JP2007013010A - Capacitor and electrode separator therefor - Google Patents
Capacitor and electrode separator therefor Download PDFInfo
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- JP2007013010A JP2007013010A JP2005194312A JP2005194312A JP2007013010A JP 2007013010 A JP2007013010 A JP 2007013010A JP 2005194312 A JP2005194312 A JP 2005194312A JP 2005194312 A JP2005194312 A JP 2005194312A JP 2007013010 A JP2007013010 A JP 2007013010A
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- 239000003990 capacitor Substances 0.000 title claims abstract description 77
- 239000000835 fiber Substances 0.000 claims abstract description 163
- 229920001470 polyketone Polymers 0.000 claims abstract description 56
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 29
- 239000000470 constituent Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 239000000126 substance Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 description 12
- 229920002994 synthetic fiber Polymers 0.000 description 10
- 239000012209 synthetic fiber Substances 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 7
- 239000004760 aramid Substances 0.000 description 7
- 239000008151 electrolyte solution Substances 0.000 description 7
- 229920003043 Cellulose fiber Polymers 0.000 description 6
- 229920003235 aromatic polyamide Polymers 0.000 description 6
- 238000010292 electrical insulation Methods 0.000 description 6
- -1 isocyanate salt Chemical class 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 229920000728 polyester Polymers 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010009 beating Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 229920000106 Liquid crystal polymer Polymers 0.000 description 2
- 229920000297 Rayon Polymers 0.000 description 2
- 239000002518 antifoaming agent Substances 0.000 description 2
- 229920006231 aramid fiber Polymers 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 239000012784 inorganic fiber Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- WRDNCFQZLUCIRH-UHFFFAOYSA-N 4-(7-azabicyclo[2.2.1]hepta-1,3,5-triene-7-carbonyl)benzamide Chemical compound C1=CC(C(=O)N)=CC=C1C(=O)N1C2=CC=C1C=C2 WRDNCFQZLUCIRH-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Natural products C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- MHSKRLJMQQNJNC-UHFFFAOYSA-N terephthalamide Chemical compound NC(=O)C1=CC=C(C(N)=O)C=C1 MHSKRLJMQQNJNC-UHFFFAOYSA-N 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- SEACXNRNJAXIBM-UHFFFAOYSA-N triethyl(methyl)azanium Chemical compound CC[N+](C)(CC)CC SEACXNRNJAXIBM-UHFFFAOYSA-N 0.000 description 1
- 238000009849 vacuum degassing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
Classifications
-
- 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
- Y02E60/13—Energy storage using capacitors
Abstract
Description
本発明は、構成繊維の１〜９９質量％が下記式（１）で示される繰り返し単位を含む脂肪族ポリケトン繊維であるポリケトン含有繊維紙からなるコンデンサー用電極セパレーター、当該電極セパレーターを用いたアルミ電解コンデンサーまたは電気二重層キャパシタなどのコンデンサー関する。更に詳しくは、強度、寸法安定性、耐熱性、電気絶縁性、耐溶剤性、耐薬品性に優れ、かつ低吸水性である厚さの薄い多孔性の均一なポリケトン繊維紙を電極セパレーターとして用いたコンデンサー、およびコンデンサー用電極セパレーターに関する。 The present invention relates to an electrode separator for a capacitor comprising a polyketone-containing fiber paper in which 1 to 99% by mass of the constituent fibers are aliphatic polyketone fibers containing a repeating unit represented by the following formula (1), and aluminum electrolysis using the electrode separator Concerning a capacitor such as a capacitor or an electric double layer capacitor. More specifically, thin porous uniform polyketone fiber paper with excellent strength, dimensional stability, heat resistance, electrical insulation, solvent resistance, chemical resistance and low water absorption is used as an electrode separator. And the electrode separator for the capacitor.
