Charge-Transfer Complexes for Solid-State Li+Conduction

Kan Hatakeyama-Sato; Momoka Umeki; Toshiki Tezuka; Kenichi Oyaizu

doi:10.1021/acsaelm.0c00393

Charge-Transfer Complexes for Solid-State Li⁺Conduction

Kan Hatakeyama-Sato, Momoka Umeki, Toshiki Tezuka, Kenichi Oyaizu^*

^*Corresponding author for this work

School of Advanced Science and Engineering

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Contradictory to the conventional understanding of solid-state ionics, we find that some organic crystals are highly ion conducting (>10-4 S/cm at room temperature). Through the microparticles of charge-transfer (CT) complexes, dissociated lithium ions move readily. Fast conduction is observed for a wide variety of compounds that form CT complexes, irrespective of the functional groups. Automatic relationship analysis via machine learning indicates the importance of polarization of the CT complexes for the ionic conduction. The decoupling system, where ion transport is not dominated by the segmental motion of media molecules, paves the way for achieving superionic properties in organic monomeric and polymeric conductors.

Original language	English
Pages (from-to)	2211-2217
Number of pages	7
Journal	ACS Applied Electronic Materials
Volume	2
Issue number	7
DOIs	https://doi.org/10.1021/acsaelm.0c00393
Publication status	Published - 2020 Jul 28

Keywords

charge-transfer complexes
lithium-ion batteries
organic electrochemistry
organic electrolytes
solid-state Liconductors

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Materials Chemistry
Electrochemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acsaelm.0c00393

Cite this

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title = "Charge-Transfer Complexes for Solid-State Li+Conduction",

abstract = "Contradictory to the conventional understanding of solid-state ionics, we find that some organic crystals are highly ion conducting (>10-4 S/cm at room temperature). Through the microparticles of charge-transfer (CT) complexes, dissociated lithium ions move readily. Fast conduction is observed for a wide variety of compounds that form CT complexes, irrespective of the functional groups. Automatic relationship analysis via machine learning indicates the importance of polarization of the CT complexes for the ionic conduction. The decoupling system, where ion transport is not dominated by the segmental motion of media molecules, paves the way for achieving superionic properties in organic monomeric and polymeric conductors. ",

keywords = "charge-transfer complexes, lithium-ion batteries, organic electrochemistry, organic electrolytes, solid-state Liconductors",

author = "Kan Hatakeyama-Sato and Momoka Umeki and Toshiki Tezuka and Kenichi Oyaizu",

note = "Funding Information: This work was partially supported by Grants-in-Aid for Scientific Research (Nos. 17H03072, 18K19120, 18H05515, 20H05298, and 19K15638) from MEXT, Japan. This work was partially supported by the Research Institute for Science and Engineering. Publisher Copyright: {\textcopyright} 2020 American Chemical Society.",

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AU - Hatakeyama-Sato, Kan

AU - Umeki, Momoka

AU - Tezuka, Toshiki

AU - Oyaizu, Kenichi

N1 - Funding Information: This work was partially supported by Grants-in-Aid for Scientific Research (Nos. 17H03072, 18K19120, 18H05515, 20H05298, and 19K15638) from MEXT, Japan. This work was partially supported by the Research Institute for Science and Engineering. Publisher Copyright: © 2020 American Chemical Society.

PY - 2020/7/28

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N2 - Contradictory to the conventional understanding of solid-state ionics, we find that some organic crystals are highly ion conducting (>10-4 S/cm at room temperature). Through the microparticles of charge-transfer (CT) complexes, dissociated lithium ions move readily. Fast conduction is observed for a wide variety of compounds that form CT complexes, irrespective of the functional groups. Automatic relationship analysis via machine learning indicates the importance of polarization of the CT complexes for the ionic conduction. The decoupling system, where ion transport is not dominated by the segmental motion of media molecules, paves the way for achieving superionic properties in organic monomeric and polymeric conductors.

AB - Contradictory to the conventional understanding of solid-state ionics, we find that some organic crystals are highly ion conducting (>10-4 S/cm at room temperature). Through the microparticles of charge-transfer (CT) complexes, dissociated lithium ions move readily. Fast conduction is observed for a wide variety of compounds that form CT complexes, irrespective of the functional groups. Automatic relationship analysis via machine learning indicates the importance of polarization of the CT complexes for the ionic conduction. The decoupling system, where ion transport is not dominated by the segmental motion of media molecules, paves the way for achieving superionic properties in organic monomeric and polymeric conductors.

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KW - lithium-ion batteries

KW - organic electrochemistry

KW - organic electrolytes

KW - solid-state Liconductors

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