WO2014083834A1 - Batterie secondaire à électrolyte non aqueux - Google Patents

Batterie secondaire à électrolyte non aqueux Download PDF

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Publication number
WO2014083834A1
WO2014083834A1 PCT/JP2013/006914 JP2013006914W WO2014083834A1 WO 2014083834 A1 WO2014083834 A1 WO 2014083834A1 JP 2013006914 W JP2013006914 W JP 2013006914W WO 2014083834 A1 WO2014083834 A1 WO 2014083834A1
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lithium
transition metal
secondary battery
metal oxide
electrolyte secondary
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PCT/JP2013/006914
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English (en)
Japanese (ja)
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元治 斉藤
竹内　崇
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三洋電機株式会社
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    • 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
    • H01M10/0569—Liquid materials characterised by the solvents
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G51/00—Compounds of cobalt
    • C01G51/40—Cobaltates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G51/00—Compounds of cobalt
    • C01G51/40—Cobaltates
    • C01G51/42—Cobaltates containing alkali metals, e.g. LiCoO2
    • C01G51/44—Cobaltates containing alkali metals, e.g. LiCoO2 containing manganese
    • C01G51/50—Cobaltates containing alkali metals, e.g. LiCoO2 containing manganese of the type [MnO2]n-, e.g. Li(CoxMn1-x)O2, Li(MyCoxMn1-x-y)O2
    • 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
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/76—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by a space-group or by other symmetry indications
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • 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 a non-aqueous electrolyte battery.
  • Non-Patent Document 1 As one of the next generation high-capacity positive electrode active materials, lithium-containing oxides produced by ion-exchange of sodium-containing oxides are currently being studied (see Non-Patent Document 1).
  • LiCoO 2 having a crystal structure belonging to R-3m that is currently in practical use is charged to about 50% of lithium in LiCoO 2 by charging until the positive electrode potential exceeds 4.6 V (vs. Li / Li + ). It is known that the crystal structure collapses and the capacity retention rate decreases when the above is extracted, and therefore, when the battery is charged to a high potential of 4.8 V (lithium reference), the capacity maintenance is extremely deteriorated and the capacity maintenance rate is deteriorated. Yes.
  • LiCoO 2 having a crystal structure belonging to space group P6 3 mc which is a kind of lithium-containing oxide produced by ion-exchange of sodium-containing oxide, has a positive electrode potential of 4.6 V (vs. Li / Li + ), The crystal structure is maintained even when about 80% of lithium in LiCoO 2 is extracted.
  • Patent Document 1 it is difficult to produce LiCoO 2 having a crystal structure belonging to the space group P6 3 mc. This LiCoO 2 is obtained by preparing Na 0.7 CoO 2 having a P2 structure and ion-exchanging sodium with lithium.
  • an object of the present invention is to provide a non-aqueous electrolyte battery that can extract a large amount of lithium (high capacity) from the structure despite the fact that it includes the R-3m structure and can further improve the capacity retention rate. is there.
  • the nonaqueous electrolyte battery of the present invention is a nonaqueous electrolyte battery comprising a positive electrode including a positive electrode active material, a negative electrode, and a nonaqueous electrolyte, wherein the positive electrode active material has a crystal structure belonging to the space group P6 3 mc.
  • a lithium-containing transition metal oxide and a lithium-containing transition metal oxide having a crystal structure belonging to space group R-3m, and the nonaqueous electrolyte contains a fluorinated cyclic carbonate and a fluorinated chain ester It is characterized by.
  • the battery cycle is improved while increasing the capacity.
  • a nonaqueous electrolyte secondary battery which is an example of an embodiment of the present invention includes a positive electrode including a positive electrode active material, a negative electrode, and a nonaqueous electrolyte including a nonaqueous solvent.
  • a separator between the positive electrode and the negative electrode.
  • the nonaqueous electrolyte secondary battery has, for example, a structure in which an electrode body in which a positive electrode and a negative electrode are wound via a separator and a nonaqueous electrolyte are accommodated in an exterior body.
