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AssigneeKyushu University, National University Corporation
InventorsShigeto Okada, Ayuko Kitajou, Hideyuki Komatsu, Irina D. Gocheva, Kuniko Chihara, Junichi Yamaki
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Provided is a technology for producing a positive electrode active substance mainly composed of FeOF having a sufficient charge-discharge capacity, in the short-time and easy manner. Also provided is a positive electrode active substance mainly composed of FeOF. The method for producing the positive electrode active substance mainly composed of FeOF comprises the steps of admixing iron oxide Fe2O3 and iron fluoride FeF3 both in solid states, and melt-quenching the mixture in an atmosphere of inert gas. The positive electrode active substance mainly composed of FeOF is composed of not less than 50% by weight of FeOF with a remainder being iron fluoride FeF3 and/or iron oxide Fe2O3.
A method of producing a positive electrode active substance comprising mainly FeOF, which comprises the steps of admixing iron oxide Fe2O3 and iron fluoride FeF3 both in solid states, and melt-quenching the mixture in an atmosphere of inert gas, wherein in the melt-quenching, the iron oxide is melted, and the molten mixture is quenched.
A positive electrode active substance consisting of 50% to 99% by weight of FeOF with a remainder being only iron fluoride FeF3.
A positive electrode active substance consisting of 50% to 99% by weight of FeOF with a remainder being iron fluoride FeF3 and/or iron oxide Fe2O3, and wherein the FeOF has a lattice constant c=3.09-3.14 Å with tetragonal rutile structure.
Dependencies are inferred from the claim text.