US 12,322,801 B2
Olivine-type compounds: method for their preparation and use in cathode materials for sodium-ion batteries
Montse Galceran Mestres, Álava (ES); Montse Casas-Cabanas, Álava (ES); Abdelbast Guerfi, Varennes (CA); Michel Armand, Álava (ES); Teofilo Rojo, Álava (ES); Karim Zaghib, Varennes (CA); and Andrea Paolella, Montreal (CA)
Assigned to HYDRO-QUÉBEC, Montreal (CA)
Filed by HYDRO-QUÉBEC, Montreal (CA)
Filed on Dec. 22, 2022, as Appl. No. 18/145,348.
Application 18/145,348 is a division of application No. 16/064,738, granted, now 11,569,506, previously published as PCT/IB2016/057840, filed on Dec. 20, 2016.
Claims priority of provisional application 62/270,317, filed on Dec. 21, 2015.
Prior Publication US 2023/0207808 A1, Jun. 29, 2023
Int. Cl. H01M 4/58 (2010.01); C01B 25/45 (2006.01); H01M 4/02 (2006.01); H01M 4/36 (2006.01); H01M 4/587 (2010.01); H01M 10/054 (2010.01)
CPC H01M 4/5825 (2013.01) [C01B 25/45 (2013.01); H01M 4/364 (2013.01); H01M 4/587 (2013.01); H01M 10/054 (2013.01); C01P 2002/72 (2013.01); C01P 2002/76 (2013.01); C01P 2002/77 (2013.01); C01P 2004/03 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of preparing a cathode material comprising a compound of general formula NahMiM′jM″kPO4, wherein: 0<h≤1, 0<i≤1, 0<j≤1 and 0<k≤1, and wherein M, M′ and M″ are each independently a metal, the method comprising the steps of:
(a) preparing an aqueous mixture comprising a M-containing compound, a M′-containing compound and a M″-containing compound to obtain a M-M′-M″ mixture;
(b) adding a P-containing compound to the M-M′-M″ mixture to obtain a M-M′-M″-P mixture;
(c) adding a Na-containing compound to the M-M′-M″-P mixture to obtain a Na-M-M′-M″-P mixture;
(d) introducing the Na-M-M′-M″-P mixture into an autoclave to perform crystal growth and obtain the compound of general formula NahMiM′jM″kPO4;
(e) fast-cooling the crystals; and
(f) drying the cooled crystals.