Lithium secondary cell and method of producing lithium nickel metal oxide positive electrode therefor
US6709788B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2001 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Nov 12, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lithium secondary cell, in which a water-soluble polymer having a superior resistance to organic solvents is used as a binder, is disclosed. The cell comprises a positive electrode and an electrolytic solution, wherein the positive electrode includes a positive electrode active material having a LiNiO2 compound expressed as LixNi1−yMyO2 (M is at least one element selected from a group including Co, Mn, Al, B, Ti, Mg and Fe, 0<x≦1.2, 0<y≦0.25) with a specific crystallimity and a binder for binding the positive electrode active material. The BET specific surface area of the LiNiO2 compound is not more than 0.65 m2/g. The binder has a water-soluble polymer not swollen with the electrolytic solution. The surface of the positive electrode active material is covered by the water-soluble polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.