公开(公告)号：US11784305B2

公开(公告)日：2023-10-10

申请号：US16539647

申请日：2019-08-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Mei Cai ,  Meng Jiang ,  Martin S. Ruthkosky

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0569 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/386 ,  H01M4/621 ,  H01M4/625 ,  H01M10/0569 ,  H01M10/0525 ,  H01M2300/0034 ,  H01M2300/0037 ,  H01M2300/0091

Abstract: An example of a negative electrode includes silicon nanoparticles having a carbon coating thereon. The carbon coating has an oxygen-free structure including pentagon rings. The negative electrode with the silicon nanoparticles having the carbon coating thereon may be incorporated into a lithium-based battery. In an example of a method, silicon nanoparticles are provided. A carbon precursor is applied on the silicon nanoparticles. The carbon precursor is an oxygen-free, fluorene-based polymer. Then the silicon nanoparticles are heated in an inert gas atmosphere to form the carbon coating on the silicon nanoparticles. The carbon coating formed on the silicon nanoparticles has an oxygen-free structure including pentagon rings.

公开(公告)号：US20180108952A1

公开(公告)日：2018-04-19

申请号：US15295600

申请日：2016-10-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Mei Cai ,  Martin S. Ruthkosky ,  Fang Dai

IPC: H01M10/48 ,  H01M10/0525

Abstract: An example of a three-electrode test cell includes a negative electrode, a positive electrode having an aperture defined therein, a reference electrode, and a first microporous polymer separator soaked in an electrolyte. The reference electrode is disposed within the aperture of the positive electrode and physically separated from the positive electrode. The first microporous polymer separator is disposed between the negative electrode and the positive electrode.

公开(公告)号：US20180048022A1

公开(公告)日：2018-02-15

申请号：US15237378

申请日：2016-08-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Mei Cai ,  Martin S. Ruthkosky ,  Bing Li

IPC: H01M10/0565 ,  H01M4/48 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/134

CPC classification number: H01M10/0565 ,  H01M4/134 ,  H01M4/386 ,  H01M4/483 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2300/0085

Abstract: An example of a gel electrolyte precursor includes a lithium salt, a solvent, a fluorinated monomer, a fluorinated crosslinker, and an initiator. Another example of a gel electrolyte precursor includes a lithium salt, a solvent, and a fluorinated monomer, wherein the fluorinated monomer is methyl 2-(trifluoromethyl) acrylate, tert-butyl 2-(trifluoromethyl)acrylate, or a combination thereof. A gel electrolyte formed from either gel electrolyte precursor may be incorporated into a lithium-based battery.

公开(公告)号：US20190036111A1

公开(公告)日：2019-01-31

申请号：US15661240

申请日：2017-07-27

Applicant: GM Global Technology Operations LLC

Inventor： Xingcheng Xiao ,  Jingmei Shen ,  Mei Cai ,  Martin S. Ruthkosky

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/38 ,  H01M4/505 ,  H01M4/525

CPC classification number: H01M4/366 ,  C23C24/02 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/1395 ,  H01M4/364 ,  H01M4/386 ,  H01M4/505 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M2220/20

Abstract: Methods for making electroactive composite materials for electrochemical cells are provided. The method includes introducing a particle mixture comprising a first particle having a first diameter (R1) and comprising a first electroactive material and a second particle having a second diameter (R2) smaller than the first diameter (R1) and comprising a second electroactive material into a dry-coating device having a rotatable vessel defining a cavity and a rotor disposed therewithin. The vessel is rotated at a first speed in a first direction, and the rotor is rotated at a second speed greater than the first speed in a second direction opposing the first direction. The particle mixture flows between cavity walls and the rotor and experiences thrusting and compression forces that create a substantially uniform coating comprising the second electroactive material on one or more exposed surfaces of the first particle.

