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AssigneeShell Oil Company
InventorsAdam Samuel Best, Hiske Landheer, Franciscus Güntherus Bernardus Ooms
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An electrochemical element for use at a high temperature has an anode, a cathode comprising an intercalation material having an upper reversible potential-limit of at most 4 V versus Li/Li+ as active material, and an electrolyte arranged between the cathode and anode, which electrolyte comprises an ionic liquid with an anion and a cation a pyrrolidinium ring structure having four Carbon atoms and one Nitrogen atom. Experiments revealed that rechargeable batteries comprising such an intercalation material and N—R1—N—R2-pyrrolidinium, wherein R1 and R2 are alkyl groups and R1 may be methyl and R2 may be butyl or hexyl, are particularly suitable for use at a temperature of up to about 150 degrees Celsius and may be used in oil and/or gas production wells.
An electrochemical device comprising a cathode, an anode and an electrolyte arranged between the cathode and anode, wherein the electrolyte comprises an ionic liquid comprising an anion and a cation, which cation has the formula N-methyl-N-hexyl-pyrrolidinium,
An electrochemical device comprising a cathode, an anode and an electrolyte arranged between the cathode and anode, wherein the electrolyte comprises an ionic liquid comprising an anion and a cation, which cation has a pyrrolidinium ring structure,
An electrochemical device comprising a cathode, an anode and an electrolyte arranged between the cathode and anode, wherein the electrolyte comprises an ionic liquid comprising an anion and a cation, wherein the cation has a pyrrolidinium ring structure, wherein the cathode comprises LiCrTiO4 as the major constituent by mass of the active material.
An electrochemical device comprising a cathode, an anode and an electrolyte arranged between the cathode and anode, wherein the electrolyte comprises an ionic liquid comprising an anion and a cation, wherein the cation has a pyrrolidinium ring structure, wherein the cathode comprises TiS2 as the major constituent by mass of the active material.
An electrochemical device comprising a cathode, an anode and an electrolyte arranged between the cathode and anode, wherein the which electrolyte comprises an ionic liquid comprising an anion and a cation, wherein the cation has a pyrrolidinium ring structure, wherein the cathode comprises Li1-yMyFePO4, where M=Mg, Nb, Zr, Ti, or Al and (0≦y≦0.02), as the major constituent by mass of the active material.
Dependencies are inferred from the claim text.