	US 12,218,341 B2
	Electroactive materials for metal-ion batteries
Charles A. Mason, Oxford (GB); Richard Gregory Taylor, Penarth (GB); James Farrell, Oxford (GB); William James Macklin, Wantage (GB); and Christopher Michael Friend, Oxfordshire (GB)
Assigned to Nexeon Limited, Abingdon (GB)
Appl. No. 17/292,262
Filed by Nexeon Limited, Oxfordshire (GB)
PCT Filed Nov. 8, 2019, PCT No. PCT/GB2019/053175 § 371(c)(1), (2) Date Oct. 7, 2021, PCT Pub. No. WO2020/095066, PCT Pub. Date May 14, 2020.
Application 17/292,262 is a continuation of application No. 16/274,185, filed on Feb. 12, 2019, granted, now 11,165,054.
Claims priority of application No. 1818235 (GB), filed on Nov. 8, 2018; application No. 1820742 (GB), filed on Dec. 19, 2018; and application No. 1912992 (GB), filed on Sep. 9, 2019.
Prior Publication US 2022/0123282 A1, Apr. 21, 2022
Int. Cl. H01M 4/36 (2006.01); H01B 1/18 (2006.01); H01M 4/133 (2010.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 4/587 (2010.01); H01M 4/02 (2006.01)

CPC H01M 4/364 (2013.01) [H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/386 (2013.01); H01M 4/587 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)]

27 Claims

1. A particulate material comprising a plurality of composite particles, wherein the composite particles comprise:

(a) a porous carbon framework comprising micropores and/or mesopores, wherein

the micropores and mesopores have a total pore volume as measured by gas adsorption of P¹cm³/g, wherein P¹has a value of at least 0.6, and

the PD₅₀pore diameter as measured by gas adsorption is no more than 2 nm; and

(b) an electroactive material located within the micropores and/or mesopores of the porous carbon framework, wherein the electroactive material is silicon,

wherein

the composite particles have a D₉₀particle diameter of no more than 10 μm; and

the particulate material has a Z value of no more than 10% as determined by TGA analysis in air, in which Z=1.875×[(M_f−M₈₀₀)/M_f]×100%, in which M_fis the mass of the TGA sample at completion of oxidation and M₈₀₀is the mass of the TGA sample at 800° C., and wherein the Z value is the percentage of unoxidized silicon at 800° C.