	US 12,176,521 B2
	Electroactive materials for metal-ion batteries
Charles A. Mason, Oxford (GB); Richard Gregory Taylor, Penarth (GB); James Farrell, Oxford (GB); and William James Macklin, Wantage (GB)
Assigned to Nexeon Limited, Abingdon (GB)
Appl. No. 17/292,241
Filed by Nexeon Limited, Oxfordshire (GB)
PCT Filed Nov. 8, 2019, PCT No. PCT/GB2019/053176 § 371(c)(1), (2) Date Oct. 7, 2021, PCT Pub. No. WO2020/095067, PCT Pub. Date May 14, 2020.
Application 17/292,241 is a continuation in part of application No. 16/274,182, filed on Feb. 12, 2019, granted, now 11,011,748.
Claims priority of application No. 1818232 (GB), filed on Nov. 8, 2018; application No. 1820736 (GB), filed on Dec. 19, 2018; and application No. 1912993 (GB), filed on Sep. 9, 2019.
Prior Publication US 2022/0149349 A1, May 12, 2022
This patent is subject to a terminal disclaimer.
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 4/62 (2006.01); H01M 10/0525 (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 4/625 (2013.01); H01M 10/0525 (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/or mesopores have a total pore volume as measured by gas adsorption of P¹cm³/g, wherein P¹has a value of at least 0.7, and

the PD₅₀pore diameter as measured by gas adsorption is no more than 5 nm; and

(b) a plurality of nanoscale silicon domains located within the micropores and/or mesopores of the porous carbon framework,

wherein

the weight ratio of silicon to the porous carbon framework in the composite particles is in the range from [0.5×P¹to 1.3×P¹]:1; 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 Mis the mass of the TGA sample at completion of oxidation and M₈₀₀is the mass of the TGA sample at 800° C.