WO2021193330A1 - 電解コンデンサおよびコンデンサ素子 - Google Patents

電解コンデンサおよびコンデンサ素子 Download PDF

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Publication number
WO2021193330A1
WO2021193330A1 PCT/JP2021/010999 JP2021010999W WO2021193330A1 WO 2021193330 A1 WO2021193330 A1 WO 2021193330A1 JP 2021010999 W JP2021010999 W JP 2021010999W WO 2021193330 A1 WO2021193330 A1 WO 2021193330A1
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Prior art keywords
layer
solid electrolyte
electrolyte layer
electrolytic capacitor
anode
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PCT/JP2021/010999
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English (en)
French (fr)
Japanese (ja)
Inventor
敬太 上中
兄 廣田
秀樹 島本
菜穂 松村
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Priority to CN202180020473.6A priority Critical patent/CN115280443B/zh
Priority to US17/904,841 priority patent/US12205773B2/en
Priority to JP2022510026A priority patent/JP7620821B2/ja
Publication of WO2021193330A1 publication Critical patent/WO2021193330A1/ja
Anticipated expiration legal-status Critical
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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
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/008—Terminals
    • H01G9/012—Terminals specially adapted for solid capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/022—Electrolytes; Absorbents
    • H01G9/025—Solid electrolytes
    • H01G9/028—Organic semiconducting electrolytes, e.g. TCNQ
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/15—Solid electrolytic capacitors

Definitions

  • the present disclosure relates to a capacitor element including a solid electrolyte layer containing a conductive polymer and an electrolytic capacitor containing the same.
  • an electrolytic capacitor equipped with a capacitor element having a solid electrolyte layer containing a conductive polymer is seen as promising.
  • the capacitor element covers, for example, an anode, a dielectric layer formed on at least a part of the surface of the anode, a solid electrolyte layer covering at least a part of the dielectric layer, and at least a part of the solid electrolyte layer. It is provided with a cathode extraction layer.
  • An electrolytic capacitor provided with a solid electrolyte layer is also referred to as a solid electrolytic capacitor.
  • Patent Document 1 proposes to use a conductive polymer complexed with an ionic polymer for a solid electrolytic capacitor.
  • the electrolytic capacitor according to one aspect of the present disclosure includes at least one capacitor element, and the capacitor element includes an anode, a dielectric layer formed on the surface of the anode, and at least a part of the dielectric layer.
  • a solid electrolyte layer that covers the solid electrolyte layer and a first layer that comes into contact with the solid electrolyte layer and covers at least a part of the solid electrolyte layer are provided, and the first layer constitutes at least a part of the cathode extraction layer.
  • the electrode potential P s of the solid electrolyte layer is higher than the electrode potential P 1 of the first layer.
  • the other aspect of the present disclosure relates to an anode, a dielectric layer formed on the surface of the anode, a solid electrolyte layer covering at least a part of the dielectric layer, and at least one of the solid electrolyte layers.
  • a first layer covering the portion is provided, the first layer constitutes at least a part of the cathode extraction layer, and the electrode potential P s of the solid electrolyte layer is higher than the electrode potential P 1 of the first layer. ..
  • FIG. 1 is a schematic cross-sectional view of an electrolytic capacitor according to an embodiment of the present disclosure.
  • the conductive polymer contained in the solid electrolyte layer is gradually oxidatively deteriorated, and the ESR increases.
  • the resistance of the solid electrolyte layer increases and the capacitance decreases.
  • the reliability of the electrolytic capacitor decreases.
  • the electrolytic capacitor is exposed to a high temperature environment for a long period of time, the oxidative deterioration of the conductive polymer becomes remarkable, and the ESR or the capacitance tends to decrease.
  • the electrode potential of a metal is high, it is less likely to be oxidized than when it is low.
  • a member containing a first metal and a member containing a second metal having a lower electrode potential than the first metal are in contact with each other and a component responsible for electron transfer such as water molecules intervenes, only the second metal is oxidized. , A local battery is formed.
  • the oxidative deterioration of the conductive polymer may progress due to the intrusion of water into the electrolytic capacitor.
