Ultrathin surface coating on negative electrodes to prevent transition metal deposition and methods for making and use thereof
US9034519B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2013 |
| Grant date | May 19, 2015 |
| Priority date | — |
| Expiry date | Jan 18, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrode material for use in an electrochemical cell, like a lithium-ion battery, is provided. The electrode material may be a negative electrode comprising graphite, silicon, silicon-alloys, or tin-alloys, for example. By avoiding deposition of transition metals, the battery substantially avoids charge capacity fade during operation. The surface coating is particularly useful with negative electrodes to minimize or prevent deposition of transition metals thereon in the electrochemical cell. The coating has a thickness of less than or equal to about 40 nm. Methods for making such materials and using such coatings to minimize transition metal deposition in electrochemical cells are likewise provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.