2,813 Hits in 3.6 sec

Nonlinear dielectric thin films for high-power electric storage with energy density comparable with electrochemical supercapacitors

Kui Yao, Shuting Chen, M. Rahimabady, M. S. Mirshekarloo, Shuhui Yu, F. E. H. Tay, T. Sritharan, Li Lu
2011 IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control  
Dielectric capacitors have the high power density with the fast discharge rate, but their energy density is typically much lower in comparison with electrochemical supercapacitors.  ...  Here we review the mechanisms and major characteristics of electric energy storage with electrochemical supercapacitors and dielectric capacitors.  ...  An electrochemical supercapacitor is typically based on electrochemical double-layer effects (EDLCs).  ... 
doi:10.1109/tuffc.2011.2039 pmid:21937333 fatcat:glmppxwhgnggtjxl2seah2vmhq

An Electrochemical, Low-Frequency Seismic Micro-Sensor Based on MEMS with a Force-Balanced Feedback System

Guanglei Li, Junbo Wang, Deyong Chen, Jian Chen, Lianhong Chen, Chao Xu
2017 Sensors  
In this study, devices were designed, fabricated, and characterized, producing comparable performances among individual devices.  ...  in an electrolyte solution and a feedback unit including a feedback circuit and a feedback magnet.  ...  effects of the capacitor.  ... 
doi:10.3390/s17092103 pmid:28902150 pmcid:PMC5621127 fatcat:h5qs7prhxfgolgs6dmpiyt6qoa

Si/Al2O3/ZnO:Al capacitor arrays formed in electrochemically etched porous Si by atomic layer deposition

Marianna Kemell, Mikko Ritala, Markku Leskelä, Emmanuel Ossei-Wusu, Jürgen Carstensen, Helmut Föll
2007 Microelectronic Engineering  
High surface area Si/Al 2 O 3 /ZnO:Al capacitors were formed in electrochemically etched porous silicon.  ...  Effective capacitance densities were between 2.0 and 2.5 lF/cm 2 , i.e., approximately 30 times higher than for a planar capacitor prepared under identical conditions, illustrating the effect of the enhanced  ...  Research on integrating multiple passive components in a single package has been going on for some time, and various approaches have been studied [1, 3] .  ... 
doi:10.1016/j.mee.2006.10.085 fatcat:3v5uh6heojek3cknhv5widhnze

High performance electrochemical capacitors from aligned carbon nanotube electrodes and ionic liquid electrolytes

Wen Lu, Liangti Qu, Kent Henry, Liming Dai
2009 Journal of Power Sources  
We report a new class of electrochemical capacitors by utilizing vertically aligned carbon nanotubes as the electrodes and environmentally friendly ionic liquids (ILs) as the electrolytes.  ...  Combining the highly capacitive behavior of carbon nanotube electrodes with the large electrochemical window of ionic liquid electrolytes, the resultant capacitors showed a high cell voltage, high energy  ...  a packaged capacitor, slightly exceeding those of the current electrochemical capacitor technology [3] .  ... 
doi:10.1016/j.jpowsour.2009.01.009 fatcat:6rn2rrx3d5gjjguphvbgt6xfda

A Fully Implantable Miniaturized Liquid Crystal Polymer (LCP)-Based Spinal Cord Stimulator for Pain Control

Seunghyeon Yun, Chin Su Koh, Jungmin Seo, Shinyong Shim, Minkyung Park, Hyun Ho Jung, Kyungsik Eom, Jin Woo Chang, Sung June Kim
2022 Sensors  
To overcome these limitations, here, we developed a fully implantable miniaturized spinal cord stimulator based on a biocompatible liquid crystal polymer (LCP).  ...  This LCP-based spinal cord stimulator opens new avenues for the development of a miniaturized but still effective spinal cord stimulator.  ...  A 240-µF tuning capacitor was connected in parallel to the receiver coil to maximize the voltage across the receiver coil.  ... 
doi:10.3390/s22020501 pmid:35062462 pmcid:PMC8778878 fatcat:ipiy6hnf3rgilo3ksq4y5ahxya

High-Density 3-D Capacitors for Power Systems On-Chip: Evaluation of a Technology Based on Silicon Submicrometer Pore Arrays Formed by Electrochemical Etching

Magali Brunet, Pascal Kleimann
2013 IEEE transactions on power electronics  
Integrating capacitors monolithically on the active chip or in package of power systems is discussed and solutions are proposed for minimising series resistance and achieving a high level of integration  ...  A technology based on nanolithography and silicon electrochemical etching is then detailed.  ...  deposition over 3D structures can be obtained [22] . 2) Integration in Power Systems: on-Chip (SoC) or in-Package (SiP).  ... 
doi:10.1109/tpel.2012.2233219 fatcat:3ghwcl3j3zb7rpabtaqtz7vl3m

Nano-capacitors as batteries including graphene electrodes and Ga-N mixed with bio-polymers as insulator

2019 Biointerface Research in Applied Chemistry  
We have shown that the Quantum effect has appeared in this capacitor due to the electropositive-electronegative coupled of wurtzite Ga-N and this effect cannot occur in the two electro negative or two  ...  Battery stores energy via a chemical process while a capacitor stores static electricity, therefore this generates when electric charges in a material are out of balance.  ...  Theoretical Studies of Solvent Effect on Normal Mode Analysis and Thermodynamic Properties of Zigzag (5,0) carbon nanotube .  ... 
doi:10.33263/briac91.806811 fatcat:27j7wh6svfhx3nm7bmw2tf5mla

Control of a Bidirectional Converter to Interface Electrochemical double layer capacitors with Renewable Energy Sources

2018 International Journal of Recent Trends in Engineering and Research  
the effect while working on experimental fuel cell designs.  ...  II.ULTRACAPACITOR Electric double-layer capacitors, also known as supercapacitors, electrochemical double layer capacitors (EDLCs) or ultra-capacitors are electrochemical capacitors that have an unusually  ... 
doi:10.23883/ijrter.conf.20171216.012.to9ve fatcat:helxgh5ic5fxjn2w7uizk27wt4

Printed electrochemical capacitors for energy scavenging sensor networks

Andrey Somov, James. W. Evans, Christine C. Ho, Paul. K. Wright, Roberto Passerone
2012 2012 Ninth International Conference on Networked Sensing (INSS)  
In this paper we present a kind of electrochemical capacitors manufactured using the direct write technology.  ...  The experimental results on scavenging outdoor solar radiation and indoor light, stored on the printed capacitors, demonstrate high potential in terms of supplying the sensor nodes.  ...  METHOD OF ELECTROCHEMICAL MATERIALS DEPOSITION In this section we describe a printing method for fabricating electrochemical capacitors directly onto a substrate.  ... 
doi:10.1109/inss.2012.6240577 dblp:conf/inss/SomovEHWP12 fatcat:jx5tao52yzharc5gcsdd45t5oy

Laser Scribing of High-Performance and Flexible Graphene-Based Electrochemical Capacitors

M. F. El-Kady, V. Strong, S. Dubin, R. B. Kaner
2012 Science  
The magnetic tunability has been studied in the very different system of exciton-polaritons in the near-infrared; see J. Tignon et al., Phys. Rev. Lett. 74, 3967 (1995). 32. R. G.  ...  Acknowledgments: This research was supported by the Swiss National Science Foundation (SNF) through the National Centre of Competence in Research Quantum Science and Technology and through SNF grant no  ...  (A to D) A GO film supported on a flexible Fig. 2 . 2 Evaluation of the performance of an LSG electrochemical capacitor in aqueous 1.0 M H 3 PO 4 solution.  ... 
doi:10.1126/science.1216744 pmid:22422977 fatcat:47sc4otffbf6pkn4bikjfwvm64

