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US 10,374,257 B2Granted
Electrolyte solution and method for producing sulfate salt
AssigneeDaikin Industries, Ltd.
InventorsAtsushi Maruo, Hideo Sakata, Shinichi Kinoshita
Life of this patent
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Abstract
An electrolyte solution capable of providing electrochemical devices whose internal resistance is less likely to increase even after repeated charge and discharge and whose cycle capacity retention ratio is high. The electrolyte solution contains a solvent, an electrolyte salt, and at least one selected from the group consisting of compounds represented by R11X11—SO3M11 and compounds represented by R21R22N—SO3M21 in an amount of 0.001 to 10 mass % relative to the solvent.
Claims8
An electrolyte solution comprising:
- a solvent;
- an electrolyte salt;
- and
- at least one selected from the group consisting of compounds represented by the following formula (1) and compounds represented by the following formula (2) in an amount of 0.001 to 10 mass% relative to the solvent,
- the solvent containing a fluorinated acyclic carbonate,
- the formula (1) being R11X11—SO3M11
- wherein R11 is a C1-C6 linear or branched alkyl group, a C2-C6 linear or branched alkenyl group, a C2-C6 linear or branched alkynyl group, a C3-C6 cycloalkyl group, a C3-C6 cycloalkenyl group, or a C3-C6 alkylsilyl group, the alkyl group, the cycloalkyl group, and the alkylsilyl group may have a halogen atom which substitutes for a hydrogen atom bonding to a carbon atom, may have a cyclic structure, and may have an ether bond or a thioether bond;
- X11 is O or S;
- and M11 is at least one selected from the group consisting of Li, Na, K, and Cs, and
- the formula (2) being R21R22N—SO3 M21
- wherein R21 and R22 may be the same as or different from each other, and are individually a C1-C6 linear or branched alkyl group, a C2-C6 linear or branched alkenyl group, a C2-C6 linear or branched alkynyl group, a C3-C6 cycloalkyl group, a C3-C6 cycloalkenyl group, or a C3-C6 alkylsilyl group, the alkyl group, the cycloalkyl group, and the alkylsilyl group may have a halogen atom which substitutes for a hydrogen atom bonding to a carbon atom, may have a cyclic structure, and R21 and R22 may bond to each other to form a cyclic structure;
- and M21 is at least one selected from the group consisting of Li, Na, K, and Cs.
9 more elements
Dependencies are inferred from the claim text.