Lithium silicate-based compound and production process for the same, positive-electrode active material and positive electrode for use in lithium-ion secondary battery as well as secondary battery
US9082525B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 12, 2012 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | Oct 12, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lithium silicate-based compound according to the present invention is expressed by a general formula, Li(2−a+b)AaMn(1−x−y)CoxMySiO(4+α)Clβ (In the formula: “A” is at least one element selected from the group consisting of Na, K, Rb and Cs; “M” is at least one member selected from the group consisting of Mg, Ca, Al, Ni, Fe, Nb, Ti, Cr, Cu, Zn, Zr, V, Mo and W; and the respective subscripts appear to be as follows: 0≦“a”<0.2; 0≦“b”<1; 0<“x”<1; 0≦“y”≦0.5; −0.25≦“α”≦1.25; and 0≦“β”≦0.05). The lithium silicate-based compound is used as a positive-electrode active material for secondary battery whose discharge average voltage is higher, and which is able to sorb and desorb lithium ions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.