近年、木材パルプの代わりに合成繊維を用いて抄紙した合成繊維紙が検討されている。合成繊維紙は耐水性がよく、合成繊維の様々な特徴を併せ持つので、新規材料として注目され、種々提案されている。
例えば、特許文献１ではポリエステル繊維を用いた合成繊維紙が開示され、耐水性、耐薬品性に優れるので、感熱孔版原版用支持体などに使用されている。しかし、ポリエステル繊維は熱可塑性樹脂であり、高温にすると熱膨張して寸法安定性、強度が低下するので、耐熱性の向上が必要である。
また、特許文献２では芳香族ポリアミド繊維を用いた繊維紙が開示され、力学的強度、寸法安定性、耐熱性などに優れるので、多層プリント配線基板用基材などに使用されている。しかし、芳香族ポリアミド繊維は吸水性が高く、高温処理すると吸水された水が脱着してプリント配線基板の膨れなどを生ずるので、改良する余地がある。また、芳香族ポリアミド繊維は他の樹脂との接着性の点でも性能向上が望まれている。
In recent years, synthetic fiber papers made using synthetic fibers instead of wood pulp have been studied. Synthetic fiber paper has good water resistance and has various characteristics of synthetic fibers, and has attracted attention as a new material and has been proposed in various ways.
For example, Patent Document 1 discloses a synthetic fiber paper using polyester fibers, which is excellent in water resistance and chemical resistance, and is therefore used as a support for a heat-sensitive stencil plate. However, polyester fiber is a thermoplastic resin, and when it is heated to high temperature, it expands thermally and its dimensional stability and strength are lowered. Therefore, it is necessary to improve heat resistance.
Further, Patent Document 2 discloses a fiber paper using an aromatic polyamide fiber, which is excellent in mechanical strength, dimensional stability, heat resistance, etc., and is therefore used as a base material for multilayer printed wiring boards. However, the aromatic polyamide fiber has high water absorption, and when it is treated at a high temperature, the absorbed water is desorbed and the printed wiring board is swollen, so there is room for improvement. In addition, aromatic polyamide fibers are desired to have improved performance in terms of adhesiveness with other resins.
脂肪族ポリケトン繊維を用いたシート状物は特許文献３で開示され、低吸水で剛性に富んだ、耐薬品性、力学的強度、寸法安定性、耐熱性、接着性などに優れた１００μm〜１０ｍｍのシート状構造体材料を提供するとしているが、まだ市場に出ていない。
これらの合成繊維紙は電気絶縁性にも優れているので、電気材料、とくにコンデンサー用電極セパレーター等に使用する検討がされている。
電子機器の小型化、高集積化の進行に伴い、コンデンサーの高エネルギー密度化が要求されてきている。
コンデンサー用電極セパレーターにおいては薄膜化する際に、電極材料の突き刺しによる短絡や、加工時の強度不足による短絡が生じたり、充放電時のイオンや電位によるセパレーターの劣化対策が必要となる。これらはセパレーターの突き刺し強度や抗張力が高いものが望まれる。また電解液に耐えうる耐薬品性や組み立て加工時脱水処理に必要な耐熱性が重要となる。
A sheet-like material using an aliphatic polyketone fiber is disclosed in Patent Document 3, and is 100 μm to 10 mm, which has excellent water resistance, high rigidity, chemical resistance, mechanical strength, dimensional stability, heat resistance, adhesiveness and the like. Although it is said that it will provide a sheet-like structure material, it has not been put on the market yet.
Since these synthetic fiber papers are also excellent in electrical insulation, they are being studied for use in electrical materials, particularly capacitor electrode separators and the like.
With the progress of downsizing and higher integration of electronic devices, higher energy density of capacitors has been demanded.
When a capacitor electrode separator is thinned, a short circuit due to piercing of an electrode material, a short circuit due to insufficient strength during processing, or measures against deterioration of the separator due to ions or potentials during charge / discharge are required. These are desired to have high piercing strength and tensile strength of the separator. In addition, chemical resistance that can withstand the electrolytic solution and heat resistance necessary for dehydration during assembly are important.
