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Related Concept Videos

Ionic Association01:28

Ionic Association

46
The ionic association is the association of oppositely charged ions in an electrolyte solution to form ion pairs. Bjerrum defined ion pairs as two oppositely charged ions whose electrostatic attraction exceeds the thermal energy of the system, typically expressed as 2kT. Electrostatic attraction depends on ionic charge, separation distance, and the dielectric constant of the medium. Thermal energy, represented by kT, reflects the tendency of ions to move independently due to molecular motion.
46
Ion Exchange01:17

Ion Exchange

1.5K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.5K
Theory of Strong Electrolytes01:23

Theory of Strong Electrolytes

46
The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...
46
Electrochemical Systems01:24

Electrochemical Systems

49
Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution,...
49
The Electrical Double Layer01:30

The Electrical Double Layer

97
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
97
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

942
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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An Organic Mixed Ion-Electron Conductor for Power Electronics.

Abdellah Malti1, Jesper Edberg1, Hjalmar Granberg2

  • 1Laboratory of Organic Electronics Department of Science and Technology Linköping University SE-601 74 Norrköping Sweden.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|October 25, 2016
PubMed
Summary

Researchers developed a novel conductive nanopaper using cellulose and a polymer blend. This material achieves record capacitance in supercapacitors and transconductance in electrochemical transistors, paving the way for advanced energy storage and electronics.

Keywords:
PEDOTconducting polymernanofibrillated cellulosesupercapacitortransconductance

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Developing advanced materials for energy storage and electronic devices is crucial.
  • Mixed ionic-electronic conductors offer unique properties for electrochemical applications.

Purpose of the Study:

  • To demonstrate a novel mixed ionic-electronic conductor based on nanofibrillated cellulose.
  • To explore the potential of this material in bulky electrochemical devices.

Main Methods:

  • Compositing nanofibrillated cellulose with poly(3,4-ethylene-dioxythio-phene):poly(styrene-sulfonate).
  • Incorporating high boiling point solvents into the composite.
  • Fabricating bulky electrochemical devices using the resulting nanopaper.

Main Results:

  • The developed nanopaper exhibits high electronic and ionic conductivities.
  • Supercapacitors utilizing this material achieved record charge storage capacitance (1F).
  • Electrochemical transistors demonstrated record transconductance (1S).

Conclusions:

  • The cellulose-based mixed conductor is a promising material for high-performance supercapacitors and electrochemical transistors.
  • The material's properties enable record-breaking performance in energy storage and electronic devices.