公开(公告)号：US20220255132A1

公开(公告)日：2022-08-11

申请号：US17173708

申请日：2021-02-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Meinan He ,  Mei Cai

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587

Abstract: An electrolyte for a lithium ion battery includes a nonaqueous aprotic organic solvent and a lithium salt dissolved in the organic solvent. The organic solvent includes a cyclic carbonate, an acyclic carbonate, and an acyclic fluorinated ether for improved low temperature and high voltage performance as well as enhanced thermostability. The ether group has a general formula of R1—O—[R3—O]n—R2, where n=0 or 1, R1 and R2 are each straight-chain C1-C6 fluoroalkyl groups, and, when n=1, R3 is a methylene group or a polyethylene group.

公开(公告)号：US20220037668A1

公开(公告)日：2022-02-03

申请号：US16943726

申请日：2020-07-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Meinan He ,  Biqiong Wang ,  Mei Cai

IPC: H01M4/66 ,  H01M10/052 ,  H01M4/62 ,  H01M10/0568 ,  H01M4/04 ,  H01M4/139 ,  H01M4/36

Abstract: A positive electrode for an electrochemical cell of a secondary lithium metal battery may include an aluminum metal substrate and a protective layer disposed on a major surface of the aluminum metal substrate. The protective layer may include a conformal aluminum fluoride coating layer. A positive electrode active material layer may overlie the protective layer on the major surface of the aluminum metal substrate. The positive electrode active material layer may include a plurality of interconnected pores, which may be infiltrated with a nonaqueous electrolyte that includes a lithium imide salt.

公开(公告)号：US20190207201A1

公开(公告)日：2019-07-04

申请号：US16131853

申请日：2018-09-14

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Fang Dai ,  Shuru Chen ,  Meinan He ,  Mei Cai

IPC: H01M4/04 ,  H01M10/0585 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/48 ,  H01M4/58 ,  H01M4/1395

Abstract: In a method of manufacturing an electrochemical cell, a porous or non-porous electrically conductive metal substrate may be provided. A conformal metal chalcogenide layer may be formed on a surface of the metal substrate. The metal substrate with the conformal metal chalcogenide layer may be immersed in a nonaqueous liquid electrolyte solution comprising a lithium salt dissolved in a polar aprotic organic solvent. An electrical potential may be established between the metal substrate and a counter electrode immersed in the nonaqueous liquid electrolyte solution such that lithium ions in the electrolyte solution are reduced to metallic lithium and deposited on the surface of the metal substrate over the metal chalcogenide layer to form a conformal lithium metal layer on the surface of the metal substrate over the metal chalcogenide layer.