US 12,107,280 B2
Zinc-air electrochemical cells with carbon dioxide scavengers
Ian Pozdol, St. Louis, MO (US); Marc Syvertsen, St. Louis, MO (US); Tony Rubsam, St. Louis, MO (US); and Kokkie Schnetz, St. Louis, MO (US)
Assigned to Energizer Brands, LLC, St. Louis, MO (US)
Filed by Energizer Brands, LLC, St. Louis, MO (US)
Filed on Dec. 13, 2019, as Appl. No. 16/714,307.
Claims priority of provisional application 62/780,158, filed on Dec. 14, 2018.
Prior Publication US 2020/0194738 A1, Jun. 18, 2020
Int. Cl. H01M 12/06 (2006.01); H01M 50/117 (2021.01); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/124 (2021.01); H01M 50/129 (2021.01); H01M 50/138 (2021.01); H01M 50/14 (2021.01)
CPC H01M 50/1385 (2021.01) [H01M 12/06 (2013.01); H01M 50/117 (2021.01); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/124 (2021.01); H01M 50/129 (2021.01); H01M 50/14 (2021.01)] 7 Claims
OG exemplary drawing
 
1. A zinc-air battery comprising an air cathode, a zinc anode, an electrolyte, and a housing,
wherein:
the housing comprises an anode can and a cathode can with an insulating gasket therebetween;
the cathode can comprises multiple air ports;
the anode can defines an anode chamber;
the zinc-air battery comprises a cellulose air diffusion layer between the cathode can and the anode chamber;
an air reservoir is defined by the cathode can and the cellulose air diffusion layer having a first face proximal to the air reservoir and an opposite and second face proximal to a porous diffusion layer;
wherein the air reservoir and the cellulose air diffusion layer comprise a carbon dioxide scrubbing agent comprising a film or powder of lithium hydroxide combined with a hygroscopic material comprising polyvinyl alcohol.