公开(公告)号：US20210210741A1

公开(公告)日：2021-07-08

申请号：US16735737

申请日：2020-01-07

Applicant: Storedot Ltd.

Inventor： Ivgeni SHTERENBERG ,  Eran SELLA ,  Eynat MATZNER ,  Shirel COHEN ,  Hadar MAZOR SHAFIR ,  Daniel ARONOV

IPC: H01M4/04 ,  H01M4/1395 ,  H01M4/38 ,  H01M10/0525 ,  H01M10/02

Abstract: Prelithiation methods and fast charging lithium ion cell are provided, which combine high energy density and high power density. Several structural and chemical modifications are disclosed to enable combination of features that achieve both goals simultaneously in fast charging cells having long cycling lifetime. The cells have anodes with high content of Si, Ge and/or Sn as principal anode material, and cathodes providing a relatively low C/A ratio, with the anodes being prelithiated to have a high lithium content, provided by a prelithiation algorithm. Disclosed algorithms determine lithium content achieved through prelithiation by optimizing the electrolyte to increase cycling lifetime, adjusting energy density with respect to other cell parameters, and possibly reducing the C/A ratio to maintain the required cycling lifetime.