特許文献４，５、および６など、セルロース繊維を用いたコンデンサー用電極セパレーターの特許が提案され、また、市場で市販されている。しかし、セルロース繊維は吸水性が高く、有機系コンデンサーへ使用する時には高温で絶乾しなければならない。また、セルロース繊維は繊維同士を水素結合で接着しているので、コンデンサー組立時の加工強度を維持するためには厚さに限界がある。
合成繊維を用いた繊維紙からなるコンデンサー用電極セパレーターとしては、特許文献７で全芳香族ポリアミド、全芳香族ポリエステルなどの液晶性高分子繊維をフィブリル化して湿式繊維紙とし、耐熱性、耐薬品性、電気絶縁性が優れていることから、電気二重層キャパシタ用セパレーターに使用することを提案している。
しかし、液晶性高分子繊維も吸水性が高く、有機系コンデンサーに組み込む際は加熱脱水して用いなければならない。
Patents of capacitor electrode separators using cellulose fibers, such as Patent Documents 4, 5, and 6, have been proposed and are commercially available on the market. However, cellulose fibers are highly water-absorbing and must be completely dried at high temperatures when used in organic capacitors. In addition, since the cellulose fibers are bonded to each other by hydrogen bonding, there is a limit to the thickness in order to maintain the processing strength at the time of assembling the capacitor.
As an electrode separator for a capacitor made of fiber paper using synthetic fibers, in Patent Document 7, liquid crystalline polymer fibers such as wholly aromatic polyamide and wholly aromatic polyester are fibrillated to form wet fiber paper, which has heat resistance and chemical resistance. It has been proposed to be used as a separator for electric double layer capacitors because of its excellent properties and electrical insulation.
However, liquid crystalline polymer fibers also have high water absorption and must be heated and dehydrated when incorporated into organic capacitors.
本発明は従来技術に見られる上記問題点を解決するものである。すなわち、本発明は、脂肪族ポリケトン繊維を含む繊維紙を電極セパレーターとして用いた高エネルギー密度で、内部抵抗の小さい生産性の良いコンデンサー、および、耐薬品性、耐熱性、寸法安定性、電気絶縁性に優れ、かつ、低吸水性である厚さが薄い多孔性のコンデンサー用電極セパレーターを提供することを目的とする。 The present invention solves the above problems found in the prior art. That is, the present invention is a high energy density, low internal resistance, high productivity capacitor using fiber paper containing aliphatic polyketone fibers as an electrode separator, and chemical resistance, heat resistance, dimensional stability, electrical insulation. An object of the present invention is to provide a porous electrode separator for a capacitor that is excellent in properties and has a low water absorption and a small thickness.
本発明者らは上記課題を解決するため、脂肪族ポリケトン繊維に着目して鋭意検討した結果、脂肪族ポリケトン繊維を含む繊維紙を電極セパレーターに用いた高エネルギー密度で内部抵抗の小さい生産性の良いコンデンサー、および、耐薬品性、耐熱性、寸法安定性、電気絶縁性に優れ、かつ低吸水性である厚さが薄い多孔性のコンデンサー用電極セパレーターを実現できることを見出し本発明に至ったものである。 In order to solve the above-mentioned problems, the present inventors have intensively studied paying attention to the aliphatic polyketone fiber, and as a result, the fiber paper containing the aliphatic polyketone fiber is used as an electrode separator with high energy density and low internal resistance. The inventors have found that a good capacitor and a thin electrode separator for a capacitor having excellent chemical resistance, heat resistance, dimensional stability, electrical insulation and low water absorption can be realized. It is.
すなわち本発明の第１は、構成繊維の１〜９９質量％が下記式（１）で示される繰り返し単位を含む脂肪族ポリケトン繊維であるポリケトン含有繊維紙を含むコンデンサー用電極セパレーターである。
−ＣＨ２−ＣＨ２−ＣＯ− （１）
発明の第２は繊維紙の厚さが５〜２００μｍであることを特徴とする発明の第１のコンデンサー用電極セパレーターである。
発明の第３は下記で表される繊維紙の空隙率が３０〜９０％であることを特徴とする発明の第１または２のコンデンサー用電極セパレーターである。
空隙率＝｛１-（繊維紙を構成する繊維の総質量／構成する繊維の密度）／（繊維紙の厚さ×面積）｝×１００
That is, the 1st of this invention is an electrode separator for capacitors containing the polyketone containing fiber paper which is an aliphatic polyketone fiber in which 1-99 mass% of a constituent fiber contains the repeating unit shown by a following formula (1).
