The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 2012
Filed:
Apr. 10, 2002
Reinhard P. Hemmer, Illertissen, DE;
Giesela Arnold, Ulm, DE;
Christian Vogler, Westerstetten-Vorderdenkental, DE;
Margret Wohlfahrt-mehrens, Illertissen, DE;
Reinhard P. Hemmer, Illertissen, DE;
Giesela Arnold, Ulm, DE;
Christian Vogler, Westerstetten-Vorderdenkental, DE;
Margret Wohlfahrt-Mehrens, Illertissen, DE;
Abstract
The invention relates to binary, ternary and quaternary lithium phosphates of general formula Li(FeMM)POwherein Mrepresents at least one element of the group comprising Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Be, Mg, Ca, Sr, Ba, Al, Zr, and La; Mrepresents at least one element of the group comprising Sc, Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Be, Mg, Ca, Sr, Ba, Al, Zr, and La; x=between 0.5 and 1, y=between 0 and 0.5, z=between 0 and 0.5, provided that x+y+z=1, or x=0, y=1 and z=0. The said lithium phosphates can be obtained according to a method whereby precursor compounds of elements Li, Fe, Mand/or Mare precipitated from aqueous solutions and the precipitation product is dried in an inert gas atmosphere or a reducing atmosphere at a temperature which is between room temperature and approximately 200° C. and tempered at a temperature of between 300° C. and 1000° C. The inventive lithium phosphates have a very high capacity when used as cathode material in lithium accumulators.