公开(公告)号：US10476074B2

公开(公告)日：2019-11-12

申请号：US15661240

申请日：2017-07-27

Applicant: GM Global Technology Operations LLC

Inventor： Xingcheng Xiao ,  Jingmei Shen ,  Mei Cai ,  Martin S. Ruthkosky

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/58 ,  C23C24/02 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/505 ,  H01M4/525 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/1395

Abstract: Methods for making electroactive composite materials for electrochemical cells are provided. The method includes introducing a particle mixture comprising a first particle having a first diameter (R1) and comprising a first electroactive material and a second particle having a second diameter (R2) smaller than the first diameter (R1) and comprising a second electroactive material into a dry-coating device having a rotatable vessel defining a cavity and a rotor disposed therewithin. The vessel is rotated at a first speed in a first direction, and the rotor is rotated at a second speed greater than the first speed in a second direction opposing the first direction. The particle mixture flows between cavity walls and the rotor and experiences thrusting and compression forces that create a substantially uniform coating comprising the second electroactive material on one or more exposed surfaces of the first particle.

公开(公告)号：US10326166B2

公开(公告)日：2019-06-18

申请号：US15237378

申请日：2016-08-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Mei Cai ,  Martin S. Ruthkosky ,  Bing Li

IPC: H01M10/0565 ,  H01M4/134 ,  H01M4/38 ,  H01M4/48 ,  H01M10/0525 ,  H01M4/02

Abstract: An example of a gel electrolyte precursor includes a lithium salt, a solvent, a fluorinated monomer, a fluorinated crosslinker, and an initiator. Another example of a gel electrolyte precursor includes a lithium salt, a solvent, and a fluorinated monomer, wherein the fluorinated monomer is methyl 2-(trifluoromethyl) acrylate, tert-butyl 2-(trifluoromethyl)acrylate, or a combination thereof. A gel electrolyte formed from either gel electrolyte precursor may be incorporated into a lithium-based battery.

公开(公告)号：US10446884B2

公开(公告)日：2019-10-15

申请号：US15295600

申请日：2016-10-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Mei Cai ,  Martin S. Ruthkosky ,  Fang Dai

IPC: H01M10/48 ,  H01M10/0525

Abstract: An example of a three-electrode test cell includes a negative electrode, a positive electrode having an aperture defined therein, a reference electrode, and a first microporous polymer separator soaked in an electrolyte. The reference electrode is disposed within the aperture of the positive electrode and physically separated from the positive electrode. The first microporous polymer separator is disposed between the negative electrode and the positive electrode.

公开(公告)号：US10424784B2

公开(公告)日：2019-09-24

申请号：US15337780

申请日：2016-10-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Mei Cai ,  Meng Jiang ,  Martin S. Ruthkosky

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0569 ,  H01M10/0525

Abstract: An example of a negative electrode includes silicon nanoparticles having a carbon coating thereon. The carbon coating has an oxygen-free structure including pentagon rings. The negative electrode with the silicon nanoparticles having the carbon coating thereon may be incorporated into a lithium-based battery. In an example of a method, silicon nanoparticles are provided. A carbon precursor is applied on the silicon nanoparticles. The carbon precursor is an oxygen-free, fluorene-based polymer. Then the silicon nanoparticles are heated in an inert gas atmosphere to form the carbon coating on the silicon nanoparticles. The carbon coating formed on the silicon nanoparticles has an oxygen-free structure including pentagon rings.

公开(公告)号：US20180123124A1

公开(公告)日：2018-05-03

申请号：US15337780

申请日：2016-10-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Li Yang ,  Mei Cai ,  Meng Jiang ,  Martin S. Ruthkosky

IPC: H01M4/36 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/38 ,  H01M4/62

Abstract: An example of a negative electrode includes silicon nanoparticles having a carbon coating thereon. The carbon coating has an oxygen-free structure including pentagon rings. The negative electrode with the silicon nanoparticles having the carbon coating thereon may be incorporated into a lithium-based battery. In an example of a method, silicon nanoparticles are provided. A carbon precursor is applied on the silicon nanoparticles. The carbon precursor is an oxygen-free, fluorene-based polymer. Then the silicon nanoparticles are heated in an inert gas atmosphere to form the carbon coating on the silicon nanoparticles. The carbon coating formed on the silicon nanoparticles has an oxygen-free structure including pentagon rings.