  • the positive electrode includes, for example, a positive electrode current collector such as a metal foil and a positive electrode active material layer formed on the positive electrode current collector.
  • a positive electrode current collector such as a metal foil and a positive electrode active material layer formed on the positive electrode current collector.
  • the positive electrode active material layer preferably includes a conductive agent and a binder in addition to the positive electrode active material.
  • the positive electrode active material includes both a lithium-containing transition metal oxide having a crystal structure belonging to space group P6 3 mc and a lithium-containing transition metal oxide having a crystal structure belonging to space group R-3m.
  • the peak intensity (Ir) of the index 104 considered to be a peak derived from the positive electrode active material belonging to the space group R-3m and the index 103 considered to be a peak derived from the positive electrode active material belonging to the space group P6 3 mc
  • 0 ⁇ Ia ⁇ 7.00, 0 ⁇ Ib ⁇ 3 0.00 is preferably satisfied.
  • a positive electrode active material including both a lithium-containing transition metal oxide having a crystal structure belonging to space group P6 3 mc and a lithium-containing transition metal oxide having a crystal structure belonging to space group R-3m is Li x1 Na y1 Co ⁇ .
  • ⁇ is less than the above range, the average discharge potential decreases.
  • ⁇ is larger than the above range, the crystal structure tends to be broken when charged until the positive electrode potential reaches 4.6 V (vs. Li / Li + ) or higher. It is more preferable that ⁇ is in the range of 0.95 ⁇ ⁇ 1.0 because the energy density is further increased. Further, when ⁇ is larger than the above range, the average discharge potential is lowered.
  • At least one element selected from magnesium, nickel, zirconium, molybdenum, tungsten, aluminum, chromium, vanadium, cerium, titanium, iron, potassium, gallium, and indium may be added to the lithium-containing oxide.
  • the addition amount of these elements is preferably 10 mol% or less with respect to the total mol amount of cobalt and manganese.
  • the inorganic compound include an oxide, a phosphoric acid compound, and a boric acid compound.
  • An example of the oxide is Al 2 O 3 .
  • Lithium-containing oxides can be made by ion exchange of sodium, sodium-containing oxide sodium containing lithium, cobalt, and manganese not exceeding the molar amount of sodium into lithium.
  • Na y2 Co ⁇ M ⁇ O ⁇ (0.66 ⁇ y2 ⁇ 1.0, 0.95 ⁇ ⁇ 1, 0 ⁇ ⁇ 0.05, 1.9 ⁇ ⁇ ⁇ 2.1, where M is Co It can be produced by ion-exchanging a part of sodium contained in the sodium-containing oxide represented by (a metal element other than).
  • Examples of the method for ion-exchanging sodium to lithium include at least one selected from the group consisting of lithium nitrate, lithium sulfate, lithium chloride, lithium carbonate, lithium hydroxide, lithium iodide, lithium bromide, and lithium chloride.
  • a method of adding a molten salt bed of lithium salt to a sodium-containing transition metal oxide is mentioned.
  • a method of immersing a sodium-containing transition metal oxide in a solution containing at least one lithium salt can be given.
  • the remaining sodium forms a sodium oxide before ion exchange, an oxide in which lithium and sodium are present in one structure.
  • sodium lithium oxide belonging to the space group P-6m2 is known.
  • Battery characteristics can be improved because a certain amount of sodium oxide remains in lithium oxide.
  • lithium oxide after ion exchange examples include an O2 structure of a space group P6 3 mc, an O3 structure of R-3m, an O6 structure, and a T2 structure of a space group Cmca.
  • the positive electrode active material may contain various oxides belonging to various space groups in the form of a mixture or a solid solution, but 51% or more of the composition should be a lithium oxide belonging to the space group P6 3 mc. Is desirable, and more desirably 70% or more.
  • the conductive agent is used to increase the electrical conductivity of the positive electrode active material layer.
  • the conductive agent include carbon materials such as carbon black, acetylene black, ketjen black, and graphite. These may be used alone or in combination of two or more.
