Negative electrode and secondary battery including negative electrode
US12249718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2020 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Mar 20, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A negative electrode includes a negative electrode active material layer, wherein the negative electrode active material layer includes a negative electrode active material and a conductive material. The negative electrode active material includes SiOx (0≤x<2) particles and the conductive material includes secondary particles in which a portion of one graphene sheet is connected to a portion of an adjacent graphene sheet and a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are coupled to each other, wherein the oxygen content of the secondary particles is 1 wt % to 10 wt % based on the total weight of the secondary particles, the specific surface area of the secondary particles measured by a nitrogen adsorption BET method is 500 m2/g to 1100 m2/g, and the carbon nanotube structure is included in the negative electrode active material layer in an amount of an 0.01 wt % to 1.0 wt %.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.