WO2018220795A1 - Solution électrolytique, et dispositif électrochimique - Google Patents

Solution électrolytique, et dispositif électrochimique Download PDF

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Publication number
WO2018220795A1
WO2018220795A1 PCT/JP2017/020472 JP2017020472W WO2018220795A1 WO 2018220795 A1 WO2018220795 A1 WO 2018220795A1 JP 2017020472 W JP2017020472 W JP 2017020472W WO 2018220795 A1 WO2018220795 A1 WO 2018220795A1
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Prior art keywords
negative electrode
mass
formula
group
electrochemical device
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PCT/JP2017/020472
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English (en)
Japanese (ja)
Inventor
馨 今野
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日立化成株式会社
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Application filed by 日立化成株式会社 filed Critical 日立化成株式会社
Priority to PCT/JP2017/020472 priority Critical patent/WO2018220795A1/fr
Priority to US16/615,666 priority patent/US11398643B2/en
Priority to KR1020197036220A priority patent/KR102561972B1/ko
Priority to EP18810812.0A priority patent/EP3637528A4/fr
Priority to CN201880035266.6A priority patent/CN110679030B/zh
Priority to JP2019521983A priority patent/JP7074132B2/ja
Priority to PCT/JP2018/014283 priority patent/WO2018220997A1/fr
Priority to KR1020197036221A priority patent/KR102576486B1/ko
Priority to US16/615,653 priority patent/US11411250B2/en
Priority to CN201880035267.0A priority patent/CN110710047B/zh
Priority to EP18810582.9A priority patent/EP3637527A4/fr
Priority to PCT/JP2018/021013 priority patent/WO2018221671A1/fr
Priority to JP2019521307A priority patent/JP7131553B2/ja
Priority to TW107118900A priority patent/TWI775863B/zh
Publication of WO2018220795A1 publication Critical patent/WO2018220795A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/54—Electrolytes
    • H01G11/58—Liquid electrolytes
    • H01G11/64—Liquid electrolytes characterised by additives
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0567—Liquid materials characterised by the additives
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to an electrolytic solution and an electrochemical device.
  • Patent Document 1 discloses a non-aqueous electrolyte battery electrolyte containing a specific siloxane compound in order to improve cycle characteristics and internal resistance characteristics.
  • an object of the present invention is to provide an electrolytic solution that can improve cycle characteristics of an electrochemical device. Another object of the present invention is to provide an electrochemical device having excellent cycle characteristics.
  • the present invention provides an electrolytic solution containing a compound represented by the following formula (1).
  • R 1 to R 3 each independently represents an alkyl group or a fluorine atom
  • R 4 represents an alkylene group
  • R 5 represents an organic group containing a sulfur atom.
  • R 5 is preferably a group represented by any of the following formula (2), formula (3) or formula (4).
  • R 6 represents an alkyl group, and * represents a bond.
  • R 7 represents an alkyl group, and * represents a bond.
  • R 8 represents an alkyl group, and * represents a bond.
  • At least one of R 1 to R 3 is preferably a fluorine atom.
  • the content of the compound represented by the formula (1) is preferably 10% by mass or less based on the total amount of the electrolytic solution.
  • the present invention provides, as a second aspect, an electrochemical device comprising a positive electrode, a negative electrode, and the above electrolytic solution.
  • the negative electrode preferably contains a carbon material.
  • the carbon material preferably contains graphite.
  • the negative electrode preferably further contains a material containing at least one element of the group consisting of silicon and tin.
  • the electrochemical device is preferably a non-aqueous electrolyte secondary battery or a capacitor.
  • an electrolytic solution capable of improving the cycle characteristics of an electrochemical device.
  • the electrochemical device excellent in cycling characteristics can be provided.
  • FIG. 5 is a graph showing evaluation results of cycle characteristics of Example 1 and Comparative Example 1.
  • 6 is a graph showing evaluation results of cycle characteristics of Examples 2 to 5 and Comparative Examples 2 to 3.
  • FIG. 1 is a perspective view showing an electrochemical device according to an embodiment.
  • the electrochemical device is a non-aqueous electrolyte secondary battery.
  • the nonaqueous electrolyte secondary battery 1 includes an electrode group 2 composed of a positive electrode, a negative electrode, and a separator, and a bag-shaped battery exterior body 3 that houses the electrode group 2.
  • a positive electrode current collecting tab 4 and a negative electrode current collecting tab 5 are provided on the positive electrode and the negative electrode, respectively.
