US 11,784,305 B2
Negative electrode including silicon nanoparticles having a carbon coating thereon
Li Yang, Troy, MI (US); Mei Cai, Bloomfield Hills, MI (US); Meng Jiang, Rochester Hills, MI (US); and Martin S. Ruthkosky, Sterling Heights, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Aug. 13, 2019, as Appl. No. 16/539,647.
Application 16/539,647 is a continuation of application No. 15/337,780, filed on Oct. 28, 2016, granted, now 10,424,784.
Prior Publication US 2019/0372114 A1, Dec. 5, 2019
Int. Cl. H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/62 (2006.01); H01M 10/0569 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/366 (2013.01) [H01M 4/386 (2013.01); H01M 4/621 (2013.01); H01M 4/625 (2013.01); H01M 10/0569 (2013.01); H01M 10/0525 (2013.01); H01M 2300/0034 (2013.01); H01M 2300/0037 (2013.01); H01M 2300/0091 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
providing silicon nanoparticles;
applying a carbon precursor on the silicon nanoparticles, the carbon precursor being an oxygen-free, fluorene-based polymer; and
then heating the silicon nanoparticles in an inert gas atmosphere, thereby forming a carbon coating on the silicon nanoparticles, the carbon coating having an oxygen-free structure including pentagon rings.