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AssigneeVRB Power Systems Inc.
InventorsMichael Kazacos, Maria Skyllas Kazacos
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Disclosed is a method for preparing a high energy density (HED) electrolyte solution for use in an all-vanadium redox cell, a high energy density electrolyte solution, in particular an all-vanadium high energy density electrolyte solution, a redox cell, in particular an all-vanadium redox cell, comprising the high energy density electrolyte solution, a redox battery, in particular an all-vanadium redox battery, comprising the HED electrolyte solution, a process for recharging a discharged or partially discharged redox battery, in particular an all-vanadium redox battery, comprising the HED electrolyte solution, a process for the production of electricity from a charged redox battery, and in particular a charged all-vanadium redox battery, comprising the HED electrolyte, a redox battery/fuel cell and a process for the production of electricity from a redox battery/fuel cell. A method for stabilising an electrolyte solution for use in a redox cell, in particular for stabilising an electrolyte solution for use in an all-vanadium redox cell, a stabilised electrolyte solution, in particular an all-vanadium stabilised electrolyte solution, a redox cell, in particular an all-vanadium redox cell, comprising the stabilised electrolyte solution, a redox battery, in particular an all-vanadium redox battery, comprising the stabilised electrolyte solution, a process for recharging a discharged or partially discharged redox battery, in particular an all-vanadium redox battery, comprising the stabilised electrolyte solution, and a process for the production of electricity from a charged redox battery, and in particular a charged all-vanadium redox battery, comprising the stabilised electrolyte solution are disclosed. Also disclosed are a redox battery/fuel cell and a process for the production of electricity from a redox battery/fuel cell.
An all-vanadium high energy density (“HED”) electrolyte solution for use in an all-vanadium redox cell, the electrolyte solution comprising vanadium redox ions in a high concentration and an electrolyte, the concentration of the electrolyte being such as to reduce precipitation of the vanadium redox ions from the electrolyte solution to a rate whereby the all-vanadium electrolyte solution is acceptable for use in an all-vanadium redox battery
A method of preparing an all-vanadium high energy density (“HED”) electrolyte solution for use in an all-vanadium redox cell, the electrolyte solution comprising vanadium redox ions in a high concentration and an electrolyte solution, the method comprising:
A method of preparing an all-vanadium high energy density (“HED”) electrolyte solution for use in an all-vanadium redox cell, the electrolyte solution comprising vanadium redox ions in a high concentration and an electrolyte solution, the method comprising:
An all-vanadium redox battery having a positive compartment containing a catholyte in electrical contact with a positive electrode, the catholyte comprising an electrolyte solution containing vanadium redox ions selected from the group consisting of an catholyte vanadium redox couple, catholyte vanadium redox ions and a mixture of an catholyte vanadium redox couple and catholyte vanadium redox ions, a negative compartment containing an anolyte in electrical contact with a negative electrode, the anolyte comprising an electrolyte solution containing vanadium redox ions selected from the group consisting of an anolyte vanadium redox couple, anolyte vanadium redox ions and a mixture of an anolyte vanadium redox couple and anolyte vanadium redox ions, and a separator or membrane disposed between the positive and negative compartments and in contact with the catholyte and anolyte to provide ionic communication therebetween, at least one of the electrolyte solutions being a high energy density electrolyte solution with a total sulphate (HSO4−+SO42−) concentration of 4-8M, means to maintain and/or control the operating conditions of the all-vanadium redox battery so as to substantially prevent or significantly reduce crystallisation or precipitation of vanadium substances/compounds from the catholyte and/or anolyte.
An all-vanadium redox battery having a positive compartment containing a catholyte in electrical contact with a positive electrode, the catholyte comprising an electrolyte solution containing vanadium redox ions selected from the group consisting of an catholyte vanadium redox couple, catholyte vanadium redox ions and a mixture of an catholyte vanadium redox couple and catholyte vanadium redox ions, a negative compartment containing an anolyte in electrical contact with a negative electrode, the anolyte comprising an electrolyte solution containing vanadium redox ions selected from the group consisting of an anolyte vanadium redox couple, anolyte vanadium redox ions and a mixture of an anolyte vanadium redox couple and anolyte vanadium redox ions, and a separator or membrane disposed between the positive and negative compartments and in contact with the catholyte and anolyte to provide ionic communication therebetween, the catholyte and/or anolyte having a vanadium ion or vanadium redox couple concentration from above a concentration selected from the group consisting of 2M, 2.1M, 2.25M, 2.5M, 2.75M, 3M, 3.25M, 3.5M, 3.75M, 4M, 4.5M, and 5M, up to a supersaturated concentration with a total sulphate (HSO4−+SO42−) concentration of 4-8M, and optionally means to maintain and/or control the operating conditions of the all-vanadium redox battery so as to substantially prevent or significantly reduce crystallisation or precipitation of vanadium substances/compounds from the catholyte and/or anolyte.
