Method for passive metal activation and uses thereof
First Claim
1. An electrochemical cell device comprising an anode, a cathode, and an electrolyte, said anode comprises metallic aluminum as anodic fuel, said cathode is an air cathode and said electrolyte being a fluoroanion-containing composition, wherein:
- said electrolyte comprises at least one [(HF)nF]−
species, said at least one [(HF)nF]−
species exhibits measurable spectral features in said electrolyte,a surface of said anode exposed to said electrolyte comprises fluorohydrogenate-metal species (HF-species) such that said surface substantially exhibits said measurable spectral features after being washed with an organic solvent, andthe electrochemical cell device exhibits a discharge current higher than a corrosion current.
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Abstract
Disclosed is a method for activating a surface of metals, such as self-passivated metals, and of metal-oxide dissolution, effected using a fluoroanion-containing composition. Also disclosed is an electrochemical cell utilizing an aluminum-containing anode material and a fluoroanion-containing electrolyte, characterized by high efficiency, low corrosion, and optionally mechanical or electrochemical rechargeability. Also disclosed is a process for fusing (welding, soldering etc.) a self-passivated metal at relatively low temperature and ambient atmosphere, and a method for electrodepositing a metal on a self-passivated metal using metal-oxide source.
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Citations
6 Claims
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1. An electrochemical cell device comprising an anode, a cathode, and an electrolyte, said anode comprises metallic aluminum as anodic fuel, said cathode is an air cathode and said electrolyte being a fluoroanion-containing composition, wherein:
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said electrolyte comprises at least one [(HF)nF]−
species, said at least one [(HF)nF]−
species exhibits measurable spectral features in said electrolyte,a surface of said anode exposed to said electrolyte comprises fluorohydrogenate-metal species (HF-species) such that said surface substantially exhibits said measurable spectral features after being washed with an organic solvent, and the electrochemical cell device exhibits a discharge current higher than a corrosion current. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification