scholarly journals Fabrication of Electrochromic Devices Using Double Layer Conducting Polymers for Infrared Transmittance Control

2014 ◽  
Vol 3 (2) ◽  
pp. 32-34
Author(s):  
Jin Kyu Kim ◽  
Jong Kwan Koh ◽  
Bumsoo Kim ◽  
Seokwoo Jeon ◽  
Joonmo Ahn ◽  
...  
Keyword(s):  
Conducting Polymers ◽  
Double Layer ◽  
Electrochromic Devices ◽  
Infrared Transmittance

scholarly journals Color Tuning by Oxide Addition in PEDOT:PSS-Based Electrochromic Devices

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 179 ◽  
Author(s):  
Delphin Levasseur ◽  
Issam Mjejri ◽  
Thomas Rolland ◽  
Aline Rougier
Keyword(s):  
Thin Films ◽  
Iron Oxide ◽  
Conducting Polymers ◽  
Applied Voltage ◽  
Oxide Content ◽  
Electrochromic Devices ◽  
Careful Evaluation ◽  
Pedot Film ◽  
Oxide Addition ◽  
Dark Blue

Poly(3,4-ethylenedi-oxythiophene) (PEDOT) derivatives conducting polymers are known for their great electrochromic (EC) properties offering a reversible blue switch under an applied voltage. Characterizations of symmetrical EC devices, built on combinations of PEDOT thin films, deposited with a bar coater from commercial inks, and separated by a lithium-based ionic membrane, show highest performance for 800 nm thickness. Tuning of the color is further achieved by mixing the PEDOT film with oxides. Taking, in particular, the example of optically inactive iron oxide Fe2O3, a dark blue to reddish switch, of which intensity depends on the oxide content, is reported. Careful evaluation of the chromaticity parameters L*, a*, and b*, with oxidizing/reducing potentials, evidences a possible monitoring of the bluish tint.

scholarly journals The intrinsic volumetric capacitance of conducting polymers: pseudo-capacitors or double-layer supercapacitors?

RSC Advances ◽  
2019 ◽  
Vol 9 (72) ◽  
pp. 42498-42508 ◽  
Author(s):  
Ihor Sahalianov ◽  
Sandeep Kumar Singh ◽  
Klas Tybrandt ◽  
Magnus Berggren ◽  
Igor Zozoulenko
Keyword(s):  
Density Functional Theory ◽  
Conducting Polymers ◽  
Double Layer ◽  
Density Functional ◽  
Functional Theory ◽  
The Density Functional Theory ◽  
Volumetric Capacitance

Using the density functional theory, the intrinsic volumetric capacitance of conducting polymers is calculated. It is shown that conducting polymers operate as double-layer supercapacitors rather than pseudo-capacitors.

Further understanding of the mechanisms of electrochromic devices with variable infrared emissivity based on polyaniline conducting polymers

2019 ◽  
Vol 7 (32) ◽  
pp. 9878-9891 ◽  
Author(s):  
Leipeng Zhang ◽  
Bo Wang ◽  
Xiaobai Li ◽  
Gaoping Xu ◽  
Shuliang Dou ◽  
...  
Keyword(s):  
Conducting Polymers ◽  
Thermal Management ◽  
Electrical Energy ◽  
Infrared Emissivity ◽  
Electrochromic Devices ◽  
Considerable Potential ◽  
Management Application ◽  
The Future ◽  
Potential Use

Adaptive infrared (IR) electrochromic devices driven by electrical energy have considerable potential use in intelligent IR thermal management application in the future.

scholarly journals The Effect of Modifications of Activated Carbon Materials on the Capacitive Performance: Surface, Microstructure, and Wettability

2021 ◽  
Vol 5 (3) ◽  
pp. 66
Author(s):  
Kouao Dujearic-Stephane ◽  
Meenal Gupta ◽  
Ashwani Kumar ◽  
Vijay Sharma ◽  
Soumya Pandit ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Metal Oxide ◽  
Conducting Polymers ◽  
Surface Chemistry ◽  
Double Layer ◽  
Carbon Materials ◽  
Operating Voltage ◽  
Additional Contribution ◽  
Equivalent Series Resistance ◽  
Oxide Materials

In this review, the efforts done by different research groups to enhance the performance of the electric double-layer capacitors (EDLCs), regarding the effect of the modification of activated carbon structures on the electrochemical properties, are summarized. Activated carbon materials with various porous textures, surface chemistry, and microstructure have been synthesized using several different techniques by different researchers. Micro-, meso-, and macroporous textures can be obtained through the activation/carbonization process using various activating agents. The surface chemistry of activated carbon materials can be modified via: (i) the carbonization of heteroatom-enriched compounds, (ii) post-treatment of carbon materials with reactive heteroatom sources, and (iii) activated carbon combined both with metal oxide materials dan conducting polymers to obtain composites. Intending to improve the EDLCs performance, the introduction of heteroatoms into an activated carbon matrix and composited activated carbon with either metal oxide materials or conducting polymers introduced a pseudo-capacitance effect, which is an additional contribution to the dominant double-layer capacitance. Such tricks offer high capacitance due to the presence of both electrical double layer charge storage mechanism and faradic charge transfer. The surface modification by attaching suitable heteroatoms such as phosphorus species increases the cell operating voltage, thereby improving the cell performance. To establish a detailed understanding of how one can modify the activated carbon structure regarding its porous textures, the surface chemistry, the wettability, and microstructure enable to enhance the performance of the EDLCs is discussed here in detail. This review discusses the basic key parameters which are considered to evaluate the performance of EDLCs such as cell capacitance, operating voltage, equivalent series resistance, power density, and energy density, and how these are affected by the modification of the activated carbon framework.

scholarly journals Modulation of the electrical double layer in metals and conducting polymers

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Jorge Morgado
Keyword(s):  
Electric Field ◽  
Conducting Polymers ◽  
Conjugated Polymers ◽  
Double Layer ◽  
Electrical Double Layer ◽  
Conductive Substrate ◽  
Long Time ◽  
Living Tissues ◽  
Application Fields ◽  
Deep Brain

AbstractThe electrical double layer (EDL) formed at the interface between various materials and an electrolyte has been studied for a long time. In particular, the EDL formed at metal/electrolyte interfaces is central in electrochemistry, with a plethora of applications ranging from corrosion to batteries to sensors. The discovery of highly conductive conjugated polymers has opened a new area of electronics, involving solution-based or solution-interfaced devices, and in particular in bioelectronics, namely for use in deep-brain stimulation electrodes and devices to measure and condition cells activity, as these materials offer new opportunities to interface cells and living tissues. Here, it is shown that the potential associated to the double layer formed at the interface between either metals or conducting polymers and electrolytes is modified by the application of an electric field along the conductive substrate. The EDL acts as a transducer of the electric field applied to the conductive substrate. This observation has profound implications in the modelling and operation of devices relying on interfaces between conductive materials (metals and conjugated polymers) and electrolytes, which encompasses various application fields ranging from medicine to electronics.

Polymer-Based Electrochemical Devices

1992 ◽  
Vol 293 ◽  
Author(s):  
C. Arbizzani ◽  
M. Mastragostino ◽  
L. Meneghello ◽  
X. Andrieu ◽  
T. Vicedo
Keyword(s):  
Conducting Polymers ◽  
Polymer Electrolyte ◽  
Light Transmission ◽  
Polymer Network ◽  
Electrochromic Devices ◽  
Electrochromic Materials ◽  
Testing Data ◽  
Electrochemical Devices ◽  
Electronically Conducting Polymers ◽  
Variable Light

AbstractSelected findings of ongoing investigations of variable light-transmission electrochromic devices using electronically conducting polymers as electrochromic materials are presented and discussed.An obvious requisite for electrochromic windows is an all-solid configuration with polymer electrolyte; in this connection testing data of a new hybrid electrolyte based on a polymer network including a plasticizer are reported and discussed.

Characterization by Atomic Force Microscopy of Electrodeposited Films of Polypyrrole Dinitrobenzoyl-derivative

2005 ◽  
Vol 11 (S03) ◽  
pp. 146-149 ◽  
Author(s):  
A. S. Ribeiro ◽  
L. M. de O. Ribeiro ◽  
J. G. Silva Jr. ◽  
M. Navarro ◽  
J. Tonholo
Keyword(s):  
Atomic Force Microscopy ◽  
Conducting Polymers ◽  
Conducting Polymer ◽  
Gas Sensors ◽  
Practical Application ◽  
Electrochromic Devices ◽  
Force Microscopy ◽  
Atomic Force ◽  
Considerable Research ◽  
The Subject

Although the development of conducting polymers is very recent, such materials have already been shown to possess a number of useful properties that may be exploited in a range of technological applications. In particular, the representative conducting polymer polypyrrole (PPy) has been the subject of considerable research interest owing to its facile polymerisation and practical application in products as diverse as gas sensors [1], electrochromic devices [2] and battery / capacitor components [3].

Electronic structure studies of conducting polymers by electron energy-loss spectroscopy

1996 ◽  
Vol 54 ◽  
pp. 160-161
Author(s):  
J. Fink
Keyword(s):  
Electronic Structure ◽  
Conducting Polymers ◽  
Conjugated Polymers ◽  
Electron Acceptors ◽  
Electron Donors ◽  
Light Emitting ◽  
One Dimensional ◽  
New Class ◽  
Electrical Conductivities ◽  
Electron Energy Loss

Conducting polymers comprises a new class of materials achieving electrical conductivities which rival those of the best metals. The parent compounds (conjugated polymers) are quasi-one-dimensional semiconductors. These polymers can be doped by electron acceptors or electron donors. The prototype of these materials is polyacetylene (PA). There are various other conjugated polymers such as polyparaphenylene, polyphenylenevinylene, polypoyrrole or polythiophene. The doped systems, i.e. the conducting polymers, have intersting potential technological applications such as replacement of conventional metals in electronic shielding and antistatic equipment, rechargable batteries, and flexible light emitting diodes.Although these systems have been investigated almost 20 years, the electronic structure of the doped metallic systems is not clear and even the reason for the gap in undoped semiconducting systems is under discussion.

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