Active material for battery, battery, and method for production of active material for battery
US8980476B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2012 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Jul 19, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An active material for a battery contains a Y2Ti2O5S2 crystalline phase, and has an IB/IA value of 0.3 or smaller and an IC/IA value of 0.15 or smaller, wherein IA, IB and IC are the peak intensity of the Y2Ti2O5S2 crystalline phase at 2θ=34.5°, the peak intensity of a Y2T2O7 crystalline phase at 2θ35.6°, and the peak intensity of TiS2 at 2θ=34.1°, respectively, that are measured by X-ray diffraction using CuKα radiation. The active material is synthesized by preparing a raw material composition containing TiS2, TiO2 and Y2O3 and having a molar ratio of TiS2 to Y2O3 of higher than 1 or containing TiS2, TiO2 and Y2O3 and having a molar ratio of TiO2 to Y2O3 of lower than 1, and heating the raw material composition. A positive or negative-electrode active material layer included in the battery may be contain the active material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.