公开(公告)号：US20180287149A1

公开(公告)日：2018-10-04

申请号：US15525034

申请日：2015-11-18

申请人： ILJIN ELECTRIC CO., LTD.

发明人： Young Pil Choi ,  Cheol Ho Park ,  Min Hyun Kim ,  Myeong Han Kim ,  Seon Kyong Kim

IPC分类号： H01M4/38 ,  H01M10/052

摘要： Disclosed is a negative active material, which has a small change in a volume during charge/discharge, has enhanced initial efficiency and capacity maintenance characteristics. A fine crystalline region exists on a matrix of an alloy, and lithium is more easily dispersed due to the fine crystalline region. The negative active material for a secondary battery has an improved expansion rate, and is formed by a formula below, and its expansion rate after 50 cycles is 70 to 150%, and an amorphization degree on a matrix within an alloy has a range of 25% or more, and Si has a range of 60 to 70%, Ti has a range of 9 to 14%, Fe has a range of 9 to 14%, and Al has a range larger than 1% and less than 20%. Formula: SixTiyFezAlu (x, y, z, and u are at %, x is 1−(y+z+u))

公开(公告)号：US20180190977A1

公开(公告)日：2018-07-05

申请号：US15738666

申请日：2016-05-31

申请人： ILJIN ELECTRIC CO., LTD.

发明人： Cheol Ho Park ,  Min Hyun Kim ,  Young Pil Choi ,  Seon Kyong Kim

IPC分类号： H01M4/36 ,  H01M4/38 ,  H01M10/052

CPC分类号： H01M4/366 ,  H01M4/134 ,  H01M4/362 ,  H01M4/386 ,  H01M4/62 ,  H01M10/052 ,  H01M2004/027

摘要： Provided are a negative electrode active material for a secondary battery, in which a silicon-based negative electrode active material is formed in a three-layer structure including an amorphous matrix, thereby suppressing a dispersal phenomenon of the negative electrode active material during charging/discharging. The negative electrode active material having a three-layer structure includes: a silicon (Si) layer; an amorphous matrix layer outside the Si layer; and a nano grain matrix layer formed on an interface between the Si layer and the amorphous matrix layer.

公开(公告)号：US20180175380A1

公开(公告)日：2018-06-21

申请号：US15738649

申请日：2016-05-31

申请人： Iljin Electric Co., Ltd.

发明人： Cheol Ho Park ,  Min Hyun Kim ,  Young Pil Choi ,  Seon Kyong Kim

IPC分类号： H01M4/36 ,  H01M4/38 ,  H01M10/0525 ,  C01B33/037

CPC分类号： H01M4/366 ,  C01B33/037 ,  C01P2002/70 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/362 ,  H01M4/386 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/027

摘要： Provided are a negative electrode active material for a secondary battery, which suppresses a dispersal phenomenon of a negative electrode active material during charging/discharging by controlling a lattice mismatch ratio of an amorphous matrix layer to a silicon layer in a silicon-based negative electrode active material.