公开(公告)号：US11114666B2

公开(公告)日：2021-09-07

申请号：US16548855

申请日：2019-08-23

Applicant: Ningde Amperex Technology Limited

Inventor： Hang Cui ,  Taiqiang Chen ,  Yuansen Xie

IPC: H01M4/587 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/02

Abstract: The present invention provides a modified graphite negative electrode material, preparation method thereof and a secondary battery. The modified graphite negative electrode material includes a graphite and a multilayer graphene. The multilayer graphene are dispersed in the graphite. The multilayer graphene are loaded with a conductive agent by bonding of a binder. The modified graphite negative electrode material can achieve a higher compaction density for the negative electrode, and can effectively improve the lithium precipitation of the negative electrode of the secondary battery while improving the cycle performance of the secondary battery when being applied to the secondary battery.

公开(公告)号：US20200014028A1

公开(公告)日：2020-01-09

申请号：US16548855

申请日：2019-08-23

Applicant: Ningde Amperex Technology Limited

Inventor： Hang Cui ,  Taiqiang Chen ,  Yuansen Xie

IPC: H01M4/587 ,  H01M4/36 ,  H01M4/62

Abstract: The present invention provides a modified graphite negative electrode material, preparation method thereof and a secondary battery. The modified graphite negative electrode material includes a graphite and a multilayer graphene. The multilayer graphene are dispersed in the graphite. The multilayer graphene are loaded with a conductive agent by bonding of a binder. The modified graphite negative electrode material can achieve a higher compaction density for the negative electrode, and can effectively improve the lithium precipitation of the negative electrode of the secondary battery while improving the cycle performance of the secondary battery when being applied to the secondary battery.