Methods to stabilize lithium titanate oxide (LTO) by electrolyte pretreatment
US11302916B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2017 |
| Grant date | Apr 12, 2022 |
| Priority date | — |
| Expiry date | Jun 17, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrolyte can be pretreated by contacting with an oxide species (e.g., SiO2, SiOx, where 1≤x≤2, TiO2). The electrolyte comprises LiPF6 and a carbonate solvent. A reaction occurs to form a pretreated electrolyte comprising a compound selected from the group consisting of: MaPx′OyFz, MaPx′OyFzCnHm, and combinations thereof, where when P in the formula is normalized to 1 so that x′ is equal to about 1, 0<y≤4, 0<z≤6, 0≤a≤3, 0 ≤n≤20, 0≤m≤42, and M is selected from Li, Na, K, Mg, Ca, B, Ti, Al, and combinations thereof. Lithium-ion electrochemical cells including lithium titanate oxide (LTO) using such a pretreated electrolyte have reduced reactivity and gas formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.