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AssigneeSantoku Corporation
InventorAtsushi IKEGAWA
Estimating the term…
Disclosed is a compound having the olivine structure with which batteries having high capacity, high output, and excellent high rate performance may be produced, as well as a cathode for nonaqueous electrolyte rechargeable batteries produced with this compound, and a nonaqueous electrolyte rechargeable battery provided with this cathode. The present compound is LiFePO4 and the like, which contains at least lithium, a transition metal, phosphorus, and oxygen; has the olivine structure; hardly contains a crystal phase other than the olivine phase; and has a specific surface area of not smaller than 4 m2/g; and is useful as a cathode active material of nonaqueous electrolyte rechargeable batteries.
A compound having an olivine structure comprising at least lithium, a transition metal, phosphorus, and oxygen, said compound having an olivine structure and a specific surface area of not smaller than 4 m2/g, wherein a highest peak intensity (I1) observed in the range of 2θ=23.00° to 23.70°, a highest peak intensity (I2) observed in the range of 2θ=21.40° to 22.90°, and a highest peak intensity (I3) observed in the range of 2θ=17.70° to 19.70° satisfy I1/I2 of not more than 0.050 and I3/I2 of not more than 0.001, as determined by X-ray diffraction under the following conditions:
Dependencies are inferred from the claim text.