  • the above binder is used for maintaining a good contact state between the positive electrode active material and the conductive agent and enhancing the binding property of the positive electrode active material and the like to the surface of the positive electrode current collector.
  • the binder for example, polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVdF), or a modified product thereof is used.
  • the binder may be used in combination with a thickener such as carboxymethyl cellulose (CMC) or polyethylene oxide (PEO).
  • the positive electrode having the above structure can be charged until the positive electrode potential exceeds 4.6 V (vs. Li / Li + ).
  • the upper limit of the charge potential of the positive electrode is not particularly defined, but if it is too high, decomposition of the nonaqueous electrolyte is caused, and therefore, it is preferably 5.0 V (vs. Li / Li + ) or less.
  • the negative electrode includes, for example, a negative electrode current collector such as a metal foil, and a negative electrode active material layer formed on the negative electrode current collector.
  • a negative electrode current collector such as a metal foil
  • a negative electrode active material layer formed on the negative electrode current collector.
  • a metal foil that is stable in the potential range of the negative electrode such as copper a film in which a metal that is stable in the potential range of the negative electrode such as copper is arranged on the surface layer, or the like can be used.
  • the negative electrode active material layer preferably contains a binder in addition to the negative electrode active material capable of inserting and extracting lithium ions.
  • PTFE styrene-butadiene copolymer
  • the binder may be used in combination with a thickener such as CMC.
  • Examples of the negative electrode active material include natural graphite, artificial graphite, lithium, silicon, carbon, tin, germanium, aluminum, lead, indium, gallium, lithium alloy, carbon and silicon in which lithium is previously occluded, and alloys and mixtures thereof. Etc. can be used.
  • the non-aqueous electrolyte includes a non-aqueous solvent and an electrolyte salt dissolved in the non-aqueous solvent.
  • the nonaqueous electrolyte is not limited to a liquid electrolyte (nonaqueous electrolyte solution), and may be a solid electrolyte using a gel polymer or the like.
  • the non-aqueous solvent contains a fluorinated cyclic carbonate and a fluorinated chain ester. By using such a solvent, elution of the positive electrode can be suppressed.
  • the fluorinated cyclic carbonate is preferably a fluorinated cyclic carbonate in which a fluorine atom is directly bonded to a carbonate ring. Examples thereof include 4-fluoroethylene carbonate, 4,5-difluoroethylene carbonate, 4,4-difluoro. Examples thereof include ethylene carbonate, 4,4,5-trifluoroethylene carbonate, and 4,4,5,5-tetrafluoroethylene carbonate. Of these, 4-fluoroethylene carbonate and 4,5-difluoroethylene carbonate are more preferable because of their relatively low viscosity and high formability of a protective film on the negative electrode.
  • the content of the fluorinated cyclic carbonate is preferably 5 to 50% by volume, more preferably 10 to 40% by volume, based on the total amount of the nonaqueous electrolyte.
  • the fluorinated chain ester preferably contains at least one of a fluorinated chain carboxylate ester or a fluorinated chain carbonate ester.
  • fluorinated chain carboxylic acid ester examples include methyl acetate, ethyl acetate, propyl acetate, methyl propionate, or ethyl propionate partially or wholly fluorinated. Of these, methyl 3,3,3-trifluoropropionate is preferred because of its relatively low viscosity.
  • fluorinated chain carbonate examples include those in which part or all of hydrogen in dimethyl carbonate, ethyl methyl carbonate, diethyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, and methyl isopropyl carbonate is fluorinated. Of these, methyl 2,2,2-trifluoroethyl carbonate is preferred.
  • the content of the fluorinated chain ester is preferably 30 to 90% by volume, more preferably 50 to 90% by volume, based on the total amount of the nonaqueous electrolyte.
  • non-aqueous electrolyte in addition to the fluorinated cyclic carbonate ester and the fluorinated chain ester, a non-aqueous electrolyte conventionally used in non-aqueous electrolyte batteries can be used together.
  • cyclic carbonates include ethylene carbonate and propylene carbonate.
  • chain carbonate examples include dimethyl carbonate, ethyl methyl carbonate, and diethyl carbonate.
