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:
Dec. 04, 2018
Filed:
Mar. 08, 2013
Umicore, Brussels, BE;
Umicore Korea Ltd., Chungnam, KR;
Umicore, Brussels, BE;
Umicore Korea Ltd., Chungnam, KR;
Abstract
The invention discloses an olivine cathode material comprising Li, M and PO 4, having a non-stoichiometric composition wherein: —the phosphor stoichiometry PO 4:[(Li+M)/2] is between 0.940 and 1.020, —the lithium to metal ratio Li:M is between 1.040 and 1.150, and wherein M=Fe−x−z' Mn x D z′, with 0.10<x<0.90, z′>0, D being a dopant comprising either one or both of Cr and Mg. In one embodiment PO 4:[(Li+M)/2] is between 0.960 and 1.000, resulting in an even better performing material. Performance is improved even more in another embodiment wherein PO 4:[(Li+M)/2] is less than 1.000. Improvements in performance are also obtained for either an embodiment wherein the lithium to metal ratio Li:M is between 1.070 and 1.120; or an embodiment wherein the manganese to iron ratio Mn/(Mn+Fe) is between 0.25 and 0.75; or for another embodiment wherein z′<0.05.