Porous silicon-based anode active material, method for preparing the same, and lithium secondary battery comprising the same
US10205164B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 2, 2014 |
| Grant date | Feb 12, 2019 |
| Priority date | — |
| Expiry date | Dec 2, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided are a porous silicon-based anode active material including porous SiOx particles (0≤x<2) having surfaces coated with an oxide layer, a method of preparing the same, and a lithium secondary battery including the porous silicon-based anode active material. Since the anode active material includes an oxide layer formed on the porous SiOx particles (0≤x<2), a reactivity between the anode active material and an electrolyte solution may be reduced and, as a result, an electrical short circuit in an electrode may be minimized. Also, since a plurality of pores is included in surfaces or the surfaces and inside of the SiOx particles, a thickness change rate of the electrode generated during charge and discharge of a secondary battery may be reduced and lifetime characteristics may be improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.