WO2019208806A1 - Batterie - Google Patents

Batterie Download PDF

Info

Publication number
WO2019208806A1
WO2019208806A1 PCT/JP2019/018060 JP2019018060W WO2019208806A1 WO 2019208806 A1 WO2019208806 A1 WO 2019208806A1 JP 2019018060 W JP2019018060 W JP 2019018060W WO 2019208806 A1 WO2019208806 A1 WO 2019208806A1
Authority
WO
WIPO (PCT)
Prior art keywords
positive electrode
active material
electrode active
battery
transition metal
Prior art date
Application number
PCT/JP2019/018060
Other languages
English (en)
Japanese (ja)
Inventor
伸之 岩根
堀内　博志
祐樹 庭田
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Publication of WO2019208806A1 publication Critical patent/WO2019208806A1/fr

Links

Images

Classifications

    • 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
    • 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
    • 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
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • 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 battery.
  • An object of the present invention is to provide a battery capable of improving cycle characteristics.
  • the cycle characteristics can be improved.
  • the positive electrode 21 includes a positive electrode current collector 21A and a positive electrode active material layer 21B provided on both surfaces of the positive electrode current collector 21A.
  • the positive electrode current collector 21A is made of, for example, a metal foil such as an aluminum foil, a nickel foil, or a stainless steel foil.
  • the positive electrode current collector 21A may have a plate shape or a mesh shape.
  • the positive electrode lead 11 may be configured by extending a part of the peripheral edge of the positive electrode current collector 21A.
  • the positive electrode active material layer 21B includes a positive electrode active material, a binder, and a conductive agent (conductive aid).
  • the content of nickel on the surface of the second particle is the lithium atom contained in the surface of the second particle (region having a depth of 30 nm or less from the outermost surface). It means the molar ratio of nickel to the total amount of atoms other than oxygen atoms.
  • the average particle diameter of the positive electrode active material particles is obtained as follows. First, the battery 10 is disassembled, the positive electrode 21 is taken out, the taken-out positive electrode 21 is washed with dimethyl carbonate (DMC) and dried, and then the positive electrode 21 is cut to collect a sample piece. Cross-sectional SEM observation is performed. Then, ten particles are randomly selected from the photographed SEM image, the area of the particle cross section is measured by image processing, and the particle diameter (diameter) of each particle is obtained assuming that the particle cross section is circular. Finally, the measured particle diameters of 10 particles are simply averaged (arithmetic average) to obtain the average particle diameter, which is defined as the average particle diameter of the positive electrode active material particles.
  • DMC dimethyl carbonate
  • These carbon materials are preferable because the change in crystal structure that occurs during charge and discharge is very small, a high charge and discharge capacity can be obtained, and good cycle characteristics can be obtained.
  • graphite is preferable because it has a high electrochemical equivalent and can provide a high energy density.
  • non-graphitizable carbon is preferable because excellent cycle characteristics can be obtained.
  • the charging / discharging potential is low, specifically, that the charging / discharging potential is close to that of lithium metal since the high energy density of the battery 10 can be easily realized.
  • Examples of such a negative electrode active material include a metal element or a metalloid element capable of forming an alloy with lithium.
  • a metal element or a metalloid element capable of forming an alloy with lithium.
  • These may be crystalline or amorphous.
  • Examples of other negative electrode active materials include metal oxides or polymer compounds that can occlude and release lithium.
  • Examples of the metal oxide include lithium titanium oxide containing titanium and lithium such as lithium titanate (Li 4 Ti 5 O 12 ), iron oxide, ruthenium oxide, or molybdenum oxide.
  • Examples of the polymer compound include polyacetylene, polyaniline, polypyrrole, and the like.
  • the same material as the positive electrode active material layer 21B can be used.
  • a non-woven fabric may be used as the base material.
  • fibers constituting the nonwoven fabric aramid fibers, glass fibers, polyolefin fibers, polyethylene terephthalate (PET) fibers, nylon fibers, or the like can be used. Moreover, it is good also as a nonwoven fabric by mixing these 2 or more types of fibers.
  • the solvent preferably further contains 2,4-difluoroanisole or vinylene carbonate. This is because 2,4-difluoroanisole can improve discharge capacity, and vinylene carbonate can improve cycle characteristics. Therefore, it is preferable to use a mixture of these because the discharge capacity and cycle characteristics can be improved.
  • a battery cover 44, a safety valve mechanism 45 and a heat sensitive resistance element (Positive Temperature Coefficient; PTC element) 46 provided inside the battery cover 44 are interposed via a sealing gasket 47. It is attached by caulking. Thereby, the inside of the battery can 41 is sealed.
  • the battery lid 44 is made of the same material as the battery can 41, for example.
  • the safety valve mechanism 45 is electrically connected to the battery lid 44, and when the internal pressure of the battery exceeds a certain level due to an internal short circuit or external heating, the disk plate 15A is reversed and wound with the battery lid 44. The electrical connection with the rotating electrode body 50 is cut off.
  • the sealing gasket 47 is made of, for example, an insulating material, and the surface thereof is coated with asphalt.
  • the melting point of the binder is a value obtained by the measurement method described in the first embodiment.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