  • the positive electrode current collecting tab 4 and the negative electrode current collecting tab 5 protrude from the inside of the battery outer package 3 to the outside so that the positive electrode and the negative electrode can be electrically connected to the outside of the nonaqueous electrolyte secondary battery 1, respectively. .
  • the battery outer package 3 is filled with an electrolytic solution (not shown).
  • the non-aqueous electrolyte secondary battery 1 may be a battery (coin type, cylindrical type, laminated type, etc.) having a shape other than the so-called “laminate type” as described above.
  • the battery outer package 3 may be a container formed of a laminate film, for example.
  • the laminate film may be a laminate film in which a resin film such as a polyethylene terephthalate (PET) film, a metal foil such as aluminum, copper, and stainless steel, and a sealant layer such as polypropylene are laminated in this order.
  • PET polyethylene terephthalate
  • metal foil such as aluminum, copper, and stainless steel
  • sealant layer such as polypropylene
  • FIG. 2 is an exploded perspective view showing an embodiment of the electrode group 2 in the nonaqueous electrolyte secondary battery 1 shown in FIG.
  • the electrode group 2 includes a positive electrode 6, a separator 7, and a negative electrode 8 in this order.
  • the positive electrode 6 and the negative electrode 8 are arranged so that the surfaces on the positive electrode mixture layer 10 side and the negative electrode mixture layer 12 side face the separator 7, respectively.
  • the positive electrode 6 includes a positive electrode current collector 9 and a positive electrode mixture layer 10 provided on the positive electrode current collector 9.
  • the positive electrode current collector 9 is provided with a positive electrode current collector tab 4.
  • the positive electrode current collector 9 is made of, for example, aluminum, titanium, stainless steel, nickel, baked carbon, conductive polymer, conductive glass, or the like.
  • the positive electrode current collector 9 may have a surface such as aluminum or copper that has been treated with carbon, nickel, titanium, silver, or the like for the purpose of improving adhesiveness, conductivity, and oxidation resistance.
  • the thickness of the positive electrode current collector 9 is, for example, 1 to 50 ⁇ m from the viewpoint of electrode strength and energy density.
  • the positive electrode mixture layer 10 contains a positive electrode active material, a conductive agent, and a binder.
  • the thickness of the positive electrode mixture layer 10 is, for example, 20 to 200 ⁇ m.
  • the positive electrode active material may be lithium oxide, for example.
  • the content of the positive electrode active material may be 80% by mass or more, 85% by mass or more, and 99% by mass or less based on the total amount of the positive electrode mixture layer.
  • the conductive agent may be a carbon black such as acetylene black or ketjen black, a carbon material such as graphite or graphene, or a carbon nanotube.
  • the content of the conductive agent may be, for example, 0.01% by mass or more, 0.1% by mass or more, or 1% by mass or more based on the total amount of the positive electrode mixture layer, and is 50% by mass or less, 30% by mass. Or 15% by mass or less.
  • binder examples include resins such as polyethylene, polypropylene, polyethylene terephthalate, polymethyl methacrylate, polyimide, aromatic polyamide, cellulose, and nitrocellulose; SBR (styrene-butadiene rubber), NBR (acrylonitrile-butadiene rubber), fluorine rubber Rubber such as isoprene rubber, butadiene rubber, ethylene-propylene rubber; styrene / butadiene / styrene block copolymer or hydrogenated product thereof, EPDM (ethylene / propylene / diene terpolymer), styrene / ethylene / butadiene / Thermoplastic elastomers such as ethylene copolymers, styrene / isoprene / styrene block copolymers or hydrogenated products thereof; syndiotactic-1, 2-polybutadiene, polyvinyl acetate, ethylene /
  • the content of the binder may be, for example, 0.1% by mass or more, 1% by mass or more, or 1.5% by mass or more based on the total amount of the positive electrode mixture layer, and is 30% by mass or less, 20% by mass. % Or less, or 10 mass% or less.
  • the separator 7 is particularly limited as long as it electrically insulates between the positive electrode 6 and the negative electrode 8 and allows ions to pass therethrough and has resistance to oxidation on the positive electrode 6 side and reduction on the negative electrode 8 side.
  • Examples of the material (material) of the separator 7 include resins and inorganic substances.
  • the separator 7 is preferably a porous sheet or a nonwoven fabric formed of polyolefin such as polyethylene or polypropylene from the viewpoint of being stable with respect to the electrolytic solution and having excellent liquid retention.
