Fabrication of a cyanide-bridged coordination polymer electrode for enhanced electrochemical ion storage ability

Daisuke Asakura; Masashi Okubo; Yoshifumi Mizuno; Tetsuichi Kudo; Haoshen Zhou; Kazumichi Ikedo; Takashi Mizokawa; Atsushi Okazawa; Norimichi Kojima

doi:10.1021/jp2118949

Fabrication of a cyanide-bridged coordination polymer electrode for enhanced electrochemical ion storage ability

Daisuke Asakura, Masashi Okubo^*, Yoshifumi Mizuno, Tetsuichi Kudo, Haoshen Zhou, Kazumichi Ikedo, Takashi Mizokawa, Atsushi Okazawa, Norimichi Kojima

^*Corresponding author for this work

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

98 Citations (Scopus)

Abstract

Host frameworks with the ability to store guest ions are very important in a wide range of applications including electrode materials for Li-ion batteries. In this report, we demonstrate that the ion storage ability of the cyanide-bridged coordination polymer (Prussian blue analogue, PBA) can be enhanced by suppressing vacancy formation. K-ions in the vacancy-suppressed PBA framework K _1.72Mn[Mn(CN) ₆] _0.93·□ _0.07·0.65H ₂O (□: a [Mn(CN) ₆] ^4- defect) were electrochemically extracted. The open circuit voltages (OCVs) during K-ion extraction exhibited two specific plateaus at 3.0 and 3.7 V vs Li/Li ⁺. Ex situ X-ray diffraction and IR spectroscopy revealed drastic structural and electronic changes during K-ion extraction. Furthermore, after K-ion extraction, the vacancy-suppressed PBA framework was applied to the cathode material for a Li-ion battery. The charge/discharge experiments revealed that the framework can accommodate a large amount of Li-ions.

Original language	English
Pages (from-to)	8364-8369
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	116
Issue number	15
DOIs	https://doi.org/10.1021/jp2118949
Publication status	Published - 2012 Apr 19
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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title = "Fabrication of a cyanide-bridged coordination polymer electrode for enhanced electrochemical ion storage ability",

abstract = "Host frameworks with the ability to store guest ions are very important in a wide range of applications including electrode materials for Li-ion batteries. In this report, we demonstrate that the ion storage ability of the cyanide-bridged coordination polymer (Prussian blue analogue, PBA) can be enhanced by suppressing vacancy formation. K-ions in the vacancy-suppressed PBA framework K 1.72Mn[Mn(CN) 6] 0.93·□ 0.07·0.65H 2O (□: a [Mn(CN) 6] 4- defect) were electrochemically extracted. The open circuit voltages (OCVs) during K-ion extraction exhibited two specific plateaus at 3.0 and 3.7 V vs Li/Li +. Ex situ X-ray diffraction and IR spectroscopy revealed drastic structural and electronic changes during K-ion extraction. Furthermore, after K-ion extraction, the vacancy-suppressed PBA framework was applied to the cathode material for a Li-ion battery. The charge/discharge experiments revealed that the framework can accommodate a large amount of Li-ions.",

author = "Daisuke Asakura and Masashi Okubo and Yoshifumi Mizuno and Tetsuichi Kudo and Haoshen Zhou and Kazumichi Ikedo and Takashi Mizokawa and Atsushi Okazawa and Norimichi Kojima",

year = "2012",

month = apr,

day = "19",

doi = "10.1021/jp2118949",

language = "English",

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journal = "Journal of Physical Chemistry C",

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T1 - Fabrication of a cyanide-bridged coordination polymer electrode for enhanced electrochemical ion storage ability

AU - Asakura, Daisuke

AU - Okubo, Masashi

AU - Mizuno, Yoshifumi

AU - Kudo, Tetsuichi

AU - Zhou, Haoshen

AU - Ikedo, Kazumichi

AU - Mizokawa, Takashi

AU - Okazawa, Atsushi

AU - Kojima, Norimichi

PY - 2012/4/19

Y1 - 2012/4/19

N2 - Host frameworks with the ability to store guest ions are very important in a wide range of applications including electrode materials for Li-ion batteries. In this report, we demonstrate that the ion storage ability of the cyanide-bridged coordination polymer (Prussian blue analogue, PBA) can be enhanced by suppressing vacancy formation. K-ions in the vacancy-suppressed PBA framework K 1.72Mn[Mn(CN) 6] 0.93·□ 0.07·0.65H 2O (□: a [Mn(CN) 6] 4- defect) were electrochemically extracted. The open circuit voltages (OCVs) during K-ion extraction exhibited two specific plateaus at 3.0 and 3.7 V vs Li/Li +. Ex situ X-ray diffraction and IR spectroscopy revealed drastic structural and electronic changes during K-ion extraction. Furthermore, after K-ion extraction, the vacancy-suppressed PBA framework was applied to the cathode material for a Li-ion battery. The charge/discharge experiments revealed that the framework can accommodate a large amount of Li-ions.

AB - Host frameworks with the ability to store guest ions are very important in a wide range of applications including electrode materials for Li-ion batteries. In this report, we demonstrate that the ion storage ability of the cyanide-bridged coordination polymer (Prussian blue analogue, PBA) can be enhanced by suppressing vacancy formation. K-ions in the vacancy-suppressed PBA framework K 1.72Mn[Mn(CN) 6] 0.93·□ 0.07·0.65H 2O (□: a [Mn(CN) 6] 4- defect) were electrochemically extracted. The open circuit voltages (OCVs) during K-ion extraction exhibited two specific plateaus at 3.0 and 3.7 V vs Li/Li +. Ex situ X-ray diffraction and IR spectroscopy revealed drastic structural and electronic changes during K-ion extraction. Furthermore, after K-ion extraction, the vacancy-suppressed PBA framework was applied to the cathode material for a Li-ion battery. The charge/discharge experiments revealed that the framework can accommodate a large amount of Li-ions.

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Fabrication of a cyanide-bridged coordination polymer electrode for enhanced electrochemical ion storage ability

Abstract

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