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.

公开(公告)号：US20200020939A1

公开(公告)日：2020-01-16

申请号：US16491488

申请日：2017-03-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: H01M4/485 ,  H01M10/0525 ,  H01M4/131 ,  H01M10/0568 ,  H01M10/0569

Abstract: An electrolyte can be pretreated by contacting with an oxide species (e.g., SiO2, SiOx, where 1≤x≤2, TiO2). The in electrolyte comprises LiPF6 and a carbonate solvent. A reaction occurs to form a pretreated electrolyte comprising a compound selected from the group consisting of: MaPx′OyFz, MaPx′OyFzCnHm, and combinations thereof, where when P in the formula is normalized to 1 so that x′ is equal to about 1, 0