EQCM analysis of redox behavior of CuFe Prussian blue analog in Mg battery electrolytes

Shunsuke Yagi, Masaaki Fukuda, Tetsu Ichitsubo, Kiyofumi Nitta, Masaichiro Mizumaki, Eiichiro Matsubara

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)


A wide variety of ions and molecules can be accommodated in the framework structure of Prussian blue (PB) and its analogs (PBAs). Mono- and polyvalent ions accommodated in the PB framework structure and PBAs can be extracted or re-inserted by redox reactions of transition metal ions composing the framework for charge compensation. In the present work, we report the detailed mechanism of the electrochemical inseration/extraction of Mg2+ ions and the effect of anions on the redox chemistry of a PBA composed of Cu and Fe ions by electrochemical quartz crystal microbalance and X-ray absorption spectroscopy. Furthermore, we evaluated the PBA as an active material using aqueous and organic electrolytes for Mg battery systems, and clarified that the redox potential of CuFe-PBA is approximately 3 V vs. Mg/Mg2+ in both aqueous and organic electrolytes.

Original languageEnglish
Pages (from-to)A2356-A2361
JournalJournal of the Electrochemical Society
Issue number12
Publication statusPublished - 2015


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