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Related Concept Videos

The Electrical Double Layer01:30

The Electrical Double Layer

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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...
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Electrolyte and Nonelectrolyte Solutions02:21

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Substances that undergo either a physical or a chemical change in solution to yield ions that can conduct electricity are called electrolytes. If a substance yields ions in solution, that is, if the compound undergoes 100% dissociation, then the substance is a strong electrolyte. Complete dissociation is indicated by a single forward arrow. For example, water-soluble ionic compounds like sodium chloride dissociate into sodium cations and chloride anions in aqueous solution.
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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Ionic Association01:28

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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.
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Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
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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...
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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A Long-Life Lithium Ion Battery with Enhanced Electrode/Electrolyte Interface by Using an Ionic Liquid Solution.

Giuseppe Antonio Elia1,2, Ulderico Ulissi3,4, Franziska Mueller3,4,5

  • 1Department of Chemistry, Sapienza University, Piazzale Aldo Moro 5, 00185, Rome, Italy.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|March 19, 2016
PubMed
Summary

This study presents a long-life lithium ion battery using a non-flammable ionic liquid electrolyte and advanced nanostructured electrodes. The battery demonstrates excellent stability and capacity retention, making it suitable for electric vehicles.

Keywords:
electrochemistryionic liquidslithium-ion batteriesnanostructures

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Developing advanced lithium ion batteries is crucial for electric vehicles.
  • Ionic liquid electrolytes offer potential safety and performance improvements over conventional electrolytes.
  • Nanostructured electrode materials can enhance battery capacity and cycle life.

Purpose of the Study:

  • To develop and characterize a novel long-life lithium ion battery.
  • To evaluate the performance of a non-flammable ionic liquid electrolyte with nanostructured electrodes.
  • To assess the suitability of this battery technology for electric vehicle applications.

Main Methods:

  • Utilized a Pyr14 TFSI-LiTFSI ionic liquid electrolyte.
  • Employed a nanostructured tin carbon (Sn-C) anode and a layered LiNi1/3 Co1/3 Mn1/3 O2 (NMC) cathode.
  • Conducted galvanostatic cycling, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM) for characterization.

Main Results:

  • The ionic liquid electrolyte exhibited a Vogel-Tammann-Fulcher (VTF) trend in conductivity and viscosity.
  • Full cells demonstrated stable capacity of ~140 mAh/g with over 99% retention after 400 cycles at 40°C.
  • Electrode/electrolyte interface stability was confirmed through EIS and SEM analysis.

Conclusions:

  • The developed ionic liquid-based lithium ion battery shows remarkable long-life performance.
  • The combination of the ionic liquid electrolyte and nanostructured electrodes is highly compatible.
  • This advanced battery technology is a promising candidate for electric vehicle applications.