Synthesis of Aromatic and Aliphatic N-Heterocyclic Salts and Their Application as Organic Electrolyte Supporters in Electrochemical Capacitor

Young-Ji Kim, Jaeyeong Choi, Soo-Yeoun Kim, Seong-Ho Choi
2021 Applied Sciences  
Charge-discharge experiments were performed in the electrochemical capacitor with an anion-exchange membrane using a non-aqueous electrolyte prepared with a synthesized N-heterocyclic salt in acetonitrile  ...  capacitor (super capacitor).  ...  A typical electrochemical capacitor consists of two electrodes, an ion-permeable membrane, and an electrolyte packaged in a sealed container [1, 2] .  ... 
doi:10.3390/app11198824 fatcat:ztn4pjf7h5gebdznb4jtur4d3i

Amperometric Readout and Electrode Array Chip for Bioelectrochemical Sensors

Andrew Mason, Yue Huang, Chao Yang, Jichun Zhang
2007 2007 IEEE International Symposium on Circuits and Systems  
The chip features a CMOS potentiostat with high resolution, rangeprogrammable current readout and electrochemical cell potential drive circuitry, which can perform on-chip chronoamperometry and cyclic  ...  The 3x3mm 2 chip nominally hosts a 4x4 working electrode array and supports amperometric outputs ranging from 10pA to 10µA with sub-pA resolution.  ...  Thus, by using on-chip programmable capacitors for C int and C in and adjusting the clock frequency, the readout circuit can be adapted to a large input current span.  ... 
doi:10.1109/iscas.2007.378452 dblp:conf/iscas/MasonHYZ07 fatcat:dp7m2jmiaba7nbvv7vdwotnupe

Review of Electrochemical Capacitors Based on Carbon Nanotubes and Graphene

Jian Li, Xiaoqian Cheng, Alexey Shashurin, Michael Keidar
2012 Graphene  
progresses for electrochemical capacitors based on carbon nanotubes, graphene and their composites.  ...  This paper is focused on the application of carbon nanostructures in electrochemical capacitors, giving an overview regarding the basic mechanism, design, fabrication and achievement of latest research  ...  Acknowledgements Figure 1 . 1 Ragone plot for electrochemical energy storage devices: batteries, capacitors and electrochemical capacitors.  ... 
doi:10.4236/graphene.2012.11001 fatcat:oaomgvosl5cxbgodvd32e6jkau

Prediction of Charge-Discharge and Impedance Characteristics of Electric Double-Layer Capacitors Using Porous Electrode Theory

Muhammad R. Hasyim, Danhao Ma, Ramakrishnan Rajagopalan, Clive Randall
2017 Journal of the Electrochemical Society  
Furthermore, FDAM was used to validate the performance of a large-scale commercial EDLC capacitor.  ...  Among all non-faradaic phenomena related to the double layer structure, the diffuse layer is one of the most intensively studied.  ...  The CNT capacitor was tested in 1 M aqueous sulfuric acid using a polyvinyl alcohol (PVA) hydrogel membrane. 44 Cycling study was done on YP50-based EDLC which was cycled up to 10000 cycles at 1 A/g  ... 
doi:10.1149/2.0051713jes fatcat:djy5panbhrgthcltgiepwfj2wq

BioRadioTransmitter: A Self-Powered Wireless Glucose-Sensing System

Takuya Hanashi, Tomohiko Yamazaki, Wakako Tsugawa, Kazunori Ikebukuro, Koji Sode
2011 Journal of Diabetes Science and Technology  
We proposed a novel biosensor that we named BioCapacitor, in which a capacitor serves as a transducer.  ...  In this study, we constructed a new BioCapacitorbased system with an added radio-transmitter circuit and a miniaturized enzyme fuel cell.  ...  All components could be packaged together in a small device.  ... 
doi:10.1177/193229681100500502 pmid:22027294 pmcid:PMC3208857 fatcat:svoth4undbf7rgmi2223f74zme
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