—CH 2 —CH 2 —CO— (1)
A second aspect of the invention is the first electrode separator for capacitors according to the invention, wherein the thickness of the fiber paper is 5 to 200 μm.
A third aspect of the present invention is the electrode separator for capacitors according to the first or second aspect of the present invention, wherein the porosity of the fiber paper represented below is 30 to 90%.
Porosity = {1− (total mass of fibers constituting fiber paper / density of fibers constituting fiber) / (thickness of fiber paper × area)} × 100
発明の第４は脂肪族ポリケトン繊維の繊維長が０．５〜１０ｍｍにカットされた繊維であることを特徴とする発明の第１から３のいずれかのコンデンサー用電極セパレーターである。
発明の第５は脂肪族ポリケトン繊維の平均繊維径が０．１〜２０μｍであることを特徴とする発明の１から４のいずれかのコンデンサー用電極セパレーターである。
発明の第６は繊維紙を重ねて用いることを特徴とする発明の第１から５のいずれかのコンデンサー用電極セパレーターである。
発明の第７は発明の第１から６のいずれかの電極セパレーターを用いたコンデンサーである。
A fourth aspect of the invention is the electrode separator for a capacitor according to any one of the first to third aspects of the invention, wherein the fiber length of the aliphatic polyketone fiber is cut to 0.5 to 10 mm.
A fifth aspect of the present invention is the electrode separator for a capacitor according to any one of the first to fourth aspects, wherein the average fiber diameter of the aliphatic polyketone fiber is 0.1 to 20 μm.
A sixth aspect of the present invention is the electrode separator for a capacitor according to any one of the first to fifth aspects of the present invention, wherein fiber paper is used in an overlapping manner.
A seventh aspect of the invention is a capacitor using the electrode separator according to any one of the first to sixth aspects of the invention.
本発明の脂肪族ポリケトン繊維を含む繊維紙を電極セパレーターとして用いた高エネルギー密度で内部抵抗が小さく生産性の良いコンデンサー、および、高強度、高弾性率、耐熱性、耐薬品性、耐溶剤性、寸法安定性、電気絶縁性に優れ、かつ低吸水性である非常に薄い多孔性の、脂肪族ポリケトン繊維を含むコンデンサー用電極セパレーターを提供するもので、従来に無い特徴を持ったものである。 Capacitor with high energy density, low internal resistance, good productivity, and high strength, high elastic modulus, heat resistance, chemical resistance, solvent resistance using fiber paper containing aliphatic polyketone fiber of the present invention as an electrode separator It provides a very thin porous electrode separator for capacitors containing aliphatic polyketone fibers that has excellent dimensional stability, electrical insulation, and low water absorption, and has unprecedented characteristics. .
以下、本発明について具体的に説明する。
本発明のコンデンサーは脂肪族ポリケトン繊維を含む繊維紙を電極セパレーターとして用いたものであり、該セパレーターの薄くて高強度であることから、該コンデンサーの高エネルギー密度化、および低内部抵抗化を実現し、併せて、高耐熱性、低吸水性により、加熱脱水が容易で高生産性を実現する特徴を持つ。
Hereinafter, the present invention will be specifically described.
The capacitor of the present invention uses a fiber paper containing an aliphatic polyketone fiber as an electrode separator. Since the separator is thin and high in strength, the capacitor has high energy density and low internal resistance. In addition, high heat resistance and low water absorption make it easy to heat dehydrate and realize high productivity.
