Titanium oxide compound for use in electrode and lithium secondary battery comprising the same
US8361657B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2009 |
| Grant date | Jan 29, 2013 |
| Priority date | — |
| Expiry date | Nov 15, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
For the purpose of increasing the electric capacity of lithium secondary batteries comprising titanium-based negative electrode materials, the present invention aims to produce a titanium oxide compound whose crystal structure, crystallite size, specific surface area and primary particle size are controlled, and to provide a lithium secondary battery comprising such a compound.The present invention produces a lithium secondary battery by using, as an electrode active material, a titanium oxide compound for use in an electrode, which is represented by TiO2.(H2O)a.(A2O)b (wherein A is Na or K, a is 0<a=1, and b is 0<b=0.1) and has a main peak at 2θ=20° to 30° and a minor peak at 2θ=45° to 55° in its X-ray diffraction pattern, wherein the crystallite size determined from the main peak ranges from 40 Å more to 500 Å or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.