US 11,936,030 B2
Fabrication process to make electrodes by rolling
Dewen Kong, Shanghai (CN); Xiaochao Que, Shanghai (CN); Meiyuan Wu, Shanghai (CN); Haijing Liu, Shanghai (CN); Xiaosong Huang, Novi, MI (US); and Mark W. Verbrugge, Troy, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM Global Technology Operations LLC, Detroit, MI (US)
Filed on Dec. 1, 2021, as Appl. No. 17/539,811.
Claims priority of application No. 202011387727.1 (CN), filed on Dec. 2, 2020.
Prior Publication US 2022/0173370 A1, Jun. 2, 2022
Int. Cl. H01M 4/04 (2006.01); H01M 4/1397 (2010.01); H01M 4/30 (2006.01); H01M 10/058 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/0435 (2013.01) [H01M 4/0404 (2013.01); H01M 4/1397 (2013.01); H01M 4/30 (2013.01); H01M 10/058 (2013.01); H01M 10/0525 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of manufacturing an electrode for an electrochemical cell, the method comprising:
providing an admixture including an electroactive material, a binder, and a solvent;
rolling the admixture to form a sheet;
forming a multi-layer stack from the sheet;
forming an electrode film precursor by performing a plurality of sequential rollings, each rolling including rolling the multi-layer stack through a first gap defined in a direction transverse to a plane of the multi-layer stack, the plurality of sequential rollings including,
a first rolling in which the multi-layer stack is in a first orientation with respect to a machine direction, and
a second rolling in which the multi-layer stack is in a second orientation with respect to the machine direction, the second orientation being different from the first orientation;
forming an electrode film by rolling the electrode film precursor through a second gap defined in the direction, the second gap being less than or equal to the first gap; and
drying the electrode film to remove at least a portion of the solvent to form the electrode.