Method for preparing solid solution materials such as lithium manganese oxide

US5961950A · kind A · utility

Assignee

• NEC Moli Energy (Canada) Limited · CA

Inventors

• Jeffery Raymond Dahn · Surrey, CA
• Erik Rossen · North Vancouver, CA
• Jan Naess Reimers · Maple Ridge, CA
• Eric Wayne Fuller · Maple Ridge, CA

Key dates

• Filing date: Dec 29, 1997
• Grant date: Oct 5, 1999
• Expiry date: Dec 29, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01D15/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Lithiated manganese oxides are synthesized using a novel two stage process. Using appropriate starting materials, lithiation is accomplished via low temperature ion exchange in aqueous warm salt solution. A drying stage follows which completes the synthesis. Materials suitable for use as cathodes in lithium ion rechargeable batteries have been prepared in this way. Other solid solution transition metal materials might also be prepared using a similar low temperature ion exchange process.