Negative active material and preparation method thereof, secondary battery, battery module, battery pack and power utilization device
Source: EPO OPS
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Dossier Overview
Application number
CN20228089517
Inventor
ZHOU YI; WU QIFAN; ZHANG MING
Filing Date
Sep 9, 2022
Publication Date
Sep 27, 2024
Patent Family ID
90192465
IPC Classification
CPC Classification
The invention discloses a negative electrode active material and a preparation method thereof, a secondary battery and an electric device. Wherein the negative electrode active material (6) comprises: a core material (61) comprising a silicon-based material; a first coating layer (62) on at least part of the surface of the core material (61), the first coating layer (62) comprising SiOx, 1 < x < 2; and a second coating layer (63) on at least part of the surface of the first coating layer (62), the second coating layer (63) comprising a fluorinated carbon material.
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