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WO1999031746A1 - Electrode de batterie non aqueuse et batterie utilisant cette electrode - Google Patents

Electrode de batterie non aqueuse et batterie utilisant cette electrode Download PDF

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Publication number
WO1999031746A1
WO1999031746A1 PCT/JP1997/004667 JP9704667W WO9931746A1 WO 1999031746 A1 WO1999031746 A1 WO 1999031746A1 JP 9704667 W JP9704667 W JP 9704667W WO 9931746 A1 WO9931746 A1 WO 9931746A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
battery
polyvinyl alcohol
degree
negative electrode
Prior art date
Application number
PCT/JP1997/004667
Other languages
English (en)
Japanese (ja)
Inventor
Michio Murai
Takayuki Inuzuka
Yasuhiro Yoshida
Hisashi Shiota
Shigeru Aihara
Daigo Takemura
Hiroaki Urushibata
Jun Aragane
Kouji Hamano
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
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 Mitsubishi Denki Kabushiki Kaisha filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to PCT/JP1997/004667 priority Critical patent/WO1999031746A1/fr
Publication of WO1999031746A1 publication Critical patent/WO1999031746A1/fr

Links

Classifications

    • 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
    • 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
    • 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
    • H01M4/621—Binders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/04—Cells with aqueous electrolyte
    • H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
    • H01M6/10—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with wound or folded electrodes
    • 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 battery electrode and a non-aqueous battery using the same. More specifically, the present invention relates to an electrode formed using a binder and a battery using the electrode.
  • Non-aqueous batteries have attracted attention because satisfying such demands is impossible with conventional batteries using a common aqueous electrolyte.
  • the lithium-ion battery is a secondary battery that is expected to achieve the highest voltage and the highest energy density among batteries to date, and improvements are being actively made at present.
  • binders for electrodes for non-aqueous batteries such as lithium ion batteries, for example, as disclosed in Japanese Patent Application Laid-Open No. 63-121262, polyvinyl fluoride and polyvinylidene fluoride are disclosed. And fluoropolymers such as copolymers thereof.
  • NMP N-methyl-2-pyrrolidone
  • Japanese Patent Application Laid-Open No. Sho 63-121212 discloses an example in which PVDF Koborimar is used as a binder. This solves the problem that PVDF homopolymer is soluble only in limited solvents such as NMP by using PVDF copolymer.
  • PVDF and its copolymers have been used as binders for non-aqueous battery electrodes.However, PVDF and its copolymers dissolve or swell in electrolyte at high temperatures. However, a battery using such an electrode has a problem that the charge / discharge characteristics are deteriorated at a high temperature.
  • the present invention has been made to solve the above problems, and has good electrical contact between electrode active materials without the electrode binder dissolving or swelling in the electrolytic solution even at a high temperature.
  • An object of the present invention is to form an electrode body, thereby obtaining a practical non-aqueous battery with high reliability, high charge / discharge characteristics, and high heat resistance at low cost and efficiency. Disclosure of the invention
  • a first non-aqueous battery electrode according to the present invention is a non-aqueous battery electrode having an electrode active material bound with a binder, wherein the binder contains polyvinyl alcohol.
  • a second non-aqueous battery electrode according to the present invention is the above-mentioned first non-aqueous battery electrode, wherein the degree of saponification of polyvinyl alcohol is 97% or more.
  • the third non-aqueous battery electrode according to the present invention includes the first non-aqueous battery electrode.
  • the degree of polymerization of polyvinyl alcohol is 170 or more.
  • a fourth nonaqueous battery electrode according to the present invention is the third nonaqueous battery electrode, wherein the degree of saponification of polyvinyl alcohol is 97% or more.
  • a first battery according to the present invention is a battery including an electrode laminate including an electrolyte layer and an electrode for a non-aqueous battery having an electrode active material bound by a binder containing polyvinyl alcohol.
  • a second battery according to the present invention is the first battery, wherein the degree of saponification of polyvinyl alcohol is 97% or more.
  • a third battery according to the present invention is the first battery, wherein the degree of polymerization of polyvinyl alcohol is 170 or more.
  • a fourth battery according to the present invention is the above-described third battery, wherein the degree of saponification of polyvinyl alcohol is 97% or more.
  • a fifth battery according to the present invention is a battery according to the first battery, having a plurality of layers of the electrode laminate.
