ALKALINE BATTERY WITH ELECTROLYTE GRADIENT

• Main Authors: BROST, KRISTINE M, WILKINS, DAVID, GARCIA, WILLIAM A, WILKINS, HOWARD F, KOSTED, RANDOLPH M, KOSTED, PAULA J, BROST, RONALD D, WEISENSTEIN, ADAM
• Format: Patent
• Language: English; French
• Published: 13.11.2014
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

A membrane electrode assembly includes a gas diffusion layer, a catalytic layer in fluid communication with the gas diffusion layer, an anodic layer and a bipolar solid electrolyte disposed between the catalytic and anodic layers. The bipolar solid electrolyte inhibits carbonate formation in air breathing alkaline cells and inhibits dendritic growth between the anodic and catalytic layers. Un assemblage membrane-électrodes comprend une couche de diffusion de gaz, une couche catalytique en communication fluidique avec la couche de diffusion de gaz, une couche anodique et un électrolyte solide bipolaire disposé entre la couche catalytique et la couche anodique. L'électrolyte solide bipolaire empêche la formation de carbonate dans les piles alcalines oxygénées à l'air et il empêche la croissance dendritique entre la couche anodique et la couche catalytique.