US 12,224,422 B2
Fabrication of lithium battery dry electrodes
Soon Yee Liew, Hong Kong (HK); Yong Zhu, Hong Kong (HK); Yam Chong, Hong Kong (HK); Yu Tat Tse, Hong Kong (HK); Kevin Tan, Hong Kong (HK); Shengbo Lu, Hong Kong (HK); Li Fu, Hong Kong (HK); and Chenmin Liu, Hong Kong (HK)
Assigned to Nano and Advanced Materials Institute Limited, Hong Kong (HK)
Filed by Nano and Advanced Materials Institute Limited, Hong Kong (HK)
Filed on Nov. 19, 2021, as Appl. No. 17/530,496.
Claims priority of provisional application 63/119,675, filed on Dec. 1, 2020.
Prior Publication US 2022/0173369 A1, Jun. 2, 2022
Int. Cl. H01M 4/04 (2006.01); H01M 4/139 (2010.01); H01M 4/58 (2010.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 4/66 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/0435 (2013.01) [H01M 4/139 (2013.01); H01M 4/5825 (2013.01); H01M 4/587 (2013.01); H01M 4/622 (2013.01); H01M 4/625 (2013.01); H01M 4/661 (2013.01); H01M 10/0525 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of preparing a dry electrode layer for a lithium ion battery comprising:
providing a solventless electrode precursor dough to a roller apparatus including electrode active material particles and a binder system including at least one binder, the dough being heated to at a temperature above the melting point of at least one binder of the binder system;
rolling the solventless electrode precursor dough in the roller apparatus, the roller apparatus including a roller and having at least two-axis motion and positioning, including a horizontal axis and a vertical axis;
reducing a thickness of the solventless electrode precursor dough with the roller to create an active material layer;
combining the active material layer with a current collector to create the dry electrode for a lithium ion battery.