公开(公告)号：US20200035998A1

公开(公告)日：2020-01-30

申请号：US16491460

申请日：2017-03-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Peng LU ,  Michael P. BALOGH ,  Zhiqiang YU ,  Haijing LIU ,  Daad B. HADDAD

IPC: H01M4/13915 ,  H01M4/1315 ,  H01M4/36 ,  H01M10/0525 ,  H01M10/0568 ,  H01M4/485

Abstract: Methods of pretreating an electroactive material comprising lithium titanate oxide (LTO) include contacting a surface of the electroactive material with a pretreatment composition. In one variation, the pretreatment composition includes a salt of lithium fluoride salt selected from the group consisting of: lithium hexafluorophosphate (LiPF6), lithium tetrafluoroborate (LiBF4), and combinations thereof, and a solvent. In another variation, the pretreatment composition includes an organophosphorus compound. In this manner, a protective surface coating forms on the surface of the electroactive material. The protective surface coating comprises fluorine, oxygen, phosphorus or boron, as well as optional elements such as carbon, hydrogen, and listed metals, and combinations thereof.