Negative electrode active material for lithium secondary battery and negative electrode for lithium secondary battery
US8748040B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2011 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Mar 15, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A negative electrode active material for a lithium secondary battery, which includes a composition including Si in an amount of from 30% to 65% by mass of the negative electrode active material, includes a two phase matrix structure including an Sn—Cu based alloy matrix including an Sn content of 50% by mass or more of the Sn—Cu based alloy matrix, Si crystallites dispersed in the Sn—Cu based alloy matrix, and an Si—X based alloy crystallized so as to at least partially cover the Si crystallites, in which X is at least one element selected from Fe, Ni, and Co, and is added in an amount of 1% by mass or more of the negative electrode active material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.