scholarly journals Enhanced Stability and Driving Performance of GO–Ag-NW-based Ionic Electroactive Polymer Actuators with Triton X-100-PEDOT:PSS Nanofibrils

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 906 ◽  
Author(s):  
Minjeong Park ◽  
Seokju Yoo ◽  
Yunkyeong Bae ◽  
Seonpil Kim ◽  
Minhyon Jeon
Keyword(s):  
Composite Electrode ◽  
Low Voltage ◽  
Weight Ratio ◽  
Protective Layer ◽  
Driving Performance ◽  
Silver Nanowire ◽  
Composite Electrodes ◽  
Optimum Weight ◽  
Triton X ◽  
Voltage Activation

Ionic electroactive polymers (IEAPs) have received considerable attention for their flexibility, lightweight composition, large displacement, and low-voltage activation. Recently, many metal–nonmetal composite electrodes have been actively studied. Specifically, graphene oxide–silver nanowire (GO–Ag NW) composite electrodes offer advantages among IEAPs with metal–nonmetal composite electrodes. However, GO–Ag NW composite electrodes still show a decrease in displacement owing to low stability and durability during driving. Therefore, the durability and stability of the IEAPs with metal–nonmetal composite electrodes must be improved. One way to improve the device durability is coating the electrode surface with a protective layer. This layer must have enough flexibility and suitable electrical properties such that it does not hinder the IEAPs’ driving. Herein, a poly(3,4-ethylenedioxythiophene)–poly(styrenesulfonate) (PEDOT:PSS) protective layer and 4-(1,1,3,3-tetramethylbutyl)phenyl-polyethylene glycol (Triton X-100) are applied to improve driving performance. Triton X-100 is a nonionic surfactant that transforms the PEDOT:PSS capsule into a nanofibril structure. In this study, a mixed Triton X-100/PEDOT:PSS protective layer at an optimum weight ratio was coated onto the GO–Ag NW composite-electrode-based IEAPs under various conditions. The IEAP actuators based on GO–Ag NW composite electrodes with a protective layer of PEDOT:PSS treated with Triton X-100 showed the best stability and durability.

scholarly journals High Brightness Organic Light-Emitting Diodes with Capillary-Welded Hybrid Diameter Silver Nanowire/Graphene Layers as Electrodes

Micromachines ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 517 ◽  
Author(s):  
Jianhua Zhang ◽  
Yiru Li ◽  
Bo Wang ◽  
Huaying Hu ◽  
Bin Wei ◽  
...  
Keyword(s):  
Indium Tin Oxide ◽  
Heat Dissipation ◽  
Composite Electrode ◽  
Silver Nanowires ◽  
Silver Nanowire ◽  
Composite Electrodes ◽  
Light Emitting ◽  
Graphene Layers ◽  
Graphene Composite ◽  
Organic Light

The development of silver nanowire electrodes is always limited due to some disadvantages, such as roughness, oxidative properties, and other disadvantages. In this research, a capillary-welded silver nanowire/graphene composite film was used as an electrode for organic light-emitting diode (OLED) devices. As an encapsulation layer, graphene reduced the surface roughness and the oxidation probability of silver nanowires. The composite electrode showed an excellent transmittance of 91.5% with low sheet resistant of 26.4 ohm/sq. The devices with the silver nanowire/graphene composite electrode emitted green electroluminescence at 516 nm, and the turn-on voltage was about 3.8 V. The maximum brightness was 50810 cd/cm2, which is higher than the indium tin oxide-based (ITO-based) devices with the same configuration. Finally, it was proved that the silver nanowire/graphene composite electrodes possessed better heat dissipation than the ITO-based ones under energization. In summary, it means that this novel silver nanowires/graphene electrode has great potential in OLED device applications.

scholarly journals Fabrication of Metal Nanowire Based Stretchable Mesh Electrode for Wearable Heater Application

2021 ◽  
Vol 59 (8) ◽  
pp. 575-581
Author(s):  
Nam-Su Jang ◽  
Kang-Hyun Kim ◽  
Jong-Man Kim
Keyword(s):  
Polymer Composite ◽  
Low Voltage ◽  
Silver Nanowire ◽  
Body Parts ◽  
Composite Electrodes ◽  
Resistive Film ◽  
Low Voltage Operation ◽  
Smart Healthcare ◽  
Cell Architecture ◽  
Device Applications

In recent years, human-convenient smart wearable devices have attracted considerable attention as emerging applications in smart healthcare systems, soft robotics, and human-machine interfaces. In particular, resistive film heaters with mechanical flexibility and excellent mechanical and electrothermal performance have recently been widely explored for wearable thermotherapy applications. Here, we present a simple and efficient way of fabricating highly flexible and stretchable resistive film heaters based on a patterned silver nanowire (AgNW)/polymer composite structure. The AgNW/polymer composite electrodes were successfully prepared using a photolithographically patterned polymer mold based selective transfer of a AgNW percolation network. The photolithographic mold patterning process allows the heater fabrication to be precise and reproducible. The mesh-patterned AgNW/polymer composite heater exhibited the excellent electrothermal performance of ~46.7 oC at 3 V. This low-voltage operation is highly desirable in practical wearable device applications. Moreover, the AgNW/polymer heater can be stretched up to 20% without significant degradation in electrothermal performance thanks to its open-cell architecture, suggesting that the device can stably transfer heat to the skin after being attached to various body parts with curvilinear surfaces. The experimental results suggest that the mesh-structured AgNW/polymer composite heaters are highly feasible for use as a wearable thermotherapy tool in many emerging applications.

scholarly journals Low Voltage Activation of KCa1.1 Current by Cav3-KCa1.1 Complexes

PLoS ONE ◽  
2013 ◽  
Vol 8 (4) ◽  
pp. e61844 ◽  
Author(s):  
Renata Rehak ◽  
Theodore M. Bartoletti ◽  
Jordan D. T. Engbers ◽  
Geza Berecki ◽  
Ray W. Turner ◽  
...  
Keyword(s):  
Low Voltage ◽  
Voltage Activation

scholarly journals Recent progress in supercapacitors based on the advanced carbon electrodes

2019 ◽  
Vol 8 (1) ◽  
pp. 299-314 ◽  
Author(s):  
Yusheng Pan ◽  
Ke Xu ◽  
Canliu Wu
Keyword(s):  
Synergistic Effect ◽  
Conducting Polymers ◽  
Metal Oxides ◽  
Recent Progress ◽  
Composite Electrode ◽  
Research Progress ◽  
Carbon Electrodes ◽  
Composite Electrodes ◽  
Pure Carbon ◽  
Carbon Based

Abstract This paper demonstrates a brief review of the research progress of the advanced carbon-based materials for the supercapacitor electrodes. Diverse types of carbon-based electrodes exploited and reported to the literature are summarized and classified into pure carbon electrodes, carbon/metal oxides composite electrodes, carbon/metal oxides/conducting polymers composite electrodes as well as carbon electrodes based on other materials. Pure carbon electrodes are firstly introduced, confirming their merits and shortcomings. To cover the shortage of pure carbon electrodes and further enhances their electrochemical performance, a composite electrode, combined with metal oxides and conducting polymers, is respectively presented. It is worth noticing in this article that combining various materials to form composites has been one main direction to own a positive synergistic effect on the carbon-based electrodes.

scholarly journals Electrodeposition of 4-Benzenesulfonic Acid onto a Graphite-Epoxy Composite Electrode for the Enhanced Voltammetric Determination of Caffeine in Beverages

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Leonardo de A. Furtado ◽  
Mariana C. de O. Gonçalves ◽  
Carlos V. M. Inocêncio ◽  
Edilson M. Pinto ◽  
Daniela de L. Martins ◽  
...  
Keyword(s):  
Composite Electrode ◽  
Epoxy Composite ◽  
Reference Method ◽  
Diazonium Salts ◽  
Composite Electrodes ◽  
Wave Voltammetry ◽  
Linear Behaviour ◽  
Chromatographic Procedure ◽  
Kinetics Of

Caffeine is widely present in food and drinks, such as teas and coffees, being also part of some currently commercialized medicines, but despite its enhancement on several functions of human body, its exceeding use can promote many health problems. In order to develop new fast approaches for the caffeine sensing, graphite-epoxy composite electrodes (GECE) were used as substrate, being modified by different diazonium salts, synthetized as their tetraflouroborate salts. An analytical method for caffeine quantification was developed, using sware wave voltammetry (SWV) in Britton–Robinson buffer pH 2.0. Detection limits for bare electrode and 4-benzenesulfonic modified electrode were observed circa 145 µmol·L−1 and 1.3 µmol·L−1, respectively. The results have shown that the modification shifts the oxidation peaks to lower potential. Kinetics of the reaction limited by diffusion was more expressive when caffeine was added to the solution, resulting in decreases of impedance, characterized by lower Rct. All results for caffeine determination were compared to a reference chromatographic procedure (HPLC), showing no statistical difference. Analytical parameters for validation were suitably determined according to local legislation, leading to a linear behaviour from 5 to 150 µmol·L−1; precision of 4.09% was evaluated based on the RDC 166/17, and accuracy was evaluated in comparison with the reference method, with recovery of 98.37 ± 2.58%.

scholarly journals Mechanical Integrity of Conductive Carbon-Black-Filled Aqueous Polymer Binder in Composite Electrode for Lithium-Ion Battery

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1460
Author(s):  
Kehua Peng ◽  
Yaolong He ◽  
Hongjiu Hu ◽  
Shufeng Li ◽  
Bao Tao
Keyword(s):  
Carbon Black ◽  
Composite Electrode ◽  
Mechanical Stability ◽  
Critical Role ◽  
Active Material ◽  
Mechanical Damage ◽  
Lithium Ion ◽  
Spherical Particles ◽  
Inorganic Filler ◽  
Composite Electrodes

The mechanical stability of aqueous binder and conductive composites (BCC) is the basis of the long-term service of composite electrodes in advanced secondary batteries. To evaluate the stress evolution of BCC in composite electrodes during electrochemical operation, we established an electrochemical–mechanical model for multilayer spherical particles that consists of an active material and a solid-electrolyte-interface (SEI)-enclosed BCC. The lithium-diffusion-induced stress distribution was studied in detail by coupling the influence of SEI and the viscoelasticity of inorganic-filler-doped polymeric bonding material. It was found that tensile hoop stress plays a critical role in determining whether a composite electrode is damaged or not—and circumferential cracks may primarily initiate in BCC, rather than in other electrode components. Further, the peak tensile stress of BCC is at the interface with SEI and does not occur at full lithiation due to the relaxation nature of polymer composite. Moreover, mechanical damage would be greatly misled if neglecting the existence of SEI. Finally, the structure integrity of the binder and conductive system can be effectively improved by (1) increasing the carbon black content as much as possible in the context of meeting cell capacity requirements—it is greater than 27% and 50% for sodium alginate and the mixtures of carboxy styrene butadiene latex and sodium carboxymethyl cellulose, respectively, for composite graphite anode; (2) reducing the elastic modulus of SEI to less than that of BCC; (3) decreasing the lithiation rate.

Silver Nanowire-Polymer Composite Electrodes for Efficient Polymer Solar Cells

2011 ◽  
Vol 23 (38) ◽  
pp. 4453-4457 ◽  
Author(s):  
Zhibin Yu ◽  
Lu Li ◽  
Qingwu Zhang ◽  
Weili Hu ◽  
Qibing Pei
Keyword(s):  
Solar Cells ◽  
Polymer Composite ◽  
Polymer Solar Cells ◽  
Silver Nanowire ◽  
Composite Electrodes

Fabrication of high-performance composite electrodes composed of multiwalled carbon nanotubes and glycerol-doped poly(3,4-ethylenedioxythiophene):polystyrene sulfonate for use in organic devices

2015 ◽  
Vol 3 (28) ◽  
pp. 7325-7335 ◽  
Author(s):  
Dong-Jin Yun ◽  
Yong Jin Jeong ◽  
Hyemin Ra ◽  
Jung-Min Kim ◽  
Tae Kyu An ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
High Performance ◽  
Composite Electrode ◽  
Composite Electrodes ◽  
Polystyrene Sulfonate ◽  
Multiwalled Carbon ◽  
High Performance Composite ◽  
Organic Devices

The organic doping facilitates the high performance of MWCNT/PEDOT:PSS composite electrode in organic devices.

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