US 12,244,003 B2
Lithium tetraborate glass coating on cathode materials for improving safety and cycling stability
Weidong Zhou, Waltham, MA (US); Lixin Wang, Waltham, MA (US); Fu Zhou, South Grafton, MA (US); and Derek Johnson, Fort Collins, CO (US)
Assigned to A123 SYSTEMS LLC, Novi, MI (US)
Appl. No. 16/640,711
Filed by A123 Systems LLC, Novi, MI (US)
PCT Filed Aug. 21, 2018, PCT No. PCT/US2018/047392
§ 371(c)(1), (2) Date Feb. 20, 2020,
PCT Pub. No. WO2019/040533, PCT Pub. Date Feb. 28, 2019.
Claims priority of provisional application 62/548,882, filed on Aug. 22, 2017.
Prior Publication US 2020/0185709 A1, Jun. 11, 2020
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/366 (2013.01) [H01M 4/04 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/62 (2013.01); H01M 4/628 (2013.01); H01M 10/0525 (2013.01); H01M 2004/028 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A coating adhered to an active electrode material of an electrode of a battery cell to form a coated active electrode material, the coating comprising an amorphous glass comprising lithium, boron, and oxygen,
wherein the electrode is a cathode, wherein the active electrode material is an active cathode material, and wherein the coating is adhered to the active cathode material and fills pores of secondary particles of the active cathode material to increase a flash point of an electrolyte of the battery cell, and
wherein the active electrode material comprises NMC precursor NixMnyCo1-x-y (OH)2.