本発明のコンデンサーは、白金箔、金箔、アルミ箔、活性炭粉末を集電体のアルミ箔上に塗布した炭素電極などを電極とし、同一種類の２つの電極間に脂肪族ポリケトン繊維紙のセパレーターを挟んで電極同士の接触を回避し、該セパレーターに電解液を含浸させて作製することができる。工業的には電極を捲回して、あるいは積層してコンパクト化し、コンデンサーのエネルギー密度（容量）を向上させているが、該セパレーターは強靭性を保ちながら薄いため、電気的内部抵抗が低く、かつエネルギー密度をより高めることができる。本発明のコンデンサーは電極の種類、および製法に限定されない。また、電解液として水系と有機系の２種類が工業的に使用されているが、電解液の種類にも限定されない。 The capacitor of the present invention uses platinum foil, gold foil, aluminum foil, carbon electrode coated with activated carbon powder on the current collector aluminum foil as an electrode, and an aliphatic polyketone fiber paper separator between two electrodes of the same type. It can be produced by interposing electrodes to avoid contact between the electrodes and impregnating the separator with an electrolytic solution. Industrially, it is compacted by winding or laminating electrodes to improve the energy density (capacity) of the capacitor, but since the separator is thin while maintaining toughness, the electrical internal resistance is low, and The energy density can be further increased. The capacitor of the present invention is not limited to the type of electrode and the manufacturing method. Moreover, although two types, an aqueous type and an organic type, are industrially used as the electrolytic solution, it is not limited to the type of the electrolytic solution.
本発明のコンデンサー用電極セパレーターは、脂肪族ポリケトン繊維を含む繊維紙であり、脂肪族ポリケトン繊維の融点付近で急激に軟化し変形する性質を利用し、脂肪族ポリケトン繊維同士の全部または一部が熱融着していることを特徴とする。したがって、薄くてもまた多孔性であっても均一で強靭なコンデンサー用電極セパレーターを提供することができる。 The electrode separator for a capacitor of the present invention is a fiber paper containing aliphatic polyketone fibers, and utilizes the property of rapidly softening and deforming near the melting point of the aliphatic polyketone fibers. It is characterized by heat fusion. Therefore, it is possible to provide a capacitor electrode separator that is uniform and tough even if it is thin or porous.
本発明のコンデンサー用電極セパレーターの厚さは５〜２００μｍであることが好ましい。より好ましくは５〜１００μｍ、さらに好ましくは５〜７０μｍである。５〜２００μｍにすることで通常使用している紙と同じように扱うことができ、柔軟で、加工性に富み、形状を容易に変形、裁断することができる。また、電解液の含浸性にも適し、コンデンサーとしての電気的内部抵抗を低くすることができる。５μｍ以上の厚さでセパレーターの強度を維持することができる。また、２００μｍ以下の厚さで柔軟性、加工性が良く、ボタン型、積層型コンデンサーなどはもちろん、とくに捲回型コンデンサーの加工に適している。 The thickness of the capacitor electrode separator of the present invention is preferably 5 to 200 μm. More preferably, it is 5-100 micrometers, More preferably, it is 5-70 micrometers. By setting the thickness to 5 to 200 μm, it can be handled in the same way as the paper that is normally used, flexible, rich in workability, and can be easily deformed and cut. Moreover, it is suitable also for the impregnation property of electrolyte solution, and can reduce the electrical internal resistance as a capacitor. The strength of the separator can be maintained at a thickness of 5 μm or more. In addition, it has a thickness of 200 μm or less and has good flexibility and workability, and is particularly suitable for the processing of wound type capacitors as well as button type and multilayer type capacitors.
本発明のコンデンサー用電極セパレーターの空隙率は３０〜９０％であることが好ましい。
空隙率＝｛１-（繊維紙を構成する繊維の総質量／構成する繊維の密度）／（繊維紙の厚さ×面積）｝×１００
より好ましくは３５〜８５％、さらに好ましくは４０〜８５％である。空隙率を３０％以上とすることで電解液の浸透を容易にすることができ、また、電気的内部抵抗を低くすることができる。また、空隙率を９０％以下とすることで電極セパレーターとして必要な強度を得ることができる。
The porosity of the capacitor electrode separator of the present invention is preferably 30 to 90%.
Porosity = {1− (total mass of fibers constituting fiber paper / density of fibers constituting fiber) / (thickness of fiber paper × area)} × 100
More preferably, it is 35-85%, More preferably, it is 40-85%. By setting the porosity to 30% or more, the penetration of the electrolytic solution can be facilitated, and the electrical internal resistance can be lowered. Moreover, the intensity | strength required as an electrode separator can be obtained by making a porosity into 90% or less.
