Anisotropic Li+ ion conductivity in a large single crystal of a Co(III) coordination complex

Saet Byeol Kim; Jeung Yoon Kim; Nak Cheon Jeong; Kang Min Ok

doi:10.1039/c6qi00314a

Anisotropic Li⁺ ion conductivity in a large single crystal of a Co(III) coordination complex

Saet Byeol Kim, Jeung Yoon Kim, Nak Cheon Jeong, Kang Min Ok

Department of Physics and Chemistry

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

13 Scopus citations

Abstract

Large single crystals of a novel lithium cobalt coordination compound, LiCo(NC₅H₃(CO₂)₂)₂(H₂O)_2.125 [LiCo(PDC)₂] were grown via a hydrothermal reaction in high yield. The electrochemical impedance spectroscopy (EIS) data measured on a large single crystal of LiCo(PDC)₂ revealed very interesting anisotropic Li⁺ ion conductivity. The redox potential for Co³⁺/Co⁴⁺ observed at ca. 200 mV in the cyclic voltammogram was consistent with the electric potential where the ionic conductivity occurred. Detailed structural analysis on a series of stoichiometrically equivalent cobalt coordination compounds, ACo(PDC)₂ (A = Na⁺, K⁺, and H₃O⁺), indicated that the presence of ion channels as well as a suitable cation size is critical for the anisotropic ionic conductivity.

Original language	English
Pages (from-to)	79-83
Number of pages	5
Journal	Inorganic Chemistry Frontiers
Volume	4
Issue number	1
DOIs	https://doi.org/10.1039/c6qi00314a
State	Published - Jan 2017

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title = "Anisotropic Li+ ion conductivity in a large single crystal of a Co(III) coordination complex",

abstract = "Large single crystals of a novel lithium cobalt coordination compound, LiCo(NC5H3(CO2)2)2(H2O)2.125 [LiCo(PDC)2] were grown via a hydrothermal reaction in high yield. The electrochemical impedance spectroscopy (EIS) data measured on a large single crystal of LiCo(PDC)2 revealed very interesting anisotropic Li+ ion conductivity. The redox potential for Co3+/Co4+ observed at ca. 200 mV in the cyclic voltammogram was consistent with the electric potential where the ionic conductivity occurred. Detailed structural analysis on a series of stoichiometrically equivalent cobalt coordination compounds, ACo(PDC)2 (A = Na+, K+, and H3O+), indicated that the presence of ion channels as well as a suitable cation size is critical for the anisotropic ionic conductivity.",

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AU - Kim, Saet Byeol

AU - Kim, Jeung Yoon

AU - Jeong, Nak Cheon

AU - Ok, Kang Min

PY - 2017/1

Y1 - 2017/1

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AB - Large single crystals of a novel lithium cobalt coordination compound, LiCo(NC5H3(CO2)2)2(H2O)2.125 [LiCo(PDC)2] were grown via a hydrothermal reaction in high yield. The electrochemical impedance spectroscopy (EIS) data measured on a large single crystal of LiCo(PDC)2 revealed very interesting anisotropic Li+ ion conductivity. The redox potential for Co3+/Co4+ observed at ca. 200 mV in the cyclic voltammogram was consistent with the electric potential where the ionic conductivity occurred. Detailed structural analysis on a series of stoichiometrically equivalent cobalt coordination compounds, ACo(PDC)2 (A = Na+, K+, and H3O+), indicated that the presence of ion channels as well as a suitable cation size is critical for the anisotropic ionic conductivity.

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Anisotropic Li⁺ ion conductivity in a large single crystal of a Co(III) coordination complex

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