公开(公告)号：US20220109151A1

公开(公告)日：2022-04-07

申请号：US17062358

申请日：2020-10-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mary E. FORTIER ,  Bing TAN ,  Li YANG ,  Umamaheswari VISWANATHAN ,  Vijay P. SAHARAN ,  Sherman H. ZENG

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/38 ,  H01M10/0525

Abstract: The present disclosure relates to over-lithiated positive electroactive materials for use within an electrochemical cell. For example, the electrochemical cell includes a positive electrode that includes an over-lithiated positive electroactive material that includes one of LixMn2O4 (where 1.05≤x≤1.30) and LiMn(2−x)NixO4 (where 0≤x≤0.5). The electrochemical cell can include a negative electrode that includes a silicon-containing negative electroactive material having a Columbic Efficiency greater than or equal to about 80% and less than or equal to about 90%.