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US 12,597,599 B2Granted
Negative electrode material and electrochemical apparatus and electronic apparatus containing same
AssigneeNingde Amperex Technology Limited
InventorQunchao Liao
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Abstract
A negative electrode material includes silicon-based particles. The silicon-based particle includes a silicon-containing matrix and a polymer layer, and the polymer layer is located on a surface of at least a part of the silicon-containing matrix and contains carbon nanotubes and a transition metal element. A lithium-ion battery prepared from the negative active material has improved cycle performance, deformation resistance and rate performance and reduced impedance.
Claims19
A negative electrode material, comprising:
- silicon-based particles, wherein each silicon-based particle comprises a silicon-containing matrix and a polymer layer, and the polymer layer is located on a surface of at least a part of the silicon-containing matrix and contains carbon nanotubes and a transition metal element;
- wherein the polymer layer comprises the following polymer:
- polyacrylonitrile, polyvinyl alcohol, polyvinylpyrrolidone, polyaniline, polyimide, polyamideimide, polysiloxane, polystyrene-butadiene rubber, epoxy resin, polyester resin, polyurethane resin, polyfluorene or any combination thereof;
- wherein, in the each silicon-based particle, a distance from the transition metal element farthest from the surface of the silicon-containing matrix to the surface of the silicon-containing matrix is between about 0.2 μm and about 3 μm.
1 more element
A negative electrode, comprising:
- a negative electrode material, the negative electrode material comprises silicon-based particles, wherein each silicon-based particle comprises a silicon-containing matrix and a polymer layer, and the polymer layer is located on a surface of at least a part of the silicon-containing matrix and contains carbon nanotubes and a transition metal element;
- wherein the polymer layer comprises the following polymer:
- polyacrylonitrile, polyvinyl alcohol, polyvinylpyrrolidone, polyaniline, polyimide, polyamideimide, polysiloxane, polystyrene-butadiene rubber, epoxy resin, polyester resin, polyurethane resin, polyfluorene or any combination thereof;
- wherein, in the each silicon-based particle, a distance from the transition metal element farthest from the surface of the silicon-containing matrix to the surface of the silicon-containing matrix is between about 0.2 μm and about 3 μm.
1 more element
Dependencies are inferred from the claim text.