Negative electrode material and preparation method thereof, secondary battery, and electronic device
AssigneeNingde Amperex Technology Limited
InventorYang LI
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Abstract
A negative electrode material includes silicon-carbon particles, an oxygen amount of the silicon-carbon particles is X %, where 3≤X≤10, the silicon-carbon particle includes an internal region and a surface region, the surface region refers to a region less than 20 nm from a surface of the silicon-carbon particle, the internal region refers to a region in the silicon-carbon particle other than the surface region, and an oxygen amount in the internal region is X1%, where 3≤X1≤10.
Claims20
A negative electrode material, comprising silicon-carbon particles, wherein an oxygen amount in the silicon-carbon particles is X %, wherein 3≤X≤10, each silicon-carbon particle comprises an internal region and a surface region, the surface region is a region within a distance of less than 20 nm from a surface of the each silicon-carbon particle, the internal region is a region in the each silicon-carbon particle other than the surface region, and an oxygen amount in the internal region is X1%, wherein 3≤X1≤10.
A secondary battery, comprising a negative electrode plate, a positive electrode plate, and an electrolyte;
- wherein the negative electrode plate comprises a negative electrode material, wherein the negative electrode material comprises silicon-carbon particles, wherein an oxygen amount in the silicon-carbon particle is X %, wherein 3≤X≤10, each silicon-carbon particle comprises an internal region and a surface region, the surface region is a region within a distance of less than 20 nm from a surface of each silicon-carbon particle, the internal region is a region in each silicon-carbon particle other than the surface region, and an oxygen amount in the internal region is X1%, wherein 3≤X1≤10,
- and the negative electrode material further comprises graphite.
An electronic device, comprising the secondary battery;
- wherein the secondary battery comprises a negative electrode plate, a positive electrode plate, and an electrolyte, wherein the negative electrode plate comprises a negative electrode material, wherein the negative electrode material comprises silicon-carbon particles, wherein an oxygen amount of the silicon-carbon particle is X %, wherein 3≤X≤10, the silicon-carbon particle comprises an internal region and a surface region, the surface region is a region within a distance of less than 20 nm from a surface of the silicon-carbon particle, the internal region is a region in the silicon-carbon particle other than the surface region, and an oxygen amount in the internal region is X1%, wherein 3≤X1≤10,
- and the negative electrode material further comprises graphite.
Dependencies are inferred from the claim text.