Negative electrode material for lithium-ion batteries including non-flaky artificial graphite including silicon-containing particles, artificial graphite particles and carbonaceous material
US11031587B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 1, 2016 |
| Grant date | Jun 8, 2021 |
| Priority date | — |
| Expiry date | Feb 1, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A negative electrode material for a lithium ion battery, including silicon-containing particles, artificial graphite particles and a carbonaceous material, wherein at least part of the silicon-containing particles, the artificial graphite particles and the carbonaceous material form composite particles; wherein the silicon-containing particles are silicon particles having a SiOx (0<x≤2) layer on the particle surface, having an oxygen content of 1.0 mass % or more and 18.0 mass % or less, and mainly containing particles having a primary particle diameter of 200 nm or less; wherein the artificial graphite particles are non-flaky artificial graphite particles and have a 50% particle diameter in a volume-based cumulative particle size distribution, D50, of 1.0 μm or more and 15.0 μm or less. Also disclosed is a lithium-ion battery including a negative electrode using the negative electrode material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.