| 摘要 |
PROBLEM TO BE SOLVED: To provide an active material capable of producing a large discharge capacity with a high rate characteristic. SOLUTION: A method for manufacturing the active material includes: a hydrothermal synthesis step of heating under pressure a mixture that contains a lithium source, a vanadium source, a phosphoric acid source, water, and an ascorbic acid, the ratio of the mole number of lithium atoms to the mole number of vanadium atoms and the ratio of the mole number of phosphorus atoms to the mole number of vanadium atoms are 0.95-1.2, and the ratio of the mole number of the ascorbic acid to the mole number of the vanadium atoms is 0.05-0.6; and a firing step of heating a material obtained at the hydrothermal synthesis step to obtain LiVOPO<SB>4</SB>having aβ-type crystal structure. COPYRIGHT: (C)2011,JPO&INPIT |