An all-vanadium redox battery having a positive compartment containing a catholyte in electrical contact with a positive electrode, the catholyte comprising an electrolyte solution containing vanadium ions selected from the group consisting of trivalent vanadium ions, tetravalent vanadium ions, pentavalent vanadium ions, and a mixture of at least two of trivalent vanadium ions, tetravalent vanadium ions, and pentavalent vanadium ions, a negative compartment containing an anolyte in electrical contact with a negative electrode, the anolyte comprising an electrolyte solution containing vanadium ions selected from the group consisting of tetravalent vanadium ions, trivalent vanadium ions, divalent vanadium ions, and a mixture of at least two of divalent vanadium ions, trivalent vanadium ions, and tetravalent vanadium ions, and a separator or membrane disposed between the positive and negative compartments and in contact with the catholyte and anolyte to provide ionic communication therebetween and wherein at least one of the electrolyte solutions has a vanadium ion or vanadium redox couple concentration from above a concentration selected from the group consisting of 2M, 2.1M, 2.25M, 2.5M, 2.75M, 3M, 3.25M, 3.5M, 3.75M, 4M, 4.5M, and 5M, up to a supersaturated concentration, and optionally means to maintain and/or control the operating conditions of the all-vanadium redox battery so as to substantially prevent or significantly reduce crystallisation or precipitation of vanadium substances/compounds from the catholyte and/or anolyte.
An all-vanadium redox battery having a positive compartment containing a catholyte in electrical contact with a positive electrode, the catholyte comprising an electrolyte solution containing from above a concentration selected from the group consisting of 2M, 2.1M, 2.25M, 2.5M, 2.75M, 3M, 3.25M, 3.5M, 3.75M, 4M, 4.5M, and 5M, up to a supersaturated concentration trivalent and/or tetravalent vanadium ions and/or pentavalent vanadium ions, a negative compartment containing an anolyte in electrical contact with a negative electrode, the anolyte comprising an electrolyte solution containing from above a concentration selected from the group consisting of 2M, 2.1M, 2.25M, 2.5M, 2.75M, 3M, 3.25M, 3.5M, 3.75M, 4M, 4.5M, and 5M, up to a supersaturated concentration, tetravalent vanadium ions, trivalent vanadium ions and/or divalent vanadium ions, and a separator or membrane disposed between the positive and negative compartments and in contact with the catholyte and anolyte to provide ionic communication therebetween, and optionally means to maintain and/or control the operating conditions of the all-vanadium redox battery so as to substantially prevent or significantly reduce crystallisation or precipitation of vanadium substances/compounds from the catholyte and/or anolyte.
A method of preparing a HED electrolyte solution of above saturated concentration for use in an all-vanadium redox cell, by dissolving and reducing a reducible vanadium compound disposed in, but not wholly dissolved in, an aqueous electrolyte solution comprising H2SO4, which process comprises adding a chemical reductant to the electrolyte solution to dissolve and reduce the compound in the electrolyte solution, and wherein the electrolyte solution is within a temperature range selected from the group consisting of 10-99° C., 25-99° C., 25-70° C., 26-60° C., or 35-60° C.;
A method of preparing a HED electrolyte solution of above saturated concentration for use in an all-vanadium redox cell, by dissolving and oxidising an oxidisable vanadium compound disposed in, but not wholly dissolved in, an aqueous electrolyte solution comprising H2SO4, which process comprises adding a chemical oxidant to the electrolyte solution to dissolve and oxidise the compound in the electrolyte solution, and wherein the electrolyte solution is within a temperature range selected from the group consisting of 10-99° C., 25-99° C., 25-70° C., 26-60° C., or 35-60° C.;
Dependencies are inferred from the claim text.