公开(公告)号：US20220102725A1

公开(公告)日：2022-03-31

申请号：US17039366

申请日：2020-09-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Mark W. VERBRUGGE ,  Xingyi YANG ,  Lei WANG ,  Raghunathan K.

IPC: H01M4/58 ,  H01M10/0525 ,  H01M4/136 ,  H01M4/505 ,  H01M4/525 ,  H01M4/1397 ,  H01M4/1393 ,  H01M4/133 ,  H01M4/62

Abstract: An electrochemical cell is provided herein as well as methods for preparing electrochemical cells. The electrochemical cell includes a negative electrode and a positive electrode. The negative electrode includes a prelithiated electroactive material including a lithium silicide. Lithium is present in the prelithiated electroactive material in an amount corresponding to greater than or equal to about 10% of a state of charge of the negative electrode. The electrochemical cell has a negative electrode capacity to positive electrode capacity for lithium (N/P) ratio of greater than or equal to about 1, and the electrochemical cell is capable of operating at an operating voltage of less than or equal to about 5 volts.