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Related Concept Videos

Crown Ethers02:36

Crown Ethers

Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by Charles Pederson while working at DuPont in 1967. For this work, Pedersen was co-awarded the 1987 Nobel Prize in Chemistry. Crown ethers are named using the formula x-crown-y, where x is the total number of atoms in the ring and y is the number of ether oxygen atoms. The term 'crown' refers to the crown-like shape that these ether molecules take.
Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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...
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene01:13

Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene

Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.

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Related Experiment Video

Updated: May 12, 2026

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
11:04

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

Fluoroalkyl-functionalized cyclic ethers as solvent for high-voltage batteries.

Ke-Hsin Wang1, Ritesh Kumar1, Peiyuan Ma1

  • 1Pritzker School of Molecular Engineering, University of Chicago, IL 60637, USA. chibueze@uchicago.edu.

Chemical Communications (Cambridge, England)
|May 11, 2026
PubMed
Summary

New cyclic ethers enhance high voltage lithium metal batteries by improving conductivity and stability. These fluorinated compounds enable long-term cycling with advanced cathodes, overcoming limitations of linear ethers.

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Last Updated: May 12, 2026

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Published on: December 20, 2016

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Failure Analysis of Batteries Using Synchrotron-based Hard X-ray Microtomography
08:11

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Published on: August 26, 2015

Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Lithium metal batteries (LMBs) are crucial for next-generation energy storage.
  • High voltage operation in LMBs requires electrolytes with enhanced oxidative stability.
  • Linear fluorinated ethers have shown promise but face challenges in conductivity and stability.

Purpose of the Study:

  • To investigate a novel class of side-chain-fluorinated cyclic ethers as electrolytes for high voltage LMBs.
  • To compare the performance of these cyclic ethers against traditional linear fluorinated ethers.
  • To elucidate the structure-property relationships governing electrolyte performance.

Main Methods:

  • Synthesis and characterization of novel side-chain-fluorinated cyclic ethers.
  • Electrochemical testing, including ionic conductivity measurements and cyclic voltammetry.
  • Long-term cycling performance evaluation with LiNi0.8Mn0.1Co0.1O2 (NMC811) cathodes.

Main Results:

  • Cyclic ethers demonstrated higher ionic conductivity compared to linear counterparts, despite increased ion pairing.
  • Enhanced fluorination effectively suppressed solvent polymerization and improved oxidative stability.
  • Long-term cycling with NMC811 cathodes showed significant improvements in stability and lifespan.

Conclusions:

  • Side-chain-fluorinated cyclic ethers represent a promising electrolyte alternative for high voltage lithium metal batteries.
  • These electrolytes offer a superior balance of ionic conductivity, oxidative stability, and compatibility with high-energy cathodes.
  • Further development of fluorinated cyclic ethers could accelerate the commercialization of advanced lithium metal battery technologies.