Lithium ion secondary battery and method for manufacturing the same

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United States of America Patent

PATENT NO 12074272
APP PUB NO 20220263119A1
SERIAL NO

17736687

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Abstract

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A lithium ion secondary battery includes a positive electrode, a negative electrode, and an electrolyte provided between the positive electrode and the negative electrode. The positive electrode includes a positive electrode current collector and a positive electrode active material layer over the positive electrode current collector. The positive electrode active material layer includes a plurality of lithium-containing composite oxides each of which is expressed by LiMPO4 (M is one or more of Fe (II), Mn (II), Co (II), and Ni (II)) that is a general formula. The lithium-containing composite oxide is a flat single crystal particle in which the length in the b-axis direction is shorter than each of the lengths in the a-axis direction and the c-axis direction. The lithium-containing composite oxide is provided over the positive electrode current collector so that the b-axis of the single crystal particle intersects with the surface of the positive electrode current collector.

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Patent Owner(s)

Patent OwnerAddress
SEMICONDUCTOR ENERGY LABORATORY CO LTD398 HASE ATSUGI-SHI KANAGAWA-KEN 243-0036

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Futamura, Tomoya Kanagawa, JP 47 1169
Inoue, Nobuhiro Kanagawa, JP 125 1546
Kawakami, Takahiro Kanagawa, JP 223 2247
Momo, Junpei Kanagawa, JP 146 2390
Moriwaka, Tamae Kanagawa, JP 44 1467

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