Lithium metal phosphates, method for producing the same and use thereof as electrode material

US7998618B2 · kind B2 · utility

Assignee

• SUD-Chemi AG · DE

Inventors

• Gerhard Nuspl · Munich, DE
• Lucia Wimmer · Landshut, DE
• Max Eisgruber · Bruckberg, DE

Key dates

• Filing date: Oct 4, 2010
• Grant date: Aug 16, 2011
• Expiry date: Oct 4, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The invention describes a process for producing a compound of the formula LiMPO.sub.4, in which M represents at least one metal from the first transition series, comprising the following steps: a) production of a precursor mixture, containing at least one Li.sup.+ source, at least one M.sup.2+ source and at least one PO.sub.4.sup.3− source, in order to form a precipitate and thereby to produce a precursor suspension; b) dispersing or milling treatment of the precursor mixture and/or the precursor suspension until the D90 value of the particles in the precursor suspension is less than 50 .mu.m; and c) the obtaining of LiMPO.sub.4 from the precursor suspension obtained in accordance with b), preferably by reaction under hydrothermal conditions. The material obtainable by this process has particularly advantageous particle size distributions and electrochemical properties when used in electrodes.