Zinc lanthanide sulfonic acid electrolytes
AssigneeArkema Inc.
InventorsNicholas Michael Martyak, Martin Nosowitz
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Abstract
Disclosed are aqueous solutions for use in high energy, highly efficient electrical energy storage devices. The solutions contain (a) a high purity sulfonic acid with a low concentration of low valent sulfur compounds or higher valent sulfur compounds susceptible to reduction, (b) a metal or metals in an oxidized state that are capable of being reduced to the zero valent oxidation state, (c) a metal that is in an oxidized state that is incapable of being reduced to its metallic state and (d) optionally, a buffering agent and/or conductivity salts.
Claims31
An aqueous solution for an electrochemical energy storage device which comprises (a) a high purity sulfonic acid with a low concentration of low valent sulfur compounds or higher valent sulfur compounds susceptible to reduction comprising a sum total concentration of dimethyldisulfide (CH3SSCH3), dimethylsulfide (CH3SCH3), dimethylsulfone (CH3SO2CH3), trichioromethyl methylsulfone (CH3SO2CCl3), dichloromethyl methylsulfone (CH3SO2CHCl2), methyl methanethiosulfonate (CH3SO2SCH3), and methyl methanesulfonate (CH3SO3CH3) of less than about 50 mg/l, (b) a metal or metals in an oxidized state capable of being reduced to the zero valent oxidation state, (c) a metal that is in an oxidized state that is incapable of being reduced to its metallic state, and optionally (d) a buffering agent and optionally (e) conductivity salts.
Dependencies are inferred from the claim text.