US 12,412,920 B2
Nanoscale pore structure cathode for high power applications and material synthesis methods
Chuanjing Xu, Ann Arbor, MI (US); Maha Hammoud, Westland, MI (US); Judith M. LaForest, Chelsea, MI (US); Hyojin Lee, Canton, MI (US); and Derek Johnson, Fort Collins, CO (US)
Assigned to A123 SYSTEMS LLC, Novi, MI (US)
Filed by A123 Systems LLC, Novi, MI (US)
Filed on Jan. 23, 2024, as Appl. No. 18/420,677.
Application 18/420,677 is a division of application No. 16/549,918, filed on Aug. 23, 2019, granted, now 11,916,185.
Application 16/549,918 is a division of application No. 15/739,665, granted, now 11,088,389, issued on Aug. 10, 2021, previously published as PCT/US2016/036473, filed on Jun. 8, 2016.
Claims priority of provisional application 62/294,888, filed on Feb. 12, 2016.
Claims priority of provisional application 62/185,457, filed on Jun. 26, 2015.
Prior Publication US 2024/0162477 A1, May 16, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 10/052 (2010.01); C01B 25/45 (2006.01); H01M 4/136 (2010.01); H01M 4/58 (2010.01)
CPC H01M 10/052 (2013.01) [C01B 25/45 (2013.01); H01M 4/136 (2013.01); H01M 4/5825 (2013.01); Y02T 10/70 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An electrochemical energy storage device, comprising:
a positive electrode with an electrochemically active material layer comprising a lithium iron phosphate electrochemically active material doped with vanadium and cobalt;
a negative electrode;
an ionic electrolyte solution that supports the movement of ions back and forth between the positive and negative electrodes, and
a porous separator that electrically isolates the positive and negative electrodes, wherein the lithium iron phosphate electrochemically active material is in the form of primary and secondary particles having respective pore structures, such that the lithium iron phosphate electrochemically active material has a bimodal pore size distribution, and wherein the bimodal pore size distribution has a first pore volume at a first pore width of about 2.5 nm, the first pore volume being larger than a pore volume of lithium iron phosphate synthesized from a spheniscidite precursor at the first pore width.