  • One of the causes of this oxidative deterioration is that the electrode potential of the solid electrolyte layer is lower than the electrode potential of the layer in contact with the solid electrolyte layer of the cathode extraction layer, so that the oxidation of the conductive polymer proceeds preferentially. It became clear that it was in. Oxidative deterioration of the conductive polymer is particularly remarkable in a high temperature environment.
  • an electrolytic capacitor or a capacitor element of the present disclosure the electrode potential P s of the solid electrolyte layer, covering at least a portion of the solid electrolyte layer, and forming at least a part of the cathode lead layer higher than the electrode potential P 1 of the first layer.
  • the electrode potential P s of the solid electrolyte layer higher than the electrode potential P 1 of the first layer, the oxidation of the conductive polymer contained in the solid electrolyte layer is suppressed, and the deterioration of the solid electrolyte layer is suppressed. .. As a result, the increase in ESR is suppressed. Further, by suppressing the increase in resistance due to the deterioration of the solid electrolyte layer, the decrease in capacitance is also suppressed. Therefore, the reliability of the electrolytic capacitor can be improved.
  • Electrode potential P s of the solid electrolyte layer for example, the kind of conductive polymer, dopant type, the ratio of the dopant, the potential to be applied in forming the conductive polymer by polymerization (hereinafter, referred to as polymerization potential) and It can be adjusted by selecting or adjusting the current.
  • polymerization potential the potential to be applied in forming the conductive polymer by polymerization
  • a dielectric layer is formed at least along the inner wall surface of holes and pits on the surface of the anode having a porous surface layer, and is solid so as to cover the dielectric layer.
  • the electrolyte layer is also formed along the inner walls of the holes and pits. Therefore, the electrode potential P s of the solid electrolyte layer in the electrolytic capacitor does not correlate indiscriminately the polymerization potentials.
  • the electrode potentials P s and P 1 are values measured using a silver / silver chloride electrode (Ag / Ag + ) as a reference electrode.
  • Electrolytic capacitors include one or more capacitor elements. At least one of the capacitor elements included in the electrolytic capacitor may have P s > P 1 . That if there are two or more capacitor elements in the electrolytic capacitor is preferably P s> P 1 at 50% or more of the capacitor element, a P s> P 1 at 75% or more of the capacitor element More preferably, P s > P 1 for all capacitor elements.
  • the anode body can include a valve acting metal, an alloy containing a valve acting metal, a compound containing a valve acting metal, and the like. These materials can be used alone or in combination of two or more.
  • the valve acting metal for example, aluminum, tantalum, niobium, and titanium are preferably used.
  • An anode having a porous surface can be obtained, for example, by roughening the surface of a base material (such as a foil-like or plate-like base material) containing a valve acting metal. The roughening can be performed by, for example, an etching process.
  • the anode body may be a molded body of particles containing a valve acting metal or a sintered body thereof. The sintered body has a porous structure.
  • the dielectric layer is an insulating layer that functions as a dielectric formed so as to cover the surface of at least a part of the anode.
  • the dielectric layer is formed by anodizing the valve acting metal on the surface of the anode body by chemical conversion treatment or the like.
  • the dielectric layer may be formed so as to cover at least a part of the anode body.
  • the dielectric layer is usually formed on the surface of the anode. Since the dielectric layer is formed on the porous surface of the anode body, it is formed along the holes on the surface of the anode body and the inner wall surface of the pit.
  • the dielectric layer contains an oxide of the valvening metal.
  • the dielectric layer when tantalum is used as the valve acting metal contains Ta 2 O 5
  • the dielectric layer when aluminum is used as the valve acting metal contains Al 2 O 3 .
  • the dielectric layer is not limited to this, and may be any one that functions as a dielectric.
  • the solid electrolyte layer is formed on the surface of the anode body so as to cover the dielectric layer via the dielectric layer.
  • the solid electrolyte layer does not necessarily have to cover the entire dielectric layer (the entire surface), and may be formed so as to cover at least a part of the dielectric layer.
  • the solid electrolyte layer constitutes at least a part of the cathode body in the electrolytic capacitor.
  • the cathode body usually includes a solid electrolyte layer and a cathode extraction layer.
  • the electrode potential P s of the solid electrolyte layer is made higher than the electrode potential P 1 of the first layer contained in the cathode extraction layer.
  • the difference between P s and P 1 is, for example, 0.02 V or more, preferably 0.05 V or more, and more preferably 0.1 V or more. When the difference between P s and P 1 is in such a range, oxidative deterioration of the solid electrolyte layer can be further suppressed.
  • Electrode potential P s of the solid electrolyte layer for example, greater than 0.2V, it may be more than 0.22V, or may be more than 0.25 V. Although it depends on the electrode potential P 1 of the first layer, by setting P s in such a range, it becomes easier to further suppress the oxidative deterioration of the solid electrolyte layer.
  • the upper limit of P s is not particularly limited, for example, it may be 0.5V or less.
  • Electrode potential P s of the solid electrolyte layer, with the solid electrolyte layer was immersed samples exposed state in 1.5 wt% p-toluenesulfonic acid aqueous solution, as a reference electrode of silver (Ag / Ag +) Can be measured using.
  • the sample can be prepared by cutting the capacitor element with a microtome or the like until the solid electrolyte layer is exposed.
  • the electrode potential P 1 of the first layer can also be measured using a sample in a state where the first layer is exposed, as in the case of the electrode potential P s of the solid electrolyte layer.
  • the sample can be prepared by cutting the capacitor element with a microtome or the like until the first layer is exposed, if necessary.
  • the solid electrolyte layer contains a conductive polymer.
  • the solid electrolyte layer may further contain at least one of the dopant and the additive, if desired.
  • the conductive polymer a known one used for an electrolytic capacitor, for example, a ⁇ -conjugated conductive polymer or the like can be used.
  • the conductive polymer include polymers having polypyrrole, polythiophene, polyaniline, polyfuran, polyacetylene, polyphenylene, polyphenylene vinylene, polyacene, and polythiophene vinylene as a basic skeleton. Of these, polymers having polypyrrole, polythiophene, or polyaniline as the basic skeleton are preferable.
  • the above polymers also include homopolymers, copolymers of two or more monomers, and derivatives thereof (such as substituents having substituents).
  • polythiophene includes poly (3,4-ethylenedioxythiophene) and the like.
  • the conductive polymer may be used alone or in combination of two or more.
  • the weight average molecular weight (Mw) of the conductive polymer is not particularly limited, but is, for example, 1,000 or more and 1,000,000 or less.
  • the weight average molecular weight (Mw) is a polystyrene-equivalent value measured by gel permeation chromatography (GPC). GPC is usually measured using a polystyrene gel column and water / methanol (volume ratio 8/2) as a mobile phase.
  • the solid electrolyte layer can further contain a dopant.
  • a dopant for example, at least one selected from the group consisting of anions and polyanions is used.
  • anion examples include sulfate ion, nitrate ion, phosphate ion, borate ion, organic sulfonic acid ion, carboxylic acid ion, etc., but are not particularly limited.
  • examples of the dopant that produces a sulfonic acid ion include p-toluenesulfonic acid and naphthalenesulfonic acid.
  • Examples of the polyanion include a polymer type polysulfonic acid and a polymer type polycarboxylic acid.
  • Examples of the polymer type polysulfonic acid include polyvinyl sulfonic acid, polystyrene sulfonic acid, polyallyl sulfonic acid, polyacrylic sulfonic acid, and polymethacryl sulfonic acid.
  • Examples of the polymer type polycarboxylic acid include polyacrylic acid and polymethacrylic acid.
  • Polyanions also include polyester sulfonic acid, phenol sulfonic acid novolac resin and the like. However, polyanions are not limited to these.
  • the anion and the polyanion may be contained in the solid electrolyte layer in the form of salts, respectively.
  • each of the anion and the polyanion may form a conductive polymer composite together with the conductive polymer.
  • the amount of the dopant contained in the solid electrolyte layer is, for example, 10 to 1000 parts by mass, 20 to 500 parts by mass, or 50 to 200 parts by mass with respect to 100 parts by mass of the conductive polymer.
  • the solid electrolyte layer may be a single layer or may be composed of a plurality of layers.
  • the conductive polymer contained in each layer may be the same or different.
  • the dopant contained in each layer may be the same or different.
  • the solid electrolyte layer may further contain known additives and known conductive materials other than the conductive polymer.
  • a conductive material include at least one selected from the group consisting of a conductive inorganic material such as manganese dioxide and a TCNQ complex salt.
  • a layer or the like that enhances adhesion may be interposed between the dielectric layer and the solid electrolyte layer.
  • the solid electrolyte layer is formed by, for example, polymerizing the precursor on the dielectric layer using a treatment liquid containing the precursor of the conductive polymer.
  • the polymerization can be carried out by at least one of chemical polymerization and electrolytic polymerization.
  • the precursor of the conductive polymer include monomers, oligomers and prepolymers.
  • the solid electrolyte layer may be formed by adhering a treatment liquid (for example, a dispersion liquid or a solution) containing a conductive polymer to the dielectric layer and then drying the layer.
  • a treatment liquid for example, a dispersion liquid or a solution
  • the dispersion medium include water, an organic solvent, or a mixture thereof.
  • the treatment liquid may further contain other components such as dopants.
  • an oxidizing agent is used to polymerize the precursor.
  • the oxidizing agent may be contained in the treatment liquid as an additive. Further, the oxidizing agent may be applied to the anode body before or after the treatment liquid is brought into contact with the anode body on which the dielectric layer is formed. Examples of such an oxidizing agent include sulfates, sulfonic acids, and salts thereof.
  • the oxidizing agent may be used alone or in combination of two or more.
  • the sulfate include a salt of sulfuric acid such as ferric sulfate and sodium persulfate, and a salt of sulfuric acid such as persulfuric acid and a metal.
  • the metal constituting the salt examples include alkali metals (sodium, potassium, etc.), iron, copper, chromium, zinc, and the like.
  • the sulfonic acid or a salt thereof has a function as a dopant in addition to a function as an oxidizing agent.
  • the sulfonic acid or a salt thereof the low molecular weight sulfonic acid exemplified for the dopant or a salt thereof or the like is used.
  • the step of forming the solid electrolyte layer by immersion in the treatment liquid and polymerization (or drying) may be performed once, or may be repeated a plurality of times. Conditions such as the composition and viscosity of the treatment liquid may be the same each time, or at least one condition may be changed.
  • Electrode potential P s of the solid electrolyte layer in the case of forming the solid electrolyte layer with a treatment liquid containing a chemical polymerization or conductive polymer, or to select the type of the type and the dopant of the conductive polymer, a dopant It can be adjusted by adjusting the amount or concentration of.
  • the electrode potential P is selected by selecting the type of conductive polymer and the type of dopant, adjusting the amount or concentration of dopant, and adjusting the polymerization potential. s can be adjusted.
  • the cathode extraction layer may include at least a first layer that comes into contact with the solid electrolyte layer and covers at least a part of the solid electrolyte layer, and includes a first layer and a second layer that covers the first layer. May be good.
  • the first layer include a layer containing conductive particles, a metal foil, and the like.
  • the conductive particles include at least one selected from conductive carbon and metal powder.
  • the cathode extraction layer may be composed of a layer containing conductive carbon as the first layer and a layer containing metal powder or a metal foil as the second layer. When a metal foil is used as the first layer, the cathode extraction layer may be formed of this metal foil.
  • the first layer containing conductive carbon for example, an anode having a dielectric layer in which a solid electrolyte layer is formed is immersed in a dispersion liquid containing conductive carbon, or a paste containing conductive carbon is used as a solid electrolyte. It can be formed by applying it to the surface of the layer.
  • a dispersion liquid containing conductive carbon for example, graphites such as artificial graphite and natural graphite and carbon black are used.
  • the dispersion liquid and the paste for example, those in which conductive carbon is dispersed in an aqueous liquid medium are used.
  • the layer containing the metal powder as the second layer can be formed, for example, by laminating a composition containing the metal powder on the surface of the first layer.
  • a metal paste layer formed by using a composition containing a metal powder such as silver particles and a resin (binder resin) can be used.
  • a resin a thermoplastic resin can be used, but it is preferable to use a thermosetting resin such as an imide resin or an epoxy resin.
  • the type of metal is not particularly limited, but it is preferable to use a valve action metal such as aluminum, tantalum, niobium, or an alloy containing a valve action metal. If necessary, the surface of the metal foil may be roughened by etching or the like. A chemical conversion film may be provided on the surface of the metal foil, or a metal (dissimilar metal) or non-metal film different from the metal constituting the metal foil may be provided. Examples of dissimilar metals and non-metals include metals such as titanium and non-metals such as carbon (conductive carbon and the like).
  • the above-mentioned dissimilar metal or non-metal (for example, conductive carbon) coating may be used as the first layer, and the above-mentioned metal foil may be used as the second layer.
  • Electrode potential P 1 of the first layer can be adjusted by selecting such materials and configurations of the first layer.
  • the thickness of the first layer may be, for example, 0.1 ⁇ m or more and 100 ⁇ m or less, 0.5 ⁇ m or more and 50 ⁇ m or less, or 1 ⁇ m or more and 20 ⁇ m or less.
  • the thickness of the second layer may be, for example, 0.1 ⁇ m or more and 100 ⁇ m or less, 0.5 ⁇ m or more and 50 ⁇ m or less, or 1 ⁇ m or more and 20 ⁇ m or less.
  • a separator When the metal foil is used for the cathode extraction layer, a separator may be arranged between the metal foil and the anode body.
  • the separator is not particularly limited, and for example, a non-woven fabric containing fibers of cellulose, polyethylene terephthalate, vinylon, polyamide (for example, aromatic polyamide such as aliphatic polyamide and aramid) may be used.
  • the electrolytic capacitor may be a wound type, a chip type, or a laminated type.
  • an electrolytic capacitor may include a laminate of two or more capacitor elements. The configuration of the capacitor element may be selected according to the type of electrolytic capacitor.
  • one end of the cathode terminal is electrically connected to the cathode extraction layer.
  • the cathode terminal is, for example, coated with a conductive adhesive on the cathode layer and bonded to the cathode layer via the conductive adhesive.
  • One end of the anode terminal is electrically connected to the anode body.
  • the other end of the anode terminal and the other end of the cathode terminal are each drawn out from the resin outer body.
  • the other end of each terminal exposed from the resin exterior is used for solder connection with a substrate (not shown) on which an electrolytic capacitor should be mounted.
  • the capacitor element is sealed using a resin exterior or case.
  • the material resin of the capacitor element and the outer body for example, uncured thermosetting resin and filler
  • the capacitor element is sealed with the resin outer body by a transfer molding method, a compression molding method, or the like. You may.
  • the anode terminal connected to the anode lead drawn from the capacitor element and the other end side portion of the cathode terminal are each exposed from the mold.
  • the capacitor element is housed in the bottomed case so that the other end side of the anode terminal and the cathode terminal is located on the opening side of the bottomed case, and the opening of the bottomed case is sealed with a sealant. May form an electrolytic capacitor.
  • FIG. 1 is a cross-sectional view schematically showing the structure of an electrolytic capacitor according to an embodiment of the present invention.
  • the electrolytic capacitor 1 includes a capacitor element 2, a resin outer body 3 that seals the capacitor element 2, an anode terminal 4 and a cathode whose at least a part thereof is exposed to the outside of the resin outer body 3, respectively. It is provided with a terminal 5.
  • the anode terminal 4 and the cathode terminal 5 can be made of a metal such as copper or a copper alloy.
  • the resin exterior body 3 has a substantially rectangular parallelepiped outer shape, and the electrolytic capacitor 1 also has a substantially rectangular parallelepiped outer shape.
  • the capacitor element 2 includes an anode body 6, a dielectric layer 7 covering the anode body 6, and a cathode body 8 covering the dielectric layer 7.
  • the cathode body 8 includes a solid electrolyte layer 9 that covers the dielectric layer 7 and a cathode extraction layer 10 that covers the solid electrolyte layer 9.
  • the cathode extraction layer 10 has a carbon layer 11 as a first layer and a metal paste layer 12 as a second layer.
  • the electrode potential P s of the solid electrolyte layer 9 is higher than the electrode potential P 1 of the carbon layer 11 in contact with the solid electrolyte layer 9.
  • the oxidative deterioration of the conductive polymer contained in the solid electrolyte layer 9 is suppressed, so that the increase in ESR is suppressed.
  • the decrease in capacitance is suppressed. Therefore, the reliability of the electrolytic capacitor can be improved.
  • the anode body 6 includes a region facing the cathode body 8 and a region not facing the cathode body 8.
