	US 12,424,627 B2
	Anode material including carbon coated elliptical secondary graphite particles composed of aggregated ground primary particles, and method for producing the same
Claudio Capiglia, Osaka (JP)
Assigned to TALGA TECHNOLOGIES LIMITED, Cambridge (GB)
Appl. No. 17/642,472
Filed by Talga Technologies Limited, Cambridge (GB)
PCT Filed Sep. 24, 2020, PCT No. PCT/IB2020/058910 § 371(c)(1), (2) Date Mar. 11, 2022, PCT Pub. No. WO2021/059171, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019903561 (AU), filed on Sep. 24, 2019; and application No. 2020902246 (AU), filed on Jul. 1, 2020.
Prior Publication US 2023/0246191 A1, Aug. 3, 2023
Int. Cl. H01M 4/587 (2010.01); C01B 32/21 (2017.01); H01M 4/02 (2006.01); H01M 4/133 (2010.01)

CPC H01M 4/587 (2013.01) [C01B 32/21 (2017.08); H01M 4/133 (2013.01); C01P 2002/72 (2013.01); C01P 2004/03 (2013.01); C01P 2004/32 (2013.01); C01P 2004/50 (2013.01); C01P 2004/61 (2013.01); C01P 2004/84 (2013.01); C01P 2006/11 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)]

22 Claims

1. An anode material comprising secondary graphite particles that have an oblate spheroid form and a D₅₀of less than 5 microns, wherein the secondary graphite particles comprise an aggregate of ground primary graphite particles, and the ground primary graphite particles are spheronised and coated with a carbon based material being one or more of pitch, polyethylene oxide and polyvinyl oxide, then pyrolysed at a temperature between 880° C. to 1100° C. for a time in the range of 12 to 40 hours, thereby producing the secondary graphite particles, and wherein the amount of carbon based material in the secondary graphite particles is in the range of 2 to 10 wt % relative to graphite.