US 12,438,244 B2
Designs of high-power gel-assisted bipolar solid-state battery
Yong Lu, Shanghai (CN); Zhe Li, Shanghai (CN); Mengyan Hou, Shanghai (CN); Qili Su, Shanghai (CN); Meiyuan Wu, Shanghai (CN); Xiaochao Que, Shanghai (CN); Haijing Liu, Shanghai (CN); and Si Chen, Shanghai (CN)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Mar. 16, 2022, as Appl. No. 17/696,567.
Claims priority of application No. 202210107394.5 (CN), filed on Jan. 28, 2022.
Prior Publication US 2023/0246310 A1, Aug. 3, 2023
Int. Cl. H01M 10/0525 (2010.01); H01M 4/131 (2010.01); H01M 4/583 (2010.01); H01M 50/411 (2021.01); H01M 50/449 (2021.01); H01M 50/46 (2021.01); H01M 50/543 (2021.01); H01M 4/02 (2006.01)
CPC H01M 50/543 (2021.01) [H01M 4/131 (2013.01); H01M 4/583 (2013.01); H01M 10/0525 (2013.01); H01M 50/411 (2021.01); H01M 50/449 (2021.01); H01M 50/46 (2021.01); H01M 2004/029 (2013.01); H01M 2300/0082 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A high-power gel-assisted battery stack that cycles lithium ions comprising:
a first terminal electrode having a first polarity;
a second terminal electrode having a second polarity opposite from the first polarity;
at least one bipolar electrode assembly disposed between the first terminal electrode and the second terminal electrode,
the at least one bipolar electrode assembly having a first electrode with the first polarity disposed on a first side of a bipolar current collector and a second electrode with the second polarity opposite to the first polarity disposed on a second side of the bipolar current collector,
wherein the first electrode comprises;
a first porous layer comprising:
 a first electroactive material that reversibly cycles lithium ions; and
 a first solid state electrolyte disposed in a first polymeric binder, and
a first polymer gel electrolyte distributed in pores of the first porous layer,
wherein the first electrode has a capacity loading of about 1.05±0.1 mAh/cm2, a pressing density of about 2.3±0.3 g/cm3, and a moisture content less than or equal to about 600 ppm water, and
wherein the second electrode comprises;
a second porous layer comprising:
 a second electroactive material that reversibly cycles lithium ions; and
 a second solid state electrolyte disposed in a second polymeric binder, and
a second polymer gel electrolyte distributed in pores of the second porous layer,
wherein the second electrode has a capacity loading of about 1.15±0.1 mAh/cm2, a pressing density of about 1.6±0.2 g/cm3, and a moisture content less than or equal to about 500 ppm water; and
at least two free-standing gel separator layers,
wherein each of the at least two free-standing gel separator layers is disposed between the at least one bipolar electrode assembly and the first terminal electrode or between the at least one bipolar electrode assembly and the second terminal electrode, and
wherein each of the at least two free-standing gel separator layers comprises polyacrylonitrile (PAN) and a first electrolyte distributed therein,
wherein the high-power gel-assisted battery has a maximum voltage rating of greater than or equal to about 12V.