AQUEOUS ELECTROLYTE FOR LITHIUM-AIR BATTERY

• Main Authors: MOUREAUX, FLORIAN, STEVENS, PHILIPPE, CHATENET, MARIAN, TOUSSAINT, GWENAELLE
• Format: Patent
• Language: English; French
• Published: 16.05.2013
• 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

The present invention relates to an electrochemical device, in particular a lithium-air battery with an aqueous electrolyte, comprising: a negative electrode compartment containing lithium metal; a positive electrode compartment comprising at least one positive air electrode making contact with an aqueous solution containing lithium hydroxide; and a solid electrode separating, in a gas- and fluid-tight manner, the negative electrode compartment from the positive electrode compartment, characterized in that the aqueous solution containing the lithium hydroxide furthermore contains at least one additive decreasing the solubility of the lithium ions. The invention also relates to a method for storing and releasing electrical energy using a lithium-air battery according to the invention. La présente invention concerne un dispositif électrochimique, en particulier une batterie de type lithium- air à électrolyte aqueux, comprenant un compartiment d'électrode négative contenant du lithium métallique, un compartiment d'électrode positive comprenant au moins une électrode positive à air, en contact avec une solution aqueuse contenant de l'hydroxyde de lithium, et un électrolyte solide séparant de façon étanche aux gaz et aux liquides le compartiment d'électrode négative du compartiment d'électrode positive, caractérisé en que ce la solution aqueuse contenant de l'hydroxyde de lithium contient en outre au moins un additif diminuant la solubilité des ions lithium. L'invention concerne également un procédé de stockage et de restitution d'énergie électrique utilisant une batterie lithium-air selon l'invention.