  • the binder contains polyvinyl alcohol, it is possible to realize high heat resistance, excellent electrolyte solution resistance of the electrode active material layer in a wide temperature range, and high battery charge / discharge characteristics. In addition, a reliable battery can be obtained over a wide temperature range, and the charge / discharge characteristics are high, so that a practical battery can be obtained.
  • the battery charge / discharge characteristics can be further improved.
  • FIG. 1 is a schematic cross-sectional view illustrating one embodiment of a battery according to the present invention.
  • FIGS. 2, 3, and 4 illustrate other embodiments of the battery according to the present invention. It is a principal part cross section schematic diagram. BEST MODE FOR CARRYING OUT THE INVENTION
  • the present inventors have conducted intensive studies on a non-aqueous battery having excellent charge / discharge characteristics and heat resistance and an electrode thereof, and as a result, have reached the present invention.
  • the present invention provides a positive electrode 1 having a positive electrode active material layer 3 in which a positive electrode active material is bound to a positive electrode current collector 2 by a binder, and a negative electrode A negative electrode 4 having a negative electrode active material layer 6 to which an active material is bound; and an electrolyte layer 9 between the positive electrode 1 and the negative electrode 4, i.e., a separator 7 holding a non-aqueous electrolyte.
  • Battery Although the adhesive layer 8 shown in the figure is not required, the structure in which the positive electrode 1 and the negative electrode 4 are joined to the separator 7 with the adhesive layer 8 eliminates the need for a strong outer can, and is lightweight, thin, and of any shape. Battery is obtained.
  • the battery case 10 and the current collector 11 are further provided, and the electrode active material layers 3 and 6 and the separator 7 bound by a binder contain a non-aqueous electrolyte.
  • a feature of the present invention is that the positive electrode active material and the negative electrode active material (both are referred to as electrode active materials) are bound to form the electrode active material layers 3 and 6, and the active material layers 3 and 6 and the current collector 2 are combined.
  • the composition of the binder that bonds 5 and 5 is in the composition.
  • the present inventors have conducted various studies on a secondary battery that has been studied as to how thin and reliable the battery can be, and that the charge / discharge efficiency is increased.
  • the binder contains polyvinyl alcohol in the binder. It has been found that the use of a non-aqueous battery ensures high reliability, high charge / discharge efficiency, and high heat resistance, and has completed the present invention. That is, the present inventors have accumulated various researches and found that polyvinyl alcohol is excellent in electrolytic solution resistance and exhibits strong adhesive strength as a binder for forming the electrode binder, that is, the positive electrode 1 and the negative electrode 4. However, they have found that an electrode body having good electrical contact between electrode active materials can be formed and maintained without dissolving or swelling in an electrolytic solution even at a high temperature.
  • Examples of the polar organic solvent contained in the electrolyte include propylene carbonate, acetyl lactone, ethylene carbonate, tetrahydrofuran, 2-tetrahydrofuran, 1,3-dioxolan, and 4,4-dimethyl-1,3—
  • Use dioxolane getylcarbonate, dimethylcarbonate, sulfolane, 3-methylsulfolane, tert-butylethyl, iso-butylethyl, 1,2-dimethyloxetane, 1,2-ethoxymethoxetane, etc. Can be.
  • the form of the battery using the non-aqueous battery electrode obtained by the present invention is not particularly limited.
  • a positive electrode, a negative electrode and a negative electrode as shown in FIG.
  • An electrode stack comprising a single layer of an electrode stack consisting of an electrolyte layer (separator).
  • an electrode stack with a positive electrode and a negative electrode alternately arranged in a separated separator overnight.
  • a positive electrode and a negative electrode were alternately arranged between the rolled-up separators as shown in FIGS. 3 and 4 to form a plurality of layers of an electrode laminate.
  • Examples include a wound battery and a polymer gel battery using a polymer gel containing an electrolyte as an electrolyte.
  • the binder of the present invention When the binder of the present invention is used, a method in which an electrode active material is dispersed in a binder solution obtained by dissolving the binder in a solvent is used as a coating liquid. A method of applying a solution or a dispersion of the binder is mentioned as an example.
  • the amount of the binder to be used is not particularly limited. 0.1 to 20 parts by weight, preferably 0.5 to 10 parts by weight.
  • the solvent for dissolving the binder include N-methyl-2-pyrrolidone and dimethyl sulfoxide.
  • Is not particularly limited electrode active material used in the present invention if example embodiment, Mn_ ⁇ 2, Mo 0 3, V 2 0 5, V 6 ⁇ 13, F e 2 0 3, F e 3 ⁇ 4 , L - x) C o 0 2, L i (1 - x) N i 0 2, N I_ ⁇ 2, T i S 2, Mo S 3, F e S 2, CuF 2, N i F 2 , etc.
  • Inorganic compounds fluorinated carbon, graphite, vapor grown carbon fiber and / or its crushed material, polyacrylonitrile-based carbon fiber and / or its crushed material, pitch-based carbon fiber and / or its crushed material
  • Examples include conductive materials such as carbon materials, polyacetylene, and poly (p-phenylene).
  • the method of manufacturing the electrode will be described using a lithium ion secondary battery as an example. That is, the binder of the present invention, the electrode active material, and a solvent for dissolving the binder in a non-aqueous system are uniformly mixed, and the obtained paste is prepared by a conventionally known method such as a copper foil, an aluminum foil or a stainless steel foil as a current collector.
  • the electrode film is uniformly applied to the metal foil and dried by heating at 60 to 150 ° C. for 3 to 120 minutes to form an electrode film in which the electrode active material is bound to the metal foil by the binder.
  • Examples of the solvent for dissolving the binder used to obtain the above paste include N-methyl-2-pyrrolidone, dimethyl sulfoxide, ⁇ -butyrolactone, and a mixed solvent obtained by combining these. be able to.
  • any material having sufficient strength such as a porous film made of an electrically insulating material, a net, and a nonwoven fabric, can be used.
  • the material is not particularly limited, but a single porous film or a laminated porous film of polyethylene or polypropylene is preferable from the viewpoint of battery performance.
  • the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.
  • the positive electrode active material paste prepared by heating and mixing was adjusted to a thickness of 300 ⁇ m by the doctor blade method to form an active material thin film.
  • An aluminum foil with a thickness of 30 ⁇ m serving as the positive electrode current collector is placed on the upper part, and the thickness of the aluminum foil is adjusted to 300 / zm by a dough-blade method to apply the positive electrode active material paste. Applied. This was left to dry in a dryer at 60 ° C for 60 minutes.
  • a positive electrode was produced by rolling the produced laminate to 400 ⁇ m.
  • the negative electrode active material paste prepared by mixing was applied to a thickness of 300 / zm while adjusting the thickness to 300 / zm by a docu-blade method to form an active material thin film.
  • a 20-m-thick strip-shaped copper foil serving as a negative electrode current collector is placed on the upper part, and the upper part is adjusted to a thickness of 300 // m by a dough-blade method to apply the negative-electrode active material paste. Applied. This was left to dry in a dryer at 60 ° C for 60 minutes.
  • a negative electrode was fabricated by rolling the fabricated laminate to 400 m.
  • the positive and negative electrodes obtained as described above were cut into 5 cm x 5 cm, and assembled as shown in Fig. 1 to assemble a battery.
  • the charge / discharge characteristics of the assembled battery were measured under the following conditions, for example, by the method described in the Battery Handbook (Battery Handbook Editing Committee, published by Maruzen 1990).
  • Charge / discharge efficiency (%) Discharge electric capacity ⁇ Charge electric capacity X 100
  • the charge / discharge was repeated at 100 cycles at 25 ° C. and 80 ° C.
  • the charge / discharge characteristics at the first cycle and at the 100th cycle were determined based on the following criteria (A) and (X). The results are shown in Table 1.
  • Example 2 In place of the polyvinyl alcohol having a degree of polymerization of 300 and a degree of saponification of 97% used in Example 1 above, polyvinyl alcohol having a degree of polymerization of 1,000 and a degree of saponification of 97% was used, and the other conditions were the same as in Example 1. .
  • polyvinyl alcohol having a degree of polymerization of 300 and a degree of saponification of 97% used in Example 1 above, polyvinyl alcohol having a degree of polymerization of 1700 and a degree of saponification of 97% was used. did.
  • polyvinyl alcohol having a polymerization degree of 300 and a saponification degree of 97% used in Example 1 above, polyvinyl alcohol having a polymerization degree of 2400 and a saponification degree of 97% was used, and the other conditions were the same as in Example 1. I made it.
  • polyvinyl alcohol having a polymerization degree of 300 and a saponification degree of 97% used in Example 1 above, polyvinyl alcohol having a polymerization degree of 300 and a saponification degree of 85% was used, and the other conditions were the same as in Example 1. did.
  • Example 2 In place of the polyvinyl alcohol having a polymerization degree of 300 and a saponification degree of 97% used in Example 1 above, a polyvinyl alcohol having a polymerization degree of 1 000 and a saponification degree of 85% was used. Same as.
  • polyvinyl alcohol having a polymerization degree of 300 and a saponification degree of 97% used in Example 1 above, polyvinyl alcohol having a polymerization degree of 1700 and a saponification degree of 85% was used, and the other conditions were the same as in Example 1. did.
