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AssigneeNexeon Limited
InventorsSeung Chul Park, Eui Joon Song, Young Tai Cho, Jee Hye Park
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The present invention relates to a cathode active material for a secondary battery and a manufacturing method thereof. A cathode active material, according to one embodiment of the present invention, comprises silicon-based primary particles, and a particle size distribution of the silicon-based primary particles is D10≥50 nm and D90≤150 nm. The cathode active material suppresses or reduces tensile hoop stress generated in lithiated silicon particles during a charging of a battery to thus suppress a crack due to a volume expansion of the silicon particles and/or an irreversible reaction caused by the crack, such that the lifetime and capacity of the battery can be improved.
A cathode active material for a secondary battery, wherein the cathode active material comprises silicon-based primary particles and a particle size distribution of the silicon-based primary particles is D10≥50 nm and D90≤150 nm.
A method for preparing a cathode active material for a secondary battery, the method comprising:
Dependencies are inferred from the claim text.