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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
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Toward Practical Multivalent Ion Batteries with Quinone-Based Organic Cathodes.

Insu Hwang1, Dong-Uk Kim2, Jang Wook Choi1

  • 1School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, 1-Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.

ACS Applied Materials & Interfaces
|November 16, 2023
PubMed
Summary

Multivalent ion batteries offer high energy density. This review highlights quinone-based organic cathodes and the crucial role of identifying charge carriers for efficient energy storage in these advanced batteries.

Keywords:
Post lithium-ion batteriescharge carrierenergy densitymultivalent ion batteriesquinone-based organic cathodesrocking-chair mechanism

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Multivalent ion batteries are key for future energy demands, offering high energy density and socio-economic benefits.
  • Quinone-based organic compounds are promising cathode materials for multivalent ion batteries due to their structural and electrochemical properties.
  • Anion-based charge carriers in multivalent ion batteries often use a 'non-rocking-chair' mechanism, reducing energy density and requiring excess electrolyte.

Purpose of the Study:

  • To review quinone-based organic cathodes for multivalent ion batteries.
  • To categorize charge carriers used in multivalent ion battery studies.
  • To emphasize accurate charge carrier identification for energy density calculations.

Main Methods:

  • Literature review of multivalent ion battery research.
  • Categorization of charge carriers in reported studies.
  • Analysis of quinone-based organic cathode performance.

Main Results:

  • Quinone-based organic cathodes show potential for multivalent ion batteries.
  • The mechanism of charge carriers significantly impacts energy density.
  • Accurate identification of charge carriers is vital for performance evaluation.

Conclusions:

  • Quinone-based organic cathodes are viable for multivalent ion batteries.
  • Understanding charge carrier mechanisms is essential for optimizing energy density.
  • Future research should focus on practical realization and efficient energy storage solutions.