Lithium intercalation behavior into iron cyanide complex as positive electrode of lithium secondary battery |
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| Affiliation: | 1. Department of Chemistry, Mie University, 1515 Kamihama-cho, Tsu, Mie 514, Japan;2. Nippon Glass Fiber, 4902 Komori-cho, Takachaya, Tsu, Mie 514, Japan;1. Chemistry Department and Centre for Material Science and Nanotechnology, University of Oslo, Norway;2. College of Engineering, Swansea University, Swansea SA2 8PP, UK;3. Swiss–Norwegian Beamlines, European Synchrotron, Grenoble, France;1. State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA;1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China;2. State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin, China;3. State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China |
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| Abstract: | Lithium intercalation of iron cyanide Prussian blue, Fe4[Fe(CN)6]3·xH2O, 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 Fe3+ ions were necessary for the lithium intercalation and their removal by drying beyond 200°C led to a significant capacity decrease. |
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