  • ethers include 1,2-dimethoxyethane.
  • the non-aqueous electrolyte includes an alkali metal salt conventionally used in non-aqueous electrolyte batteries. Examples thereof include LiPF 6 and LiBF 4 .
  • battery constituent members used in conventional nonaqueous electrolyte batteries can be used as necessary.
  • separator a porous sheet having ion permeability and insulating properties is used.
  • the porous sheet include a microporous thin film, a woven fabric, and a nonwoven fabric.
  • material of the separator polyolefin such as polyethylene and polypropylene is suitable.
  • Example 1 NaNO 3 , Co 3 O 4 , and TiO 2 (anatase type) were mixed so as to meet the stoichiometric ratio of Na 81/81 Co 79/81 Ti 1/81 O 2 . Then, the sodium containing transition metal oxide was obtained by hold
  • the obtained lithium-containing transition metal oxide was analyzed by powder X-ray diffraction, and as a result, it was found that it had a crystal structure belonging to the space group P6 3 mc and the space group R-3m (see FIG. 1).
  • the composition ratio of the obtained lithium-containing transition metal oxide was Li 0.905 Na 0.066 Co 0.988 Ti 0.012 . .
  • the obtained lithium-containing transition metal oxide was used as a positive electrode active material, and the positive electrode active material, acetylene black as a conductive agent, and polyvinylidene fluoride as a binder were mixed so that the mass ratio was 80:10:10. . Thereafter, N-methyl-2-pyrrolidone was added to the mixture to prepare a positive electrode mixture slurry. The obtained positive electrode mixture slurry was applied to a current collector made of an aluminum foil, and vacuum-dried at 110 ° C. to produce a working electrode 1.
  • a test cell shown in FIG. 2 was prepared using the working electrode 1, the counter electrode 2, the reference electrode 3, the separator 4, the nonaqueous electrolyte 5, and the container 6 under dry air having a dew point of ⁇ 50 ° C. or less. Note that lithium metal was used for the counter electrode 2 and the reference electrode 3. As the separator 4, a polyethylene separator was used.
  • the non-aqueous electrolyte 5 is a non-aqueous electrolyte in which 4-fluoroethylene carbonate (FEC) and methyl 3,3,3-trifluoropropionate (F-MP) are mixed so that the volume ratio is 2: 8.
  • FEC 4-fluoroethylene carbonate
  • F-MP methyl 3,3,3-trifluoropropionate
  • LiPF 6 dissolved at a concentration of 1.0 mol / L was used.
  • Electrode tabs 7 are attached to the working electrode 1, the counter electrode 2, and the reference electrode 3, respectively.
  • Example 2> Other than mixing NaNO 3 , Co 3 O 4 , TiO 2 (anatase type) and Mn 2 O 3 to match the stoichiometric ratio of Na 79/81 Co 79/81 Mn 1/81 Ti 1/81 O 2
  • a test cell was prepared in the same manner as in Example 1.
  • Example 3> Other than mixing NaNO 3 , Co 3 O 4 , TiO 2 (anatase type) and Mn 2 O 3 to match the stoichiometric ratio of Na 78/81 Co 78/81 Mn 2/81 Ti 1/81 O 2
  • Example 1 Other than mixing NaNO 3 , Co 3 O 4 , TiO 2 (anatase type) and Mn 2 O 3 to match the stoichiometric ratio of Na 78/81 Co 78/81 Mn 2/81 Ti 1/81 O 2
  • Example 1 Other than mixing NaNO 3
  • Example 4 Other than mixing NaNO 3 , Co 3 O 4 , TiO 2 (anatase type) and Mn 2 O 3 to match the stoichiometric ratio of Na 78/81 Co 78/81 Mn 1/81 Ti 2/81 O 2
  • a test cell was prepared in the same manner as in Example 1.
  • Example 5> Except that NaNO 3 , Co 3 O 4 , and TiO 2 (anatase type) were mixed in accordance with the stoichiometric ratio of Na 78/81 Co 78/81 Ti 3/81 O 2 , the same as in Example 1.
