending motions are studied. Two new ...

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Ordered and Active Nanochannel Electrode Design for High‐Performance Electrochemical Actuator

Cited by 47 publications

References 52 publications

High-performance Supercapacitors Based on Electrochemical-induced Vertical-aligned Carbon Nanotubes and Polyaniline Nanocomposite Electrodes

High-performance Supercapacitors Based on Electrochemical-induced Vertical-aligned Carbon Nanotubes and Polyaniline Nanocomposite Electrodes

One-volt-driven superfast polymer actuators based on single-ion conductors

Electrothermal Actuator on Graphene Bilayer Film

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