本発明のコンデンサー用電極セパレーターに使用する脂肪族ポリケトン繊維は下記式（１）で示される繰り返し単位を含む構造を有する。好ましくは下記式（１）で示される繰り返し単位が９０モル％以上からなる構造を有する。より好ましくは９８モル％以上、さらに好ましくは１００モル％である。
−ＣＨ２−ＣＨ２−ＣＯ− （１）
The aliphatic polyketone fiber used for the capacitor electrode separator of the present invention has a structure containing a repeating unit represented by the following formula (1). Preferably, it has a structure in which the repeating unit represented by the following formula (1) is 90 mol% or more. More preferably, it is 98 mol% or more, More preferably, it is 100 mol%.
—CH 2 —CH 2 —CO— (1)
繰り返し単位が９０モル％以上であると高強度、高弾性を得ることができ、耐熱性にも優れる。また、該繊維の結晶化度は３０％以上が好ましい。より好ましくは５０％以上、さらに好ましくは６０％以上である。３０％以上であると高強度、高弾性を発現し、非常に優れた寸法安定性を得る。ポリケトン繊維の製法としては亜鉛塩、カルシウム塩、イソシアネート塩などを用いたポリケトン水溶液から湿式紡糸法で得たうえで、熱延伸して製造したポリケトン繊維が高強度、高弾性を有しており、好ましい。 When the repeating unit is 90 mol% or more, high strength and high elasticity can be obtained, and heat resistance is also excellent. Further, the crystallinity of the fiber is preferably 30% or more. More preferably, it is 50% or more, More preferably, it is 60% or more. When it is 30% or more, high strength and high elasticity are exhibited, and very excellent dimensional stability is obtained. Polyketone fiber produced by hot spinning from a polyketone aqueous solution using zinc salt, calcium salt, isocyanate salt, etc. as a production method of polyketone fiber, and hot-stretched polyketone fiber has high strength and high elasticity. preferable.
本発明のコンデンサー用電極セパレーターを構成する繊維に使用する脂肪族ポリケトン繊維は繊維長０．５〜１０ｍｍにカットされた短繊維であることが好ましい。繊維長０．５ｍｍ以上とすることで抄紙時の紙強度を維持できる。好ましくは１ｍｍ以上である。また、繊維長を１０ｍｍ以下とすることで抄紙時の分散均一性を向上し、厚さむらを低減することができる。好ましくは７ｍｍ以下である。
本発明のコンデンサー用電極セパレーターを構成する繊維に使用する脂肪族ポリケトン繊維は均一で薄いシートを作製するために平均繊維径２０μｍ以下であることが好ましい。より好ましくは１７μｍ以下である。またシートを熱融着させる際の強度を保つために平均繊維径は０．１μｍ以上が好ましい。
The aliphatic polyketone fiber used for the fiber constituting the capacitor electrode separator of the present invention is preferably a short fiber cut to a fiber length of 0.5 to 10 mm. By setting the fiber length to 0.5 mm or more, it is possible to maintain the paper strength during paper making. Preferably it is 1 mm or more. Moreover, the dispersion uniformity at the time of papermaking can be improved by making fiber length 10 mm or less, and thickness nonuniformity can be reduced. Preferably it is 7 mm or less.
The aliphatic polyketone fibers used for the fibers constituting the capacitor electrode separator of the present invention preferably have an average fiber diameter of 20 μm or less in order to produce a uniform and thin sheet. More preferably, it is 17 μm or less. The average fiber diameter is preferably 0.1 μm or more in order to maintain the strength when the sheet is heat-sealed.
本発明のコンデンサー用電極セパレーターを構成する繊維は脂肪族ポリケトン繊維を１〜９９質量％と、他の繊維を９９〜１質量％混合されることが好ましい。より好ましくは脂肪族ポリケトン繊維が１０〜９５質量％である。該ポリケトン繊維が１質量％以上でポリケトン繊維の持つ高強度、高耐熱性の特質が現れる。また、９９質量％以下で他の繊維の特質を該繊維紙に付与することができる。 The fibers constituting the capacitor electrode separator of the present invention are preferably mixed with 1 to 99% by weight of aliphatic polyketone fibers and 99 to 1% by weight of other fibers. More preferably, the aliphatic polyketone fiber is 10 to 95% by mass. When the polyketone fiber is 1% by mass or more, the high strength and high heat resistance characteristics of the polyketone fiber appear. Moreover, the characteristic of another fiber can be provided to this fiber paper at 99 mass% or less.