  • a test cell was prepared.
  • LiPF 6 was dissolved to a concentration of 1.0 mol / l in a non-aqueous electrolyte in which ethylene carbonate (EC) and ethyl methyl carbonate (EMC) were mixed at a volume ratio of 2: 8.
  • EC ethylene carbonate
  • EMC ethyl methyl carbonate
  • ⁇ Comparative Example 2> Other than mixing NaNO 3 , Co 3 O 4 , TiO 2 (anatase type) and Mn 2 O 3 to match the stoichiometric ratio of Na 79/81 Co 79/81 Mn 1/81 Ti 1/81 O 2 Produced a test cell in the same manner as in Comparative Example 1.
  • ⁇ Comparative Example 3> Other than mixing NaNO 3 , Co 3 O 4 , TiO 2 (anatase type) and Mn 2 O 3 to match the stoichiometric ratio of Na 78/81 Co 78/81 Mn 2/81 Ti 1/81 O 2 Produced a test cell in the same manner as in Comparative Example 1.
  • FIG. 1 shows LiCoO 2 (PDF # 75-0532) as an example of an XRD profile belonging to Examples 1 to 6, Comparative Examples 1 to 3, and space group R-3m.
  • the positive electrode active material having a positive electrode active material and the space group R-3m having a space group P6 3 mc are both present, since the structural change of the positive electrode active material having a space group R-3m is suppressed, Capacitance reduction due to structural changes accompanying cycles can be suppressed.
  • a positive electrode active material having a space group P6 3 mc and a positive electrode active material having a space group R-3m are produced by ion exchange of sodium oxide having a P2 structure (space group: P6 3 / mmc), and are subjected to XRD measurement. From this, it can be seen that the amount of the positive electrode active material having the space group R-3m is smaller than the amount of the positive electrode active material having the space group P6 3 mc.
  • 0 ⁇ Ia ⁇ 7.00 is preferable. More preferably, 0.07 ⁇ Ia ⁇ 7.00. Further, 0 ⁇ Ib ⁇ 3.00 is preferable. More preferably, 0.2 ⁇ Ib ⁇ 3.00.
  • Ia is larger than 7 and Ib is larger than 3, it is considered that structural deterioration is caused at a charging potential of 4.6 V (lithium reference) or higher.
  • the sealed battery according to the present invention is suitably used for electronic devices such as personal computers and mobile phones, and electric power sources such as electric vehicles and electric tools.

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Abstract

La présente invention concerne une batterie secondaire à électrolyte non aqueux munie d'une électrode positive qui comprend un matériau actif d'électrode positive, d'une électrode négative, et d'un électrolyte non aqueux, ledit matériau actif d'électrode positive comprenant un oxyde de métal de transition contenant du lithium ayant une structure cristalline qui appartient à un groupe spatial P63mc et un oxyde de métal de transition contenant du lithium ayant une structure cristalline qui appartient à un groupe spatial R-3m, et ledit électrolyte non aqueux comprenant des esters de carbonate cyclique fluorés et des esters à chaîne fluorée.
PCT/JP2013/006914 2012-11-29 2013-11-25 Batterie secondaire à électrolyte non aqueux WO2014083834A1 (fr)

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JP2012260420A JP2016027530A (ja) 2012-11-29 2012-11-29 非水電解質二次電池

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2016151983A1 (fr) * 2015-03-26 2016-09-29 三洋電機株式会社 Batterie rechargeable à électrolyte non aqueux
WO2023184275A1 (fr) * 2022-03-30 2023-10-05 宁德新能源科技有限公司 Matériau d'électrode positive, appareil électrochimique et dispositif électronique

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Publication number Priority date Publication date Assignee Title
JP6858797B2 (ja) * 2017-01-30 2021-04-14 パナソニック株式会社 非水電解質二次電池
WO2019039763A1 (fr) * 2017-08-22 2019-02-28 리켐주식회사 Électrolyte pour batterie secondaire au lithium et batterie secondaire au lithium le comprenant

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