Negative electrode active material and preparation method therefor, and related device
AssigneeContemporary Amperex Technology Co., Limited
InventorQing Ai
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Abstract
A negative electrode active material and a preparation method therefore, and a related device are disclosed. The negative electrode active material comprises a negative electrode active substance and a coating layer. The coating layer is coated on the surface of the negative electrode active substance, and the coating layer comprises at least one of polymethyl methacrylate, sodium maleate, and oleic acid diethanolamide borate. The cycle performance and the initial coulombic efficiency of batteries are improved.
Claims18
A negative electrode active material, comprising:
- a negative electrode active substance and a coating layer, wherein the coating layer is coated on a surface of the negative electrode active substance, and the coating layer comprises at least one of polymethyl methacrylate, sodium maleate, and oleic diethanolamide borate.
A preparation method for a negative electrode active material, comprising:
- providing a negative electrode active substance and a coating substance;
- and
- mixing the negative electrode active substance and the coating substance, and performing a treatment to obtain the negative electrode active substance and a coating layer coated on a surface of the negative electrode active substance,
- wherein the coating substance comprises at least one of methyl methacrylate, sodium maleate, and oleic diethanolamide borate.
Dependencies are inferred from the claim text.