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

Research output: Contribution to journalArticle

64 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 languageEnglish
Pages (from-to)8364-8369
Number of pages6
JournalJournal of Physical Chemistry C
Volume116
Issue number15
DOIs
Publication statusPublished - 2012 Apr 19
Externally publishedYes

Fingerprint

ion storage
Cyanides
cyanides
coordination polymers
Polymers
ion extraction
Ions
Fabrication
Electrodes
fabrication
electrodes
analogs
ions
Vacancies
electric batteries
electrode materials
open circuit voltage
plateaus
Open circuit voltage
cathodes

ASJC Scopus subject areas

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

Cite this

Fabrication of a cyanide-bridged coordination polymer electrode for enhanced electrochemical ion storage ability. / Asakura, Daisuke; Okubo, Masashi; Mizuno, Yoshifumi; Kudo, Tetsuichi; Zhou, Haoshen; Ikedo, Kazumichi; Mizokawa, Takashi; Okazawa, Atsushi; Kojima, Norimichi.

In: Journal of Physical Chemistry C, Vol. 116, No. 15, 19.04.2012, p. 8364-8369.

Research output: Contribution to journalArticle

Asakura, D, Okubo, M, Mizuno, Y, Kudo, T, Zhou, H, Ikedo, K, Mizokawa, T, Okazawa, A & Kojima, N 2012, 'Fabrication of a cyanide-bridged coordination polymer electrode for enhanced electrochemical ion storage ability', Journal of Physical Chemistry C, vol. 116, no. 15, pp. 8364-8369. https://doi.org/10.1021/jp2118949
Asakura, Daisuke ; Okubo, Masashi ; Mizuno, Yoshifumi ; Kudo, Tetsuichi ; Zhou, Haoshen ; Ikedo, Kazumichi ; Mizokawa, Takashi ; Okazawa, Atsushi ; Kojima, Norimichi. / Fabrication of a cyanide-bridged coordination polymer electrode for enhanced electrochemical ion storage ability. In: Journal of Physical Chemistry C. 2012 ; Vol. 116, No. 15. pp. 8364-8369.
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