公开(公告)号：US20190067729A1

公开(公告)日：2019-02-28

申请号：US15689059

申请日：2017-08-29

Applicant: GM Global Technology Operations LLC

Inventor： Zhiqiang Yu ,  Meiyuan Wu ,  Xiaochao Que ,  Fei Pan ,  Sherman H. Zeng

IPC: H01M10/052 ,  H01M2/02 ,  H01M4/62

Abstract: The present disclosure provides an electrochemical device that may include a stack having at least one electrochemical cell having a first electrode, a second electrode, a porous separator, and an electrolyte liquid disposed in the porous separator and optionally disposed in the first electrode, the second electrode, or both the first electrode and the second electrode. The stack has a first volume of electrolyte liquid. The electrochemical device also has an integrated storage region that stores a second volume of electrolyte liquid and is in fluid communication with the plurality of electrochemical cells and is configured to transfer the electrolyte liquid into the plurality of electrochemical cells, wherein the second volume of electrolyte liquid is at least about 3% of the first volume. Methods of increasing lifetime of the electrochemical device are also provided.