US 12,249,705 B2
Composite material
Christopher Edward Lee, Southampton (GB); David Laughman, Acton, MA (US); Sergey Yakovlev, Gouda (NL); and Lichun Chen, Southampton (GB)
Assigned to ILIKA TECHNOLOGIES LTD, Romsey (GB)
Appl. No. 17/415,353
Filed by ILIKA TECHNOLOGIES LTD, Romsey (GB)
PCT Filed Dec. 20, 2019, PCT No. PCT/GB2019/053651
§ 371(c)(1), (2) Date Jun. 17, 2021,
PCT Pub. No. WO2020/128505, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 1821094 (GB), filed on Dec. 21, 2018.
Prior Publication US 2022/0069291 A1, Mar. 3, 2022
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01)
CPC H01M 4/364 (2013.01) [H01M 4/0414 (2013.01); H01M 2004/021 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An all solid-state electrochemical cell comprising two electrodes and a bulk electrolyte disposed therebetween, wherein at least one electrode comprises a composite material comprising:
a matrix that is provided by matrix particles that comprise an electrode active material; and
a conductive fraction that is both electronically-conductive and ionically-conductive, the conductive fraction being provided by conductive particles that are distributed among the matrix particles, the conductive particles comprising either:
a material that is both ionically- and electronically-conductive; or
a mixture of ionically-conductive particles and electronically-conductive particles, the electronically-conductive particles having a sphericity of at least 0.6;
wherein the conductive particles have a D90 value that is at least 5% of the D50 value of the matrix particles; and
wherein the matrix particles have a particle size distribution such that the D90 value for the matrix particles is at least 1.7 times the D50 value.