  • Example 2400 instead of the polyvinyl alcohol having a degree of polymerization of 300 and a degree of saponification of 97% used in Example 1 above, the polymer having a degree of polymerization of 2400 and a degree of saponification of 85% was used. The same operation as in Example 1 was performed except for using vinyl alcohol.
  • a battery having a plurality of layers of the electrode laminate shown in FIG. 2 was produced using the positive electrode and the negative electrode of Examples 1 to 8 described above.
  • NMP solution in which 3 wt% of the same polyvinyl alcohol as that used for the binder was dissolved was applied to one side of a porous polypropylene sheet (Celgard # 2400, manufactured by Hoechst) used as two separators 7. . Then, before the adhesive was dried, the positive electrode 1 (or the negative electrode) produced above was sandwiched between the separators and adhered to each other, bonded together, and dried at 80 ° C. The separator where the positive electrode 1 (or the negative electrode) is bonded is punched into a predetermined size, the NMP solution is applied to one surface of the separated separator, and the negative electrode 4 is punched into a predetermined size.
  • the positive and negative electrode current collectors of the flat plate-shaped laminated battery body and the current collecting tabs connected to the ends of the positive and negative electrode current collectors are spot-welded to each other between the positive electrode and the negative electrode. Connected in parallel.
  • the tabular laminated structure cell body (a molar ratio of 1: 1) mixed solvent of ethylene carbonate and Jimechiruka one Boneto. 1 to 6 Futsui spoon lithium phosphate O mo electrolyte dissolved in concentration of 1 / dm 3 After being immersed in the solution, the battery was sealed by heat fusion in a bag made of an aluminum laminate film.
  • Example 10 A battery having a plurality of layers of the electrode laminate shown in FIG. 3 was manufactured using the positive electrode and the negative electrode of Examples 1 to 8 described above.
  • the evening is rolled up in an elliptical shape, and the process of rolling up the separator while adhering another negative electrode (or positive electrode) is repeated to form a battery body having a plurality of electrode laminates, and drying while pressing this battery body Then, a flat wound type laminated structure battery body as shown in FIG. 3 was produced.
  • the current collector tabs connected to the respective ends of the positive electrode and the negative electrode current collector of the flat plate-shaped laminated battery body are spot-welded to each other between the positive electrode and the negative electrode, thereby electrically connecting the plate-shaped laminated battery element. Connected in parallel.
  • the tabular laminated structure cell body (a molar ratio of 1: 1) mixed solvent of ethylene carbonate and Jimechiruka one Boneto.
  • the negative electrode 4 (or the positive electrode) may be interposed between the separators while the band-shaped separator in which the positive electrode 1 (or the negative electrode) is joined is folded.
  • a battery having a plurality of layers of the electrode laminate shown in FIG. 4 was manufactured using the positive electrode and the negative electrode of Examples 1 to 8 described above.
  • the strip-shaped positive electrode 1 (or negative electrode) is placed between two strip-shaped separators made of a porous polypropylene sheet (Celgard # 2400, manufactured by Hoechst) to be used as separator 7 overnight.
  • the negative electrode 4 (or the positive electrode) is placed so as to protrude outside of one of the separators by a certain amount.
  • An NMP solution containing 3 wt% of the same polyvinyl alcohol as that used for the binder was applied to the inner surface of each separator and the outer surface of the separator where the negative electrode 4 (or positive electrode) was placed.
  • the positive and negative electrode current collectors connected to the ends of the positive and negative electrode current collectors of this flat plate-shaped laminated battery body are spot-welded to each other between the positive electrode and the negative electrode, so that the flat laminated battery element is electrically connected. Were connected in parallel.
  • This plate-shaped laminated structure battery was prepared by adding lithium 6-phosphate to a mixed solvent of ethylene carbonate and dimethyl carbonate (molar ratio: 1: 1). After being immersed in an electrolyte solution dissolved at a concentration of O mo 1 / dm 3 , the battery was sealed by heat fusion in a bag made of an aluminum laminate film;
  • Polyvinylidene fluoride was used in place of the polyvinyl alcohol having a degree of polymerization of 300 and a degree of saponification of 97% used in Example 1 above, and was otherwise the same as Example 1.
  • polyvinylidene fluoride: polyhexafluoropropylene 6: 4 (molar ratio)
  • It is used as a secondary battery for portable electronic devices such as mobile personal computers and mobile phones, and can be made smaller, lighter, and arbitrarily shaped as well as improving battery performance.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)

Abstract

La présente invention concerne une amélioration de la résistance électrolytique d'une électrode prévue pour une batterie utilisant un électrolyte non aqueux. L'électrode selon l'invention permet d'obtenir une batterie secondaire présentant une grande utilité avec des caractéristiques excellentes de charge/décharge et de résistance à la chaleur. Un liant comprenant un poly(alcool de vynile) permet de lier un matériau d'activation de l'électrode et de former une électrode de manière à produire l'électrode de batterie non aqueuse présentant les propriétés de résistance à l'électrolyte non aqueux. Cette batterie dotée des électrodes et de la couche d'électrolyte selon l'invention présente des caractéristiques de charge/décharge et de résistance à la chaleur excellentes.
PCT/JP1997/004667 1997-12-18 1997-12-18 Electrode de batterie non aqueuse et batterie utilisant cette electrode WO1999031746A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP1997/004667 WO1999031746A1 (fr) 1997-12-18 1997-12-18 Electrode de batterie non aqueuse et batterie utilisant cette electrode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1997/004667 WO1999031746A1 (fr) 1997-12-18 1997-12-18 Electrode de batterie non aqueuse et batterie utilisant cette electrode

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WO1999031746A1 true WO1999031746A1 (fr) 1999-06-24

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7206190B2 (en) 2002-11-29 2007-04-17 Honda Motor Co., Ltd. Electrode for electric double layer capacitor
JP2009238681A (ja) * 2008-03-28 2009-10-15 Nissan Motor Co Ltd リチウムイオン電池用電極
JP2013144442A (ja) * 2013-02-27 2013-07-25 Asahi Kasei Chemicals Corp 高耐熱性と高透過性を兼ね備えた多孔膜およびその製法
JP2019008924A (ja) * 2017-06-22 2019-01-17 トヨタ自動車株式会社 非水電解液二次電池

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02299152A (ja) * 1989-05-15 1990-12-11 Furukawa Battery Co Ltd:The 二次電池用電極の製造法
JPH04267054A (ja) * 1991-02-21 1992-09-22 Sanyo Electric Co Ltd 有機電解液電池用正極の製造方法
JPH05234594A (ja) * 1992-02-20 1993-09-10 Matsushita Electric Ind Co Ltd 固形電極組成物
JPH07263029A (ja) * 1994-03-25 1995-10-13 Mitsubishi Chem Corp リチウムイオン二次電池
JPH09293498A (ja) * 1996-04-26 1997-11-11 Sanyo Electric Co Ltd リチウムイオン電池用負極及びその製造方法
JPH09306503A (ja) * 1996-05-16 1997-11-28 Hitachi Maxell Ltd リチウム二次電池

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02299152A (ja) * 1989-05-15 1990-12-11 Furukawa Battery Co Ltd:The 二次電池用電極の製造法
JPH04267054A (ja) * 1991-02-21 1992-09-22 Sanyo Electric Co Ltd 有機電解液電池用正極の製造方法
JPH05234594A (ja) * 1992-02-20 1993-09-10 Matsushita Electric Ind Co Ltd 固形電極組成物
JPH07263029A (ja) * 1994-03-25 1995-10-13 Mitsubishi Chem Corp リチウムイオン二次電池
JPH09293498A (ja) * 1996-04-26 1997-11-11 Sanyo Electric Co Ltd リチウムイオン電池用負極及びその製造方法
JPH09306503A (ja) * 1996-05-16 1997-11-28 Hitachi Maxell Ltd リチウム二次電池

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7206190B2 (en) 2002-11-29 2007-04-17 Honda Motor Co., Ltd. Electrode for electric double layer capacitor
JP2009238681A (ja) * 2008-03-28 2009-10-15 Nissan Motor Co Ltd リチウムイオン電池用電極
JP2013144442A (ja) * 2013-02-27 2013-07-25 Asahi Kasei Chemicals Corp 高耐熱性と高透過性を兼ね備えた多孔膜およびその製法
JP2019008924A (ja) * 2017-06-22 2019-01-17 トヨタ自動車株式会社 非水電解液二次電池

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