Loading patent…
AssigneeContemporary Amperex Technology (Hong Kong) Limited
InventorsKai WU, Jiazheng WANG, Zijian LV, Xiaobin DONG
Estimating the term…
The present application provides a negative electrode active material, a method for preparing the same, a secondary battery and an electrical device comprising the same, wherein the negative electrode active material comprises a carbon matrix and a filling material, wherein the carbon matrix has a graphitization degree of less than or equal to 87%, the carbon matrix comprises a plurality of pore structures, at least a portion of the filling material is located in the pore structures of the carbon matrix, and the filling material comprises one or more of elements capable of alloying reaction with Li. The negative electrode active material provided by the present application can have high energy density, high initial coulombic efficiency, low volume expansion, high conductivity and good cycle stability at the same time.
A negative electrode active material, comprising a carbon matrix and a filling material, wherein the carbon matrix has a graphitization degree of less than or equal to 87%, optionally from 65% to 87%, and the carbon matrix comprises a plurality of pore structures, and at least a portion of the filling material is located in the pore structures of the carbon matrix, and the filling material comprises one or more of elements capable of alloying reaction with Li, and optionally the one or more of elements capable of alloying reaction with Li comprises one or more of silicon element, tin element, and germanium element.
A method for preparing a negative electrode active material, comprising the following steps:
Dependencies are inferred from the claim text.