Lithium intercalation behavior of iron cyanometallates

• Published in: Journal of power sources Vol. 81; pp. 530 - 534
• Main Authors: Imanishi, N., Morikawa, T., Kondo, J., Yamane, R., Takeda, Y., Yamamoto, O., Sakaebe, H., Tabuchi, M.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 01-09-1999; Elsevier Sequoia
• Subjects: Applied sciences; Cyanometallate; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Intercalation; Multinuclear complex; Prussian blue; Prussian blue; Intercalation; Cyanometallate; Multinuclear complex; Intercalation compound; Metallates; Iron complex; Battery; Lithium; Secondary cell; Nickel; Electrode material; Copper; Cobalt; Cyano complex; Manganese
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/S0378-7753(98)00228-6

Iron cyanometallates having a formula, M
6−
m
n+
[Fe
m+
(CN)
6]
n
(M=V, Mn, Co, Ni, Cu) were prepared and their charge–discharge behavior was discussed. In the V–Fe complex, average discharge potential is about 3.6 V corresponding to reduction of V
3+, whereas the Mn, Co, Ni, and Cu complexes show similar discharge potential around 3.3 V that is resulted from reduction of [Fe
3+(CN)
6]
3− unit in the lattice. The specific capacity of V, Mn, Co, Ni complexes show about 60–80 mA h g
−1, but copper complex indicates almost double capacity, ca. 140 mA h g
−1. This is explained by considering the capacity caused by Cu
2+ to Cu
+ reduction in addition to [Fe
3+(CN)
6]
3−→[Fe
2+(CN)
6]
4− reduction.