COMPOUND HAVING OLIVINE-TYPE STRUCTURE, POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
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United States of America Patent
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Jun 24, 2014
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Feb 28, 2007
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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.
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