Le problème décrit par la présente invention est de fournir une batterie qui peut avoir des caractéristiques de cycle améliorées. À cet effet, l'invention concerne une batterie qui comprend une électrode positive, une électrode négative, et un électrolyte. L'électrode positive comprend une couche de matériau actif positif. La couche de matériau actif positif comprend des particules de matériau actif positif, un liant à base de fluor ayant un point de fusion de 152 à 166 °C, et une aide à la conduction. La surface de chaque particule de matériau actif positif est au moins partiellement recouverte d'un mélange du liant à base de fluor et de l'aide à la conduction, la surface des particules de matériau actif positif ayant un degré moyen de zones exposées de 32 à 55 %. Les particules de matériau actif positif comprennent un oxyde de métal de transition de lithium ayant une structure de type sel gemme stratifiée, le ou les métaux de transition étant du cobalt et/ou du nickel.
PCT/JP2019/018060 2018-04-27 2019-04-26 Batterie WO2019208806A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018087814 2018-04-27
JP2018-087814 2018-04-27

Publications (1)

Publication Number Publication Date
WO2019208806A1 true WO2019208806A1 (fr) 2019-10-31

Family

ID=68295583

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/018060 WO2019208806A1 (fr) 2018-04-27 2019-04-26 Batterie

Country Status (1)

Country Link
WO (1) WO2019208806A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020201874A1 (fr) * 2019-03-29 2020-10-08 株式会社半導体エネルギー研究所 Matériau actif d'électrode positive et batterie secondaire
JPWO2021171911A1 (fr) * 2020-02-26 2021-09-02

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002270180A (ja) * 2001-03-08 2002-09-20 Mitsubishi Cable Ind Ltd 正極活物質組成物およびそれを用いた正極板、ならびにリチウム二次電池
JP2003157830A (ja) * 2001-11-21 2003-05-30 Mitsubishi Cable Ind Ltd リチウムイオン二次電池
JP2006031987A (ja) * 2004-07-13 2006-02-02 Matsushita Electric Ind Co Ltd 非水電解液二次電池用正極活物質の製造方法
JP2014127256A (ja) * 2012-12-25 2014-07-07 Hitachi Maxell Ltd 非水電解質二次電池
WO2015076323A1 (fr) * 2013-11-22 2015-05-28 住友金属鉱山株式会社 Matériau actif d'électrode positive pour batteries rechargeables à électrolyte non aqueux, son procédé de fabrication, et batterie rechargeable à électrolyte non aqueux
WO2016017071A1 (fr) * 2014-07-31 2016-02-04 ソニー株式会社 Matériau actif d'électrode positive, électrode positive, batterie, bloc-batterie, équipement électronique, véhicule électrique, dispositif de stockage d'énergie et système électrique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002270180A (ja) * 2001-03-08 2002-09-20 Mitsubishi Cable Ind Ltd 正極活物質組成物およびそれを用いた正極板、ならびにリチウム二次電池
JP2003157830A (ja) * 2001-11-21 2003-05-30 Mitsubishi Cable Ind Ltd リチウムイオン二次電池
JP2006031987A (ja) * 2004-07-13 2006-02-02 Matsushita Electric Ind Co Ltd 非水電解液二次電池用正極活物質の製造方法
JP2014127256A (ja) * 2012-12-25 2014-07-07 Hitachi Maxell Ltd 非水電解質二次電池
WO2015076323A1 (fr) * 2013-11-22 2015-05-28 住友金属鉱山株式会社 Matériau actif d'électrode positive pour batteries rechargeables à électrolyte non aqueux, son procédé de fabrication, et batterie rechargeable à électrolyte non aqueux
WO2016017071A1 (fr) * 2014-07-31 2016-02-04 ソニー株式会社 Matériau actif d'électrode positive, électrode positive, batterie, bloc-batterie, équipement électronique, véhicule électrique, dispositif de stockage d'énergie et système électrique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020201874A1 (fr) * 2019-03-29 2020-10-08 株式会社半導体エネルギー研究所 Matériau actif d'électrode positive et batterie secondaire
JPWO2021171911A1 (fr) * 2020-02-26 2021-09-02
JP7302731B2 (ja) 2020-02-26 2023-07-04 株式会社村田製作所 二次電池

Similar Documents

Publication Publication Date Title
JP6115602B2 (ja) セパレータおよび電池
US20150349308A1 (en) Lithium Secondary Battery
JP2009117159A (ja) 正極及びリチウムイオン二次電池
US11398660B2 (en) Flame retardant separator having asymmetric structure for secondary batteries
JP2009004227A (ja) 正極合剤および非水電解質電池
US20210043941A1 (en) Battery
WO2020059803A1 (fr) Batterie secondaire
CN113892201A (zh) 负极活性物质、负极以及二次电池
JP6656370B2 (ja) リチウムイオン二次電池および組電池
US20210210789A1 (en) Secondary battery
WO2019208806A1 (fr) Batterie
JP2009054469A (ja) 非水二次電池
JP2005347222A (ja) 電解液および電池
US20220085411A1 (en) Secondary battery
US11929485B2 (en) Secondary battery
JP7143943B2 (ja) 負極活物質、負極および二次電池
WO2020059874A1 (fr) Batterie secondaire
US20200153035A1 (en) Positive electrode active material, positive electrode, battery, battery pack, electronic device, electric vehicle, power storage device, and power system
WO2020218019A1 (fr) Matériau actif d'électrode négative, électrode négative et batterie secondaire
JP6992903B2 (ja) 非水電解質二次電池
WO2020059873A1 (fr) Batterie secondaire
US20240047828A1 (en) Non-aqueous electrolyte secondary battery
WO2020059802A1 (fr) Batterie secondaire
WO2020218021A1 (fr) Matériau actif d'électrode négative, électrode négative et batterie secondaire
WO2020138317A1 (fr) Électrolyte non aqueux et élément secondaire à électrolyte non aqueux

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19791671

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19791671

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP