Sulfonated Copper Phthalocyanine/Sulfonated Polysulfone Composite Membrane for Ionic Polymer Actuators with High Power Density and Fast Response Time

2017 ◽  
Vol 9 (34) ◽  
pp. 29063-29070 ◽  
Author(s):  
Taehoon Kwon ◽  
Hyeongrae Cho ◽  
Jang-Woo Lee ◽  
Dirk Henkensmeier ◽  
Youngjong Kang ◽  
...  
Keyword(s):  
Response Time ◽  
Power Density ◽  
Composite Membrane ◽  
High Power ◽  
Copper Phthalocyanine ◽  
Fast Response ◽  
High Power Density ◽  
Ionic Polymer ◽  
Fast Response Time ◽  
Sulfonated Polysulfone

Electrospun liquid crystal elastomer microfiber actuator

2021 ◽  
Vol 6 (57) ◽  
pp. eabi9704
Author(s):  
Qiguang He ◽  
Zhijian Wang ◽  
Yang Wang ◽  
Zijun Wang ◽  
Chenghai Li ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Power Density ◽  
High Power ◽  
Response Speed ◽  
Fast Response ◽  
Photothermal Effect ◽  
Isotropic Phase ◽  
High Power Density ◽  
Liquid Crystal Elastomer ◽  
Actuation Strain

Fibers capable of generating axial contraction are commonly seen in nature and engineering applications. Despite the broad applications of fiber actuators, it is still very challenging to fabricate fiber actuators with combined large actuation strain, fast response speed, and high power density. Here, we report the fabrication of a liquid crystal elastomer (LCE) microfiber actuators using a facile electrospinning technique. Owing to the extremely small size of the LCE microfibers, they can generate large actuation strain (~60 percent) with a fast response speed (<0.2 second) and a high power density (400 watts per kilogram), resulting from the nematic-isotropic phase transition of liquid crystal mesogens. Moreover, no performance degradation is detected in the LCE microfibers after 106 cycles of loading and unloading with the maximum strain of 20 percent at high temperature (90 degree Celsius). The small diameter of the LCE microfiber also results in a self-oscillatory behavior in a steady temperature field. In addition, with a polydopamine coating layer, the actuation of the electrospun LCE microfiber can be precisely and remotely controlled by a near-infrared laser through photothermal effect. Using the electrospun LCE microfiber actuator, we have successfully constructed a microtweezer, a microrobot, and a light-powered microfluidic pump.

THE AQUEOUS AND NON-AQUEOUS ELECTROCHEMISTRY OF POLYACETYLENE : APPLICATION IN HIGH POWER DENSITY RECHARGEABLE BATTERIES

1983 ◽  
Vol 44 (C3) ◽  
pp. C3-543-C3-550 ◽  
Author(s):  
A. G. MacDiarmid ◽  
R. B. Kaner ◽  
R. J. Mammone ◽  
A. J. Heeger
Keyword(s):  
Power Density ◽  
High Power ◽  
Rechargeable Batteries ◽  
High Power Density ◽  
Aqueous Electrochemistry

Welding with high brilliance lasers and high power density

2010 ◽  
Author(s):  
Andreas Patschger ◽  
Markus Franz ◽  
Jens Bliedtner ◽  
Jean Pierre Bergmann
Keyword(s):  
Power Density ◽  
High Power ◽  
High Power Density

High power density of AlGaAs/InGaAs doped-channel FETs with low DC power supply

2001 ◽  
Vol 37 (9) ◽  
pp. 597
Author(s):  
H.C. Chiu ◽  
S.C. Yang ◽  
F.T. Chien ◽  
Y.J. Chan
Keyword(s):  
Power Density ◽  
High Power ◽  
Power Supply ◽  
High Power Density ◽  
Dc Power ◽  
Dc Power Supply

Investigation on Key Parameters of NI HTS Field Coils for High Power Density Synchronous Motors

2021 ◽  
Vol 31 (5) ◽  
pp. 1-5
Author(s):  
Uijong Bong ◽  
Chaemin Im ◽  
Jonghoon Yoon ◽  
Soobin An ◽  
Seok-Won Jung ◽  
...  
Keyword(s):  
Power Density ◽  
High Power ◽  
High Power Density ◽  
Synchronous Motors

scholarly journals Dual-Cation Electrolytes Crosslinked with MXene for High-Performance Electrochromic Devices

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 874
Author(s):  
Soyoung Bae ◽  
Youngno Kim ◽  
Jeong Min Kim ◽  
Jung Hyun Kim
Keyword(s):  
Ionic Conductivity ◽  
Response Time ◽  
Indium Tin Oxide ◽  
High Performance ◽  
Fast Response ◽  
High Ionic Conductivity ◽  
Electrochromic Device ◽  
Fast Response Time ◽  
Coloration Efficiency ◽  
Conduction Pathway

MXene, a 2D material, is used as a filler to manufacture polymer electrolytes with high ionic conductivity because of its unique sheet shape, large specific surface area and high aspect ratio. Because MXene has numerous -OH groups on its surface, it can cause dehydration and condensation reactions with poly(4-styrenesulfonic acid) (PSSA) and consequently create pathways for the conduction of cations. The movement of Grotthuss-type hydrogen ions along the cation-conduction pathway is promoted and a high ionic conductivity can be obtained. In addition, when electrolytes composed of a conventional acid or metal salt alone is applied to an electrochromic device (ECD), it does not bring out fast response time, high coloration efficiency and transmittance contrast simultaneously. Therefore, dual-cation electrolytes are designed for high-performance ECDs. Bis(trifluoromethylsulfonyl)amine lithium salt (LiTFSI) was used as a source of lithium ions and PSSA crosslinked with MXene was used as a source of protons. Dual-Cation electrolytes crosslinked with MXene was applied to an indium tin oxide-free, all-solution-processable ECD. The effect of applying the electrolyte to the device was verified in terms of response time, coloration efficiency and transmittance contrast. The ECD with a size of 5 × 5 cm2 showed a high transmittance contrast of 66.7%, fast response time (8 s/15 s) and high coloration efficiency of 340.6 cm2/C.

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