ANODE, LITHIUM ION SECONDARY BATTERY, AND MANUFACTURING METHOD OF LITHIUM ION SECONDARY BATTERY

Japanese Patent JP2023018964

A

To provide an anode capable of realizing sufficient battery cycle characteristics while including a silicon-based anode material, a lithium ion secondary battery comprising the anode, and a manufacturing method of the lithium ion secondary battery.SOLUTION: The present invention relates to an anode which includes anode active material particles and is charged at least once. In the anode, the anode active material particle contains a silicon oxide particle coated by a carbon layer, and the silicon oxide particle contains Li2SiO3 at least partially. An outermost surface of the anode active material particle is covered by a composite coating containing Si, O, C and H. A TOF-SIMS spectrum obtained by time-of-flight secondary ion mass spectrometry regarding a surface of the anode active material particle has as a peak of negative secondary ions at least one of a peak assigned to SiHO3-, a peak assigned to SiO2CH3-, and a peak assigned to SiOCH3-.SELECTED DRAWING: Figure 5

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HIROSE KIICHI
KIYOMORI AYUMI
AOKI SHOTARO
KINRI SHUHEI
SAKAI REIKO

JP2021123372A

February 09, 2023

July 28, 2021

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SHINETSU CHEMICAL CO

H01M4/13; H01M4/139; H01M4/36; H01M4/48; H01M10/052; H01M10/0566; H01M10/0567; H01M10/058

Mikio Yoshimiya
Toshihiro Kobayashi
Toru Otsuka

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