Nonaqueous electrolyte secondary battery positive electrode active material and method for producing same, and nonaqueous electrolyte secondary battery which uses positive electrode active material

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United States of America Patent

PATENT NO 11967709
APP PUB NO 20200350565A1
SERIAL NO

16760130

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Abstract

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The present invention provides a composite oxide that can achieve a high low-temperature output characteristic, a method for manufacturing the same, and a positive electrode active material in which the generation of soluble lithium is suppressed and a problem of gelation is not caused during the paste preparation. A positive electrode active material for non-aqueous electrolyte secondary batteries, including a lithium-metal composite oxide powder including a secondary particle configured by aggregating primary particles containing lithium, nickel, manganese, and cobalt, or a lithium-metal composite oxide powder including both the primary particles and the secondary particle, wherein the secondary particle has a hollow structure inside as a main inside structure, the slurry pH is 11.5 or less, the soluble lithium content rate is 0.5 [% by mass] or less, the specific surface area is 2.0 to 3.0 [m2/g], and the porosity is 20 to 50 [%].

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Patent Owner(s)

Patent OwnerAddress
SUMITOMO METAL MINING CO LTD11-3 SHIMBASHI 5-CHOME MINATO-KU TOKYO 105-8716

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aida, Taira Niihama, JP 31 147
Okada, Jiro Niihama, JP 20 226
Oshita, Hiroko Niihama, JP 23 101
Ryoshi, Kazuomi Niihama, JP 64 396
Yamaji, Koji Niihama, JP 25 185

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