本発明に用いる他の繊維としては、天然繊維、再生天然繊維、無機繊維および／または合成繊維などを挙げることができる。たとえば、天然繊維としては綿、麻、木材などのセルロース繊維などを例示できる。再生天然繊維としてはビスコース繊維、レーヨン繊維、溶剤紡糸セルロース繊維などを挙げることができる。無機繊維としてはガラス繊維、カーボンファイバー、金属繊維などを挙げることができる。合成繊維としてはポリエチレン、ポリプロピレン、ナイロン、ポリエステル、ポリアクリロニトリルなどを挙げることができる。とくに、耐熱性合成繊維である全芳香族ポリアミド繊維（ｐ-フェニレンテレフタラミド繊維やｐ-フェニレンジフェニールエーテルテレフタラミド繊維（以下、これらを「パラ型アラミド繊維」という））、全芳香族ポリエステル繊維、ポリパラフェニレンベンゾビスオキサゾール（以下ＰＢＯ）繊維、ポリイミド繊維、ポリフェニレンサルファイド繊維、ポリテトラフルオロエチレン繊維などを用いると、さらに耐熱性を上げることができる。また、他の繊維として１種類でも、あるいは複数種類組み合わせて該ポリケトン繊維と混合し、他の繊維の持つ特徴を併せ持った繊維紙を作ることができる。これら他の繊維の繊維長は該ポリケトン繊維と同様に０．５〜１０ｍｍの長さが好ましい。また、平均繊維径も０．１〜２０μｍが好ましい。 Examples of other fibers used in the present invention include natural fibers, regenerated natural fibers, inorganic fibers and / or synthetic fibers. For example, examples of natural fibers include cellulose fibers such as cotton, hemp, and wood. Examples of the regenerated natural fiber include viscose fiber, rayon fiber, and solvent-spun cellulose fiber. Examples of inorganic fibers include glass fibers, carbon fibers, and metal fibers. Examples of synthetic fibers include polyethylene, polypropylene, nylon, polyester, polyacrylonitrile, and the like. In particular, wholly aromatic polyamide fibers (p-phenylene terephthalamide fibers and p-phenylene diphenyl ether terephthalamide fibers (hereinafter referred to as “para-aramid fibers”)), wholly aromatic synthetic fiber When polyester fiber, polyparaphenylene benzobisoxazole (hereinafter referred to as PBO) fiber, polyimide fiber, polyphenylene sulfide fiber, polytetrafluoroethylene fiber, or the like is used, the heat resistance can be further increased. Further, one kind of other fibers or a combination of plural kinds of fibers can be mixed with the polyketone fiber to produce a fiber paper having the characteristics of other fibers. The fiber length of these other fibers is preferably 0.5 to 10 mm as in the case of the polyketone fiber. The average fiber diameter is also preferably 0.1 to 20 μm.
本発明のコンデンサー用電極セパレーターに用いる繊維紙は湿式抄造法で作製することができる。上述のポリケトン短繊維１〜９９質量％と他の繊維９９〜１質量％を離解機で水に均一に分散した後、円網抄紙機、長網抄紙機、または傾斜短網抄紙機、あるいはそれらを組み合わせたコンビネーション抄紙機などで抄造し、網上に該繊維が平面状に均一に分散した紙層を形成する。その後、ドラムドライヤー、ヤンキードライヤー、熱風ドライヤーなどの乾燥機で十分乾燥して、最終的に熱プレスなどでポリケトン繊維同士の全部または一部が、またはポリケトン繊維が他の繊維と融着して紙の最終強度を発現させる。 The fiber paper used for the capacitor electrode separator of the present invention can be produced by a wet papermaking method. After the above-mentioned polyketone short fibers 1-99% by mass and other fibers 99-1% by mass are uniformly dispersed in water by a disaggregator, a circular net paper machine, a long net paper machine, an inclined short net paper machine, or the like And a paper layer in which the fibers are uniformly dispersed in a planