Negative electrode active material and preparation method therefor, and negative electrode plate including same, electrochemical apparatus, and electronic apparatus
AssigneeNingde Amperex Technology Limited
InventorZheng YI
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Abstract
A negative electrode active material includes a hard carbon material, the hard carbon material includes a carbon element, a hydrogen element, a nitrogen element, and transition metal elements. Based on a total mass of the hard carbon material, a mass percentage of the carbon element is A %, a mass percentage of the hydrogen element is B %, a mass percentage of the nitrogen element is C %, and a mass percentage of the transition metal elements is D %, and 0.003≤B/A≤0.050, 0<C≤12.0, and 0<D≤5.0.
Claims20
A negative electrode active material, comprising a hard carbon material;
- wherein
- the hard carbon material comprises a carbon element, a hydrogen element, a nitrogen element, and transition metal elements;
- based on a total mass of the hard carbon material, a mass percentage of the carbon element is A %, a mass percentage of the hydrogen element is B %, a mass percentage of the nitrogen element is C %, and a mass percentage of the transition metal elements is D %;
- and
- 0.003≤B/A≤0.050, 0<C≤12.0, and 0<D≤5.0.
An electrochemical apparatus, comprising a negative electrode plate;
- the negative electrode plate comprising a negative electrode current collector and a negative electrode film;
- wherein the negative electrode film comprises a negative electrode active material, comprising a hard carbon material;
- wherein
- the hard carbon material comprises a carbon element, a hydrogen element, a nitrogen element, and transition metal elements;
- based on a total mass of the hard carbon material, a mass percentage of the carbon element is A %, a mass percentage of the hydrogen element is B %, a mass percentage of the nitrogen element is C %, and a mass percentage of the transition metal elements is D %;
- and 0.003≤B/A≤0.050, 0<C≤12.0, and 0<D≤5.0.
Dependencies are inferred from the claim text.