  • the separator 7 may be a separator in which a fibrous or particulate inorganic substance is adhered to a thin film substrate such as a nonwoven fabric, a woven fabric, or a microporous film.
  • the negative electrode 8 includes a negative electrode current collector 11 and a negative electrode mixture layer 12 provided on the negative electrode current collector 11.
  • the negative electrode current collector 11 is provided with a negative electrode current collector tab 5.
  • the negative electrode current collector 11 is made of copper, stainless steel, nickel, aluminum, titanium, baked carbon, conductive polymer, conductive glass, aluminum-cadmium alloy, or the like.
  • the negative electrode current collector 11 may be one in which the surface of copper, aluminum or the like is treated with carbon, nickel, titanium, silver or the like for the purpose of improving adhesiveness, conductivity, and reduction resistance.
  • the thickness of the negative electrode current collector 11 is, for example, 1 to 50 ⁇ m from the viewpoint of electrode strength and energy density.
  • the negative electrode mixture layer 12 contains, for example, a negative electrode active material and a binder.
  • the negative electrode active material is not particularly limited as long as it is a material capable of occluding and releasing lithium ions.
  • Examples of the negative electrode active material include carbon materials, metal composite oxides, oxides or nitrides of Group 4 elements such as tin, germanium, and silicon, lithium alone, lithium alloys such as lithium aluminum alloys, Sn, Si, and the like And metals capable of forming an alloy with lithium.
  • the negative electrode active material is preferably at least one selected from the group consisting of a carbon material and a metal composite oxide from the viewpoint of safety.
  • the negative electrode active material may be one of these alone or a mixture of two or more.
  • the shape of the negative electrode active material may be, for example, a particulate shape.
  • carbon materials examples include amorphous carbon materials, natural graphite, composite carbon materials in which a film of amorphous carbon material is formed on natural graphite, artificial graphite (resin raw materials such as epoxy resins and phenol resins, or petroleum, coal, etc. And the like obtained by firing a pitch-based raw material obtained from the above.
  • the metal composite oxide preferably contains one or both of titanium and lithium, and more preferably contains lithium.
  • the negative electrode active material may further include a material containing at least one element selected from the group consisting of silicon and tin.
  • the material containing at least one element selected from the group consisting of silicon and tin may be a compound containing at least one element selected from the group consisting of silicon or tin alone, silicon and tin.
  • the compound may be an alloy containing at least one element selected from the group consisting of silicon and tin.
  • nickel, copper, iron, cobalt, manganese, zinc, indium, silver An alloy containing at least one selected from the group consisting of titanium, germanium, bismuth, antimony and chromium.
  • the compound containing at least one element selected from the group consisting of silicon and tin may be an oxide, a nitride, or a carbide.
  • silicon oxide such as SiO, SiO 2 , LiSiO, etc.
  • silicon nitride such as Si 3 N 4 and Si 2 N 2 O
  • silicon carbide such as SiC
  • tin oxide such as SnO, SnO 2 and LiSnO.
  • the negative electrode mixture layer 12 preferably contains a carbon material as a negative electrode active material, more preferably contains graphite, more preferably carbon material, silicon and tin. And a mixture with a material containing at least one element selected from the group consisting of: and particularly preferably a mixture of graphite and silicon oxide.
  • the content of the material (silicon oxide) containing at least one element selected from the group consisting of silicon and tin in the mixture is 1% by mass or more, or 3% by mass or more based on the total amount of the mixture, It may be 30% by mass or less.
  • the content of the negative electrode active material may be 80% by mass or more, 85% by mass or more, and 99% by mass or less based on the total amount of the negative electrode mixture layer.
  • the binder and its content may be the same as the binder and its content in the positive electrode mixture layer described above.
  • the negative electrode mixture layer 12 may further contain a thickener in order to adjust the viscosity.
  • the thickener is not particularly limited, but may be carboxymethyl cellulose, methyl cellulose, hydroxymethyl cellulose, ethyl cellulose, polyvinyl alcohol, oxidized starch, phosphorylated starch, casein, salts thereof, and the like.
  • the thickener may be one of these alone or a mixture of two or more.
  • the content of the thickener may be 0.1% by mass or more, preferably 0.2% by mass or more, based on the total amount of the negative electrode mixture layer. More preferably, it is 0.5% by mass or more. From the viewpoint of suppressing a decrease in battery capacity or an increase in resistance between the negative electrode active materials, the content of the thickener may be 5% by mass or less, preferably 3% by mass based on the total amount of the negative electrode mixture layer. % Or less, and more preferably 2% by mass or less.
