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US 7,632,608 B2Granted
Ionic compound, electrolytic solution, electrochemical device and battery
AssigneeSony Corporation
InventorsHiroyuki Yamaguchi, Masayuki Ihara, Tadahiko Kubota
Life of this patent
Estimating the term…
Abstract
A battery capable of improving cycle characteristics is provided. An electrolytic solution impregnated with a separator includes an ionic compound with an asymmetric structure such as fluorotrifluoromethyl[oxalage-O,O′] lithium borate as an electrolyte salt. Thereby, compared to the case where an ionic compound with a symmetric structure such as bis[oxalate-O,O′] lithium borate or difluoro[oxalate-O,O′]lithium borate is included as an electrolyte salt, the conductivity of the electrolytic solution is improved.
Claims5
An ionic compound comprising:
- a structure shown in Chemical Formula 1:
- where Xn+ represents an ion of a Group 1A element or a Group 2A element in the short form of the periodic table of the elements, or an onium ion, M represents a transition metal, or a Group 3B element, a Group 4B element or a Group 5B element in the short form of the periodic table of the elements, Rf represents a fluorinated alkyl group or a fluorinated aryl group having a carbon number of 1 to 10, and Y represents ZC(CR2)dCZ, O2S(CR2)eSO2 or OC(CR2)eSO2 (Z represents ═O, a halogenated alkyl group or a halogen group, R represents a hydrogen group, an alkyl group, a halogenated alkyl group or a halogen group), and a, g and n each are an integer of 1 or 2, b, c and e each are an integer of 1 to 4, d is 0 or an integer of 1 to 4, and f and m each are an integer of 1 to 3.
An electrolytic solution comprising:
- a solvent;
- and
- an electrolyte salt shown in Chemical Formula 2:
- where Xn+ represents an ion of a Group 1A element or a Group 2A element in the short form of the periodic table of the elements, or an onium ion, M represents a transition metal, or a Group 3B element, a Group 4B element or a Group 5B element in the short form of the periodic table of the elements, Rf represents a fluorinated alkyl group or a fluorinated aryl group having a carbon number of 1 to 10, and Y represents ZC(CR2)dCZ, O2S(CR2)eSO2 or OC(CR2)eSO2 (Z represents ═O, a halogenated alkyl group or a halogen group, R represents a hydrogen group, an alkyl group, a halogenated alkyl group or a halogen group), and a, g and n each are an integer of 1 or 2, b, c and e each are an integer of 1 to 4, d is 0 or an integer of 1 to 4, and f and m each are an integer of 1 to 3.
1 more element
An electrochemical device comprising:
- an electrolytic solution including an electrolyte salt shown in Chemical Formula 3:
- where Xn+ represents an ion of a Group 1A element or a Group 2A element in the short form of the periodic table of the elements, or an onium ion, M represents a transition metal, or a Group 3B element, a Group 4B element or a Group 5B element in the short form of the periodic table of the elements, Rf represents a fluorinated alkyl group or a fluorinated aryl group having a carbon number of 1 to 10, and Y represents ZC(CR2)dCZ, O2S(CR2)eSO2 or OC(CR2)eSO2 (Z represents ═O, a halogenated alkyl group or a halogen group, R represents a hydrogen group, an alkyl group, a halogenated alkyl group or a halogen group), and a, g and n each are an integer of 1 or 2, b, c and e each are an integer of 1 to 4, d is 0 or an integer of 1 to 4, and f and m each are an integer of 1 to 3.
A battery comprising a cathode, an anode and an electrolytic solution, wherein
- the electrolytic solution includes an electrolyte salt shown in Chemical Formula 4:
- where Xn+ represents an ion of a Group 1A element or a Group 2A element in the short form of the periodic table of the elements, or an onium ion, M represents a transition metal, or a Group 3B element, a Group 4B element or a Group 5B element in the short form of the periodic table of the elements, Rf represents a fluorinated alkyl group or a fluorinated aryl group having a carbon number of 1 to 10, and Y represents ZC(CR2)dCZ, O2S(CR2)eSO2 or OC(CR2)eSO2 (Z represents ═O, a halogenated alkyl group or a halogen group, R represents a hydrogen group, an alkyl group, a halogenated alkyl group or a halogen group), and a, g and n each are an integer of 1 or 2, b, c and e each are an integer of 1 to 4, d is 0 or an integer of 1 to 4, and f and m each are an integer of 1 to 3.
Dependencies are inferred from the claim text.