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Related Concept Videos

Ionic Bonds00:42

Ionic Bonds

118.2K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
118.2K
Ion Exchange01:17

Ion Exchange

574
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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Ionic Compounds: Formulas and Nomenclature03:34

Ionic Compounds: Formulas and Nomenclature

66.8K
An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to produce ions through complete electron transfer. The compound formed by this transfer is stabilized by the electrostatic attractions (ionic bonds) between the oppositely charged ions.
66.8K
Reactivity of Enolate Ions01:23

Reactivity of Enolate Ions

2.5K
Enolate ions are formed by the acid–base reaction of a carbonyl compound with a base. This leads to deprotonation of the α hydrogen atom, leading to a resonance-stabilized enolate ion where one of the contributing structures is an oxyanion, which imparts additional stability. Therefore, the proton on the α carbon is more acidic in nature than that of other sp3-hybridized C–H bonds but less acidic than those in O–H bonds where the negative charge in the conjugate...
2.5K
Alkylation of β-Diester Enolates: Malonic Ester Synthesis01:14

Alkylation of β-Diester Enolates: Malonic Ester Synthesis

3.4K
Malonic ester synthesis is a method to obtain α substituted carboxylic acids from ꞵ-diesters such as diethyl malonate and alkyl halides.
3.4K
Ions as Acids and Bases02:54

Ions as Acids and Bases

23.7K
Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
23.7K

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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Carboxylate ester-based electrolytes for Na-ion batteries.

Yunan Qin1, Seong-Gyu Choi1, Lucia Mason1

  • 1Department of Chemical Engineering, University of Utah Salt Lake City 84114 Utah USA taogao@chemeng.utah.edu.

Chemical Science
|June 21, 2024
PubMed
Summary

Carboxylate ester electrolytes show promise for low-temperature sodium-ion batteries (SIBs) by improving conductivity. However, electrolyte stability requires careful selection of anions and salt concentration to form a protective interphase.

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Sodium-ion batteries (SIBs) are crucial for next-generation energy storage.
  • Low-temperature performance of SIBs is hindered by high electrolyte resistance.
  • Current carbonate-based electrolytes face limitations in extreme temperature conditions.

Purpose of the Study:

  • To evaluate carboxylate ester-based electrolytes for improved SIB performance, especially at low temperatures.
  • To investigate the impact of salt, concentration, and solvent structure on electrolyte properties.
  • To compare carboxylate ester electrolytes with traditional carbonate-based systems.

Main Methods:

  • Systematic electrochemical testing of carboxylate ester electrolytes in hard carbon/Na and Na3V2(PO4)3/Na half-cells.
  • Spectroscopic characterization to analyze electrolyte behavior and interphase formation.
  • Comparative analysis with carbonate-based electrolytes under varying conditions.

Main Results:

  • Carboxylate ester electrolytes exhibit high ionic conductivity, particularly at low temperatures.
  • These electrolytes demonstrate potential for enhanced SIB performance.
  • Optimizing anion choice and salt concentration is critical for forming a stable solid electrolyte interphase (SEI).

Conclusions:

  • Carboxylate ester-based electrolytes offer a viable alternative for low-temperature SIB applications.
  • Understanding the chemistry-property-performance correlation is key for further electrolyte engineering.
  • This study provides foundational knowledge for developing advanced SIB electrolytes.