Olivine composition with improved cell performance

    公开(公告)号:US10147945B2

    公开(公告)日:2018-12-04

    申请号:US14771237

    申请日:2013-03-08

    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 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′

    Olivine Composition with Improved Cell Performance
    100.
    发明申请
    Olivine Composition with Improved Cell Performance 审中-公开
    橄榄石组合与改善的细胞性能

    公开(公告)号:US20160006035A1

    公开(公告)日:2016-01-07

    申请号:US14771237

    申请日:2013-03-08

    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 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′

    Abstract translation: 本发明公开了一种包含Li,M和PO 4的橄榄石阴极材料,具有非化学计量组成,其中: - 化学计量PO 4:[(Li + M)/ 2]在0.940和1.020之间,锂与金属 比例Li:M在1.040和1.150之间,其中M = Fe-x-z'Mn x D z',其中0.10 0,D是包含Cr和 镁 在一个实施方案中,PO 4:[(Li + M)/ 2]在0.960和1.000之间,导致更好的材料。 在PO 4:[(Li + M)/ 2]小于1.000的另一个实施方案中,性能得到改善。 对于其中锂与金属之比Li:M在1.070和1.120之间的实施例,也可获得性能的改进; 或其中锰与铁的比例Mn /(Mn + Fe)为0.25至0.75的实施方案; 或者z'<0.05的另一个实施方案。

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