  • an insulating separation layer 13 is formed so as to cover the surface of the anode body 6 in a band shape in a portion adjacent to the cathode body 8, and the cathode body 8 and the anode body 8 and the anode body 8 are formed. Contact with body 6 is restricted.
  • the other part of the region of the anode body 6 that does not face the cathode body 8 is electrically connected to the anode terminal 4 by welding.
  • the cathode terminal 5 is electrically connected to the cathode body 8 via an adhesive layer 14 formed of a conductive adhesive.
  • Electrolytic Capacitor A1 The electrolytic capacitor 1 (electrolytic capacitor A1) shown in FIG. 1 was produced and its characteristics were evaluated in the following manner.
  • the anode body 6 was prepared by roughening both surfaces of an aluminum foil (thickness: 100 ⁇ m) as a base material by etching.
  • the anode body 6 on which the dielectric layer 7 was formed in the above (2) and the counter electrode are immersed in the obtained aqueous solution, and electrolytic polymerization is performed at 25 ° C. at a polymerization voltage of 3 V (polymerization potential with respect to the silver reference electrode). By doing so, the solid electrolyte layer 9 was formed.
  • a silver paste containing silver particles and a binder resin (epoxy resin) is applied to the surface of the carbon layer 11 and heated at 150 to 200 ° C. for 10 to 60 minutes to cure the binder resin, and the metal paste layer 12 was formed.
  • the cathode body 8 composed of the carbon layer 11 and the metal paste layer 12 was formed.
  • the capacitor element 2 was manufactured as described above.
  • a resin exterior body 3 made of an insulating resin was formed around the capacitor element 2 by molding. At this time, the other end of the anode terminal 4 and the other end of the cathode terminal 5 are in a state of being pulled out from the resin exterior body 3.
  • Electrode potentials P s and P 1 Using a capacitor element 2, in above-described procedure was measured electrode potential P 1 of the electrode potential P s and the carbon layer 11 as a first layer of the solid electrolyte layer 9.
  • an accelerated test was conducted by applying a rated voltage to the electrolytic capacitor for 500 hours in an environment of 145 ° C. and 0.4% RH. Then, the capacitance and ESR were measured in a 20 ° C. environment in the same procedure as for the initial capacitance and ESR, and the average value of 20 electrolytic capacitors was calculated.
  • the ratio (%) of the capacitance after the acceleration test when the average value of the initial capacitance was 100% was calculated as the capacitance change rate ( ⁇ Cap).
  • the ratio (%) of the average value of ESR after the accelerated test when the average value of the initial ESR was set to 100% was calculated as the ESR change rate ( ⁇ ESR).
  • Electrolytic capacitors A2 to A3 and B1 to B3 >> In Example 1 (3), electrolytic polymerization was carried out by changing the concentration of p-toluenesulfonic acid in the aqueous solution and changing the polymerization voltage. Except for these, a capacitor element and an electrolytic capacitor were produced and evaluated in the same manner as in Example 1.
  • Table 1 The evaluation results are shown in Table 1.
  • A1 to A3 are examples, and B1 to B3 are comparative examples.
  • an electrolytic capacitor having excellent reliability is provided in which an increase in ESR or a decrease in capacitance is suppressed.
  • Such electrolytic capacitors can be used in various applications where high reliability is required.
  • Electrolytic capacitor 2 Condenser element 3: Resin exterior body 4: Anode terminal, 4S: Main surface of anode terminal 5: Cathode terminal, 5S: Main surface of cathode terminal, 6: Anode body, 7: Dielectric Body layer, 8: cathode body, 9: solid electrolyte layer, 10: cathode extraction layer, 11: carbon layer, 12: metal paste layer, 13: separation layer, 14: adhesive layer

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)
PCT/JP2021/010999 2020-03-25 2021-03-18 電解コンデンサおよびコンデンサ素子 Ceased WO2021193330A1 (ja)

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CN202180020473.6A CN115280443B (zh) 2020-03-25 2021-03-18 电解电容器及电容器元件
US17/904,841 US12205773B2 (en) 2020-03-25 2021-03-18 Electrolytic capacitor and capacitor element
JP2022510026A JP7620821B2 (ja) 2020-03-25 2021-03-18 電解コンデンサおよびコンデンサ素子

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