公开(公告)号：US20190058211A1

公开(公告)日：2019-02-21

申请号：US15677249

申请日：2017-08-15

Applicant: GM Global Technology Operations LLC

Inventor： Li Yang ,  Mei Cai

IPC: H01M10/0525 ,  H01M10/0569

Abstract: A highly-concentrated electrolyte system for an electrochemical cell is provided, along with methods of making the highly-concentrated electrolyte system. The electrolyte system includes a bound moiety having an ionization potential greater than an electron affinity and comprising one or more salts selected from the group consisting of: lithium bis(fluorosulfonyl)imide (LiFSI), sodium bis(fluorosulfonyl)imide (NaFSI), potassium bis(fluorosulfonyl)imide (KFSI), and combinations thereof bound to a solvent comprising dimethoxyethane (DME). The one or more salts have a concentration in the electrolyte system of greater than about 4M, and a molar ratio of the one or more salts to the dimethoxyethane (DME) is greater than or equal to about 1 to less than or equal to about 1.5. The one or more salts binds to the dimethoxyethane (DME) causing the electrolyte system to be substantially free of unbound dimethoxyethane (DME) and unbound bis(fluorosulfonyl)imide (FSI−).

公开(公告)号：US20190058210A1

公开(公告)日：2019-02-21

申请号：US15677760

申请日：2017-08-15

Applicant: GM Global Technology Operations LLC

Inventor： Fang Dai ,  Li Yang ,  Thomas A. Yersak ,  James R. Salvador ,  Mei Cai

IPC: H01M10/056 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/38

Abstract: An electrochemical cell includes a negative electrode that contains lithium and an electrolyte system. In one variation, the electrolyte system includes a first liquid electrolyte, a solid-dendrite-blocking layer, and an interface layer. The solid dendrite-blocking layer is ionically conducting and electrically insulating. The dendrite-blocking layer includes a first component and a distinct second component. The dendrite-blocking layer has a shear modulus of greater than or equal to about 7.5 GPa at 23° C. The interface layer is configured to interface with a negative electrode including lithium metal on a first side and the dendrite blocking layer on a second opposite side. The interface layer includes a second liquid electrolyte, a gel polymer electrolyte, or a solid-state electrolyte. The dendrite-blocking layer is disposed between the first liquid electrolyte and the interface layer.

公开(公告)号：US20140272569A1

公开(公告)日：2014-09-18

申请号：US13836157

申请日：2013-03-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC.

Inventor： Mei Cai ,  Mark W. Verbrugge ,  Xiaosong Huang ,  Li Yang

IPC: H01M2/16 ,  H01M4/04 ,  H01M2/14 ,  H01M4/36

CPC classification number: H01M2/1686 ,  H01M2/145 ,  H01M2/162 ,  H01M2/1653 ,  H01M2/1673 ,  H01M4/0402 ,  H01M4/134 ,  H01M4/366 ,  Y10T29/49115

Abstract: A battery with a sulfur-containing cathode, an anode, and a separator between the cathode and the anode has a coating comprising a single-lithium ion conductor on at least one of the cathode or the separator.

Abstract translation: 在阴极和阳极之间具有含硫阴极，阳极和隔板的电池具有在阴极或隔板中的至少一个上包含单锂离子导体的涂层。