Cathode active material and lithium ion rechargeable battery using the material

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United States of America Patent

PATENT NO 8685573
SERIAL NO

13368359

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Abstract

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Provided is a lithium ion rechargeable battery less suffering from swelling even when stored at high temperatures. Disclosed are a cathode active material, a cathode for a lithium ion rechargeable battery using the cathode active material, and a lithium ion rechargeable battery using the cathode. The cathode active material includes particles, each of the particles including a cathode material capable of intercalating and deintercalating lithium ions, and a film formed on at least part of surfaces of the particles. The film includes a compound represented by Chemical Formula (1). Examples of the compound represented by Chemical Formula (1) include lithium squarate and dilithium squarate. Preferably, the lithium ion rechargeable battery is a prismatic battery.

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Patent Owner(s)

  • HITACHI MAXELL, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Honbou, Hidetoshi Hitachinaka, JP 16 124
Iwayasu, Norio Hitachinaka, JP 25 62
Okuda, Yuki Hitachi, JP 9 28

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