公开(公告)号：US20220140396A1

公开(公告)日：2022-05-05

申请号：US17084075

申请日：2020-10-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li YANG ,  Umamaheswari VISWANATHAN ,  Mary E. FORTIER

IPC: H01M10/0569 ,  H01M10/0567

Abstract: An electrolyte is provided. The electrolyte includes a solvent containing propylene carbonate (PC); a lithium salt dissolved in the solvent; a first additive dissolved in the solvent, the first additive being configured to stabilize an anode solid electrolyte interphase; a second additive dissolved in the solvent, the second additive being configured to stabilize at least one of an anode, a cathode, or the lithium salt; and a third additive dissolved in the solvent, the third additive being configured to stabilize at least one of an anode, a cathode, or the lithium salt. The first, second, and third additives are chemically distinct. Electrochemical cells including the electrolyte are also provided.

公开(公告)号：US20200220234A1

公开(公告)日：2020-07-09

申请号：US16243517

申请日：2019-01-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Gayatri V. DADHEECH ,  Li YANG ,  Xingcheng XIAO ,  Gongshin QI ,  Vijay P. SAHARAN

IPC: H01M10/52 ,  H01M10/0525 ,  B01J29/068 ,  B01J37/02

Abstract: A lithium ion battery is provided that includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. One or more of the separator, positive electrode, and negative electrode includes a transition metal compound capable of catalyzing any gaseous reactants formed in the lithium ion battery to form a liquid. The transition metal compound may include ruthenium (Ru). In certain variations, the lithium ion battery includes an electrolyte that is a conductive medium for lithium ions to move between the positive electrode and the negative electrode. The electrolyte comprises a transition metal compound capable of catalyzing a reaction of any gaseous reactants to form a liquid.

公开(公告)号：US20200052338A1

公开(公告)日：2020-02-13

申请号：US16659005

申请日：2019-10-21

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Fang LIU ,  Qiangfeng XIAO ,  Yunfeng LU ,  Mei CAI ,  Fang DAI ,  Li YANG

IPC: H01M10/0567 ,  H01M10/42 ,  H01M10/0568 ,  H01M10/0569

Abstract: An example electrolyte includes a solvent, a lithium salt, and an additive selected from the group consisting of a mercaptosilane, a mercaptosiloxane, and combinations thereof. The electrolyte may be used in a method for making a solid electrolyte interface (SEI) layer on a surface of an electrode. A negative electrode structure may be formed from the method.

公开(公告)号：US20190319242A1

公开(公告)日：2019-10-17

申请号：US15953142

申请日：2018-04-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Gayatri V. DADHEECH ,  Li YANG ,  Mei CAI ,  Biqiong WANG

IPC: H01M2/16 ,  H01M10/0525

Abstract: A modified separator for a high-energy lithium metal-based electrochemical cell and methods of formation relating thereto are provided. The modified separator includes a substrate including a dopant and a coating layer disposed on the doped substrate. The dopant and compound comprising the coating layer are independently selected from the group consisting of: aluminum oxide (Al2O3), titanium dioxide (TiO2), zirconium dioxide (ZrO2), zinc oxide (ZnO), iron oxide (Fe2O3), tin oxide (SnO), silicon oxide (SiO2), tantalum oxide (Ta2O5), lanthanum oxide (La2O3), hydrofluoroolefin (HfO), cerium oxide (CeO2), and combinations thereof.

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%.

公开(公告)号：US20200220172A1

公开(公告)日：2020-07-09

申请号：US16243969

申请日：2019-01-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Li YANG ,  Gayatri V. DADHEECH ,  Gongshin QI ,  Mark W. VERBRUGGE ,  Sherman H. ZENG

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0569 ,  H01M10/44

Abstract: A rechargeable lithium-ion battery is provided that includes a positive electrode with a positive electroactive material that in a charged state includes lithium iron (II) orthosilicate (Li2FeSiO4) and in a discharged state includes FeSiO4 or LiFeSiO4. A negative electrode includes phosphorene. A separator is disposed between the positive and negative electrodes. An electrolyte has an organic solvent especially containing ether-based organic solvents and a lithium salt that provides a conductive medium for lithium ions to transfer between the positive electrode and the negative electrode. Such a rechargeable lithium-ion battery provides advantageous power delivery, long driving ranges, and fast charge to enhance widespread use of batteries, especially in vehicles. Furthermore, lithium plating can be minimized or avoided, even at low temperature charging. Methods of recharging a rechargeable lithium-ion battery at low temperatures are also provided.