Li-Ni composite oxide particles for non-aqueous electrolyte secondary cell, process for producing the same, and non-aqueous electrolyte secondary cell
US8066913B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2009 |
| Grant date | Nov 29, 2011 |
| Priority date | — |
| Expiry date | May 8, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to Li—Ni composite oxide particles for a non-aqueous electrolyte secondary cell which have a large charge/discharge capacity, an excellent packing density and excellent storage performance. The Li—Ni composite oxide particles for a non-aqueous electrolyte secondary cell which have a composition represented by the formula:LixNi1-y-zCoyAlz02 in which 0.9<x<1.3; 0.1<y<0.3; and 0<z<0.3, wherein the composite oxide particles have a rate of change in specific surface area of not more than 10% as measured between before and after applying a pressure of 1 t/cm2 thereto, and a sulfate ion content of not more than 1.0%, can be produced by mixing Ni—Co hydroxide particles having a sulfate ion content of not more than 1.0% whose surface is coated with an Al compound having a primary particle diameter of not more than 1 μm, with a lithium compound; and calcining the resulting mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.