LITHIUM ION SECONDARY BATTERY - SEMICONDUCTOR ENERGY LAB

Title:

LITHIUM ION SECONDARY BATTERY

Document Type and Number:

WIPO Patent Application WO/2023/242669

Kind Code:

A1

Abstract:

The present invention provides a lithium ion secondary battery having excellent discharge characteristics even in a low-temperature environment. The lithium ion secondary battery comprises a positive electrode, a negative electrode, and an electrolyte. The positive electrode has a lithium cobalt oxide having a median diameter (D50) of 1-12 µm inclusive. The lithium cobalt oxide has magnesium on the surface layer. The negative electrode has graphite particles, silicon particles, and a polymer having a carboxy group. The electrolyte has a mixed solvent of a fluorinated cyclic carbonate and a fluorinated chain carbonate.

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Inventors:

KIMURA MASAYUKI (JP)
ARAI KENJI (JP)
NAKAO TAISUKE (JP)
OKUZAWA NAOTO (JP)

Application Number:

PCT/IB2023/055746

Publication Date:

December 21, 2023

Filing Date:

June 05, 2023

Export Citation:

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Assignee:

SEMICONDUCTOR ENERGY LAB (JP)

International Classes:

H01M10/052; H01M4/133; H01M4/134; H01M4/36; H01M4/38; H01M4/525; H01M4/587; H01M4/62; H01M10/0569

Foreign References:

JP2014102888A	2014-06-05
JP2022517987A	2022-03-11
JP2019179758A	2019-10-17
JP2021093356A	2021-06-17

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