公开(公告)号：US20140234719A1

公开(公告)日：2014-08-21

申请号：US14343422

申请日：2012-09-13

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Leif Christensen

IPC: H01M4/505 ,  H01M4/04 ,  H01M4/525

CPC classification number: H01M4/04 ,  H01M4/366 ,  H01M4/382 ,  H01M4/386 ,  H01M4/387 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028 ,  Y10T29/49108

Abstract: High capacity lithium-ion electrochemical cells and methods of making the same are provided that include a positive electrode that includes a lithium mixed metal oxide having a first irreversible capacity and a negative electrode that includes an alloy anode material having a first irreversible capacity when the anode is delithiated to 0.9 V vs. Li/Li+. The lithium mixed metal oxide includes at least one of nickel, cobalt, and manganese. The alloy anode compound includes at least one of silicon and tin. The first cycle irreversible capacity of the positive electrode is greater than or equal to the first cycle irreversible capacity loss of the negative electrode.

Abstract translation: 提供了高容量锂离子电化学电池及其制造方法，其包括正极，其包括具有第一不可逆容量的锂复合金属氧化物和负极，其包含当阳极具有第一不可逆容量的合金阳极材料 相对于Li / Li +释放到0.9V。 锂复合金属氧化物包括镍，钴和锰中的至少一种。 合金阳极化合物包括硅和锡中的至少一种。 正极的第一循环不可逆容量大于或等于负极的第一循环不可逆容量损失。

公开(公告)号：US20140302393A1

公开(公告)日：2014-10-09

申请号：US14353791

申请日：2012-10-25

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Leif Christensen ,  Kevin W. Eberman

IPC: H01M4/36 ,  H01M10/058 ,  H01M10/0525 ,  H01M4/485 ,  H01M4/525

CPC classification number: H01M4/366 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/362 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/058 ,  Y10T29/49108

Abstract: High capacity lithium-ion electrochemical cells are provided that include positive electrode comprising a layered lithium transition metal oxide having a first irreversible capacity and a negative electrode that includes an alloy anode material that also has a first irreversible capacity. The first irreversible capacity of the positive electrode is less than the first irreversible capacity of the negative electrode. The discharge voltage curve of the positive electrode covers at least 10% of its capacity at voltages below 3.5 V ea) vs. Li/Li+. The average discharge voltage of the positive electrode is above 3.75 V vs. Li/Li+ when the cell is discharged from about 4.6 V vs. Li/Li+ to about 2.5 V vs. Li/Li+ at a rate of C/10 or slower and when the electrochemical cell is discharged to a final discharge voltage of about 2.5 V vs. Li/Li+ or greater.

Abstract translation: 提供了高容量锂离子电化学电池，其包括具有第一不可逆容量的层状锂过渡金属氧化物的正电极和包含也具有第一不可逆容量的合金阳极材料的负电极。 正极的第一不可逆容量小于负极的第一不可逆容量。 正极的放电电压曲线在低于3.5V ea）相对于Li / Li +的电压下至少占其容量的10％。 当电池从约4.6V对Li / Li +放电至约2.5V时，正极的平均放电电压相对于Li / Li +高于3.75V，相对于Li / Li +以C / 10或更慢的速率放电， 当电化学电池放电到约2.5V对Li / Li +或更高的最终放电电压时。