Lithium-ion-conducting materials
US9039918B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2013 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Aug 4, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Lithium-ion-conducting ceramic materials are disclosed having characteristics of high lithium-ion conductivity at low temperatures, good current efficiency, and stability in water and corrosive media under static and electrochemical conditions. Some general formulas for the lithium-ion-conducting materials include MI1+x+z−δMIIIxMIVayMIVb2−x−yMVzP3−zO12 and MI1+x+4z−δMIIIxMIVayMIVb2−x−y−zP3O12, wherein MI comprises Li, Na, or mixtures thereof; 0.05<x<0.5, 0.05<y<2, 0≦z<3, and 0≦δ<0.5; MIII comprises Al, Hf, Sc, Y, La, or mixtures thereof; MIVa comprises Zr, Ge, Sn, or mixtures thereof; MIVb comprises Ti; and MV comprises Si, Ge, Sn, or mixtures thereof. In some cases, the lithium-ion conducting materials are formed through a process in which the materials' powdered precursors are milled after being calcined and before being sintered. The milling process may include using milling media of multiple sizes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.