Lithium intercalation behavior into iron cyanide complex as positive electrode of lithium secondary battery

• Published in: Journal of power sources Vol. 79; no. 2; pp. 215 - 219
• Main Authors: Imanishi, N., Morikawa, T., Kondo, J., Takeda, Y., Yamamoto, O., Kinugasa, N., Yamagishi, T.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 1999; Elsevier Sequoia
• Subjects: Applied sciences; Complex; 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; Lithium ion battery; Prussian blue; Lithium ion battery; Prussian blue; Intercalation; Complex; Intercalation compound; Iron Cyanides; Anode; Battery; Lithium; Secondary cell; Electrode material
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/S0378-7753(99)00061-0

Lithium intercalation of iron cyanide Prussian blue, Fe
4[Fe(CN)
6]
3·
xH
2O, in an aprotic media was examined in regard to the water content inside the lattice. Prussian blue showed reversible lithium intercalation potential around 3 V vs. Li, which corresponds to a redox of iron ions. Two types of water molecules were contained in the structure, one of which called zeolitic water has little effect on lithium intercalation and the theoretical capacity was always observed regardless of its amount. Other coordinating water molecules surrounding Fe
3+ ions were necessary for the lithium intercalation and their removal by drying beyond 200°C led to a significant capacity decrease.