  • the electrolytic solution contains a compound represented by the following formula (1), an electrolyte salt, and a nonaqueous solvent.
  • R 1 to R 3 each independently represents an alkyl group or a fluorine atom
  • R 4 represents an alkylene group
  • R 5 represents an organic group containing a sulfur atom.
  • the alkyl group represented by R 1 to R 3 may have 1 or more carbon atoms and 3 or less carbon atoms.
  • R 1 to R 3 may be a methyl group, an ethyl group, or a propyl group, and may be linear or branched. At least one of R 1 to R 3 is preferably a fluorine atom.
  • Carbon number of the alkylene group represented by R 4 may be 1 or more, 2 or less, or 5 or less or 4 or less.
  • the alkylene group represented by R 4 may be a methylene group, an ethylene group, a propylene group, a butylene group, or a pentylene group, and may be linear or branched.
  • R 5 may be a group represented by the following formula (2) in one embodiment.
  • R 6 represents an alkyl group.
  • the alkyl group may be the same as the alkyl group represented by R 1 to R 3 described above. * Indicates a bond.
  • R 5 may be a group represented by the following formula (3) in another embodiment.
  • R 7 represents an alkyl group.
  • the alkyl group may be the same as the alkyl group represented by R 1 to R 3 described above. * Indicates a bond.
  • R 5 may be a group represented by the following formula (4) in other embodiments from the viewpoint of further improving the cycle characteristics of the electrochemical device.
  • R 8 represents an alkyl group.
  • the alkyl group may be the same as the alkyl group represented by R 1 to R 3 described above. * Indicates a bond.
  • the content of the compound represented by the formula (1) is preferably 0.001% by mass or more, more preferably 0.001% by mass or more, based on the total amount of the electrolytic solution, from the viewpoint of further improving the cycle characteristics of the electrochemical device. It is 005 mass% or more, More preferably, it is 0.01 mass% or more. From the same viewpoint, the content of the compound represented by the formula (1) is preferably 10% by mass or less, more preferably 7% by mass or less, and further preferably 5% by mass based on the total amount of the electrolytic solution. % Or less, particularly preferably 3% by mass or less.
  • the content of the compound represented by the formula (1) is preferably 0.001 to 10% by mass, 0.001 to 7 based on the total amount of the electrolytic solution, from the viewpoint of further improving the cycle characteristics of the electrochemical device.
  • the electrolyte salt may be a lithium salt, for example.
  • the lithium salt include LiPF 6 , LiBF 4 , LiClO 4 , LiB (C 6 H 5 ) 4 , LiCH 3 SO 3 , CF 3 SO 2 OLi, LiN (SO 2 F) 2 (Li [FSI], lithium bis Fluorosulfonylimide), LiN (SO 2 CF 3 ) 2 (Li [TFSI] (lithium bistrifluoromethanesulfonylimide), and LiN (SO 2 CF 2 CF 3 ) 2.
  • the lithium salt preferably contains LiPF 6 from the viewpoint of further improving solubility in a solvent, charge / discharge characteristics of a secondary battery, output characteristics, cycle characteristics, and the like.
  • the concentration of the electrolyte salt is preferably 0.5 mol / L or more, more preferably 0.7 mol / L or more, still more preferably 0.8 mol / L or more, based on the total amount of the nonaqueous solvent, from the viewpoint of excellent charge / discharge characteristics. Moreover, it is preferably 1.5 mol / L or less, more preferably 1.3 mol / L, and still more preferably 1.2 mol / L or less.
  • Nonaqueous solvents include, for example, ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, ⁇ -butyl lactone, acetonitrile, 1,2-dimethoxyethane, dimethoxymethane, tetrahydrofuran, dioxolane, methylene chloride, methyl acetate, etc. It may be.
  • the non-aqueous solvent may be one kind of these or a mixture of two or more kinds, preferably a mixture of two or more kinds.
  • the electrolytic solution may further contain other materials other than the compound represented by the formula (1), the electrolyte salt, and the solvent.
  • Other materials may be, for example, nitrogen, sulfur, or a heterocyclic compound containing nitrogen and sulfur, a cyclic carboxylic acid ester, a fluorine-containing cyclic carbonate, or other compounds having an unsaturated bond in the molecule.
  • the present inventors have clarified that the cycle characteristics are remarkably improved by applying the above-described electrolytic solution.
  • the present inventors infer the effects of using the above-described electrolyte as follows.
  • the compound represented by the formula (1) forms a stable film on the positive electrode or the negative electrode. Thereby, the fall of the output characteristic resulting from the decomposition product of electrolyte solution depositing on a positive electrode or a negative electrode is suppressed. Furthermore, the capacity
  • the manufacturing method of the nonaqueous electrolyte secondary battery 1 includes a first step of obtaining the positive electrode 6, a second step of obtaining the negative electrode 8, a third step of housing the electrode group 2 in the battery outer package 3, And a fourth step of injecting the electrolytic solution into the battery outer package 3.
  • the positive electrode mixture is treated with a doctor blade method,
  • the positive electrode 6 is obtained by coating on the positive electrode current collector 9 by a dipping method, a spray method or the like, and then volatilizing the dispersion medium.
  • a compression molding step using a roll press may be provided as necessary.
  • the positive electrode mixture layer 10 may be formed as a positive electrode mixture layer having a multilayer structure by performing the above-described steps from application of the positive electrode mixture to volatilization of the dispersion medium a plurality of times.
  • the dispersion medium may be water, 1-methyl-2-pyrrolidone (hereinafter also referred to as NMP), and the like.
  • the second step may be the same as the first step described above, and the method of forming the negative electrode mixture layer 12 on the negative electrode current collector 11 may be the same method as the first step described above. .
  • the separator 7 is sandwiched between the produced positive electrode 6 and negative electrode 8, and the electrode group 2 is formed.
  • the electrode group 2 is accommodated in the battery outer package 3.
  • the electrolytic solution is injected into the battery outer package 3.
  • the electrolytic solution can be prepared, for example, by first dissolving the electrolyte salt in a solvent and then dissolving other materials.
  • the electrochemical device may be a capacitor. Similar to the non-aqueous electrolyte secondary battery 1 described above, the capacitor may include an electrode group including a positive electrode, a negative electrode, and a separator, and a bag-shaped battery outer package that houses the electrode group. The details of each component in the capacitor may be the same as those of the non-aqueous electrolyte secondary battery 1.
  • Example 1 Lithium cobaltate (95% by mass) as a positive electrode active material, fibrous graphite (1% by mass) and acetylene black (AB) (1% by mass) as a conductive agent, and a binder (3% by mass) Were added sequentially and mixed.
  • NMP as a dispersion medium was added and kneaded to prepare a slurry-like positive electrode mixture.
  • a predetermined amount of this positive electrode mixture was uniformly and uniformly applied to an aluminum foil having a thickness of 20 ⁇ m as a positive electrode current collector. Then, after volatilizing the dispersion medium, the dispersion medium was compacted to a density of 3.6 g / cm 3 by pressing to obtain a positive electrode.
  • the positive electrode cut into a 13.5 cm 2 square is sandwiched between polyethylene porous sheets (trade name: Hypore (registered trademark), manufactured by Asahi Kasei Co., Ltd., thickness 30 ⁇ m) as a separator, and further a 14.3 cm 2 square.
  • the electrode group was fabricated by stacking the negative electrodes cut into pieces. This electrode group was accommodated in a container (battery exterior body) formed of an aluminum laminate film (trade name: aluminum laminate film, manufactured by Dai Nippon Printing Co., Ltd.). Subsequently, 1 mL of electrolyte solution was added in the container, the container was heat-welded, and the lithium ion secondary battery for evaluation was produced.
  • 1% by mass of vinylene carbonate (VC) with respect to the total amount of the mixed solution in a mixed solution of ethylene carbonate, dimethyl carbonate and diethyl carbonate containing 1 mol / L LiPF 6 is represented by the following formula (5).
  • the compound A to which 1% by mass (based on the total amount of the electrolytic solution) was added was used.
  • Example 1 a lithium ion secondary battery was produced in the same manner as in Example 1 except that Compound A was not used.
  • FIG. 3 shows the relationship between the number of cycles and the relative value of the discharge capacity.
  • Example 2 A lithium ion secondary battery was produced in the same manner as in Example 1 except that silicon oxide was further added as the negative electrode active material in Example 1 to produce a negative electrode.
  • Example 2 the content of Compound A is 0.1% by mass (Example 3), 0.5% by mass (Example 4), and 3% by mass (Example 5), respectively, based on the total amount of the electrolytic solution.
  • a lithium ion secondary battery was produced in the same manner as in Example 1 except for the change.
  • Example 2 A lithium ion secondary battery was produced in the same manner as in Example 2 except that Compound A was not used in Example 2.
  • Example 3 (Comparative Example 3) In Example 2, instead of Compound A, 4-fluoro-1,3-dioxolan-2-one (fluoroethylene carbonate; FEC) was added in an amount of 1% by mass based on the total amount of the electrolyte solution. Similarly, a lithium ion secondary battery was produced.
  • FEC fluoroethylene carbonate
  • the lithium ion secondary battery of Example 1 using graphite as the negative electrode active material and further applying an electrolytic solution containing 1% by mass of compound A is a comparison in which an electrolytic solution not containing compound A is applied.
  • the evaluation of the cycle characteristics was good.
  • FIG. 4 an implementation in which an anode active material containing graphite and silicon oxide was used, and an electrolytic solution containing 1% by mass, 0.1% by mass, 0.5% by mass, and 3% by mass of Compound A was applied.
  • the lithium ion secondary batteries of Examples 2 to 5 had better evaluation of cycle characteristics than the lithium ion secondary batteries of Comparative Example 2 and Comparative Example 3 to which the electrolyte solution containing no compound A was applied. Although this mechanism is not necessarily clear, since the compound A formed a stable film on the positive electrode or the negative electrode, it was possible to suppress a decrease in output characteristics due to the decomposition product of the electrolyte depositing on the positive electrode or the negative electrode. Conceivable. Further, the stable film formation suppresses side reactions such as electrolyte decomposition in the vicinity of the electrode and a decrease in capacity of the lithium ion secondary battery, and it is considered that the cycle characteristics are improved by these effects.
  • non-aqueous electrolyte secondary battery electrochemical device
  • 6 positive electrode
  • 7 separator
  • 8 negative electrode

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Abstract

L'invention fournit une solution électrolytique qui comprend un composé représenté par la formule (1). [Dans la formule (1), Ｒ１ à Ｒ３ représentent, chacun de manière indépendante, un groupe alkyle ou un atome de fluor, Ｒ４ représente un groupe alkylène, et Ｒ５ représente un groupe organique contenant un atome de soufre.]
PCT/JP2017/020472 2017-06-01 2017-06-01 Solution électrolytique, et dispositif électrochimique WO2018220795A1 (fr)

Priority Applications (14)

Application Number Priority Date Filing Date Title
PCT/JP2017/020472 WO2018220795A1 (fr) 2017-06-01 2017-06-01 Solution électrolytique, et dispositif électrochimique
US16/615,666 US11398643B2 (en) 2017-06-01 2018-04-03 Electrolytic solution and electrochemical device
KR1020197036220A KR102561972B1 (ko) 2017-06-01 2018-04-03 전해액 및 전기화학 디바이스
EP18810812.0A EP3637528A4 (fr) 2017-06-01 2018-04-03 Solution électrolytique, et dispositif électrochimique
CN201880035266.6A CN110679030B (zh) 2017-06-01 2018-04-03 电解液及电化学装置
JP2019521983A JP7074132B2 (ja) 2017-06-01 2018-04-03 電解液及び電気化学デバイス
PCT/JP2018/014283 WO2018220997A1 (fr) 2017-06-01 2018-04-03 Solution électrolytique, et dispositif électrochimique
KR1020197036221A KR102576486B1 (ko) 2017-06-01 2018-05-31 전해액 및 전기화학 디바이스
US16/615,653 US11411250B2 (en) 2017-06-01 2018-05-31 Electrolytic solution and electrochemical device
CN201880035267.0A CN110710047B (zh) 2017-06-01 2018-05-31 电解液和电化学装置
EP18810582.9A EP3637527A4 (fr) 2017-06-01 2018-05-31 Solution électrolytique, et dispositif électrochimique
PCT/JP2018/021013 WO2018221671A1 (fr) 2017-06-01 2018-05-31 Solution électrolytique, et dispositif électrochimique
JP2019521307A JP7131553B2 (ja) 2017-06-01 2018-05-31 電解液及び電気化学デバイス
TW107118900A TWI775863B (zh) 2017-06-01 2018-06-01 電解液及電化學裝置

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Citations (5)

* Cited by examiner, † Cited by third party
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WO2016006488A1 (fr) * 2014-07-07 2016-01-14 株式会社Adeka Électrolyte non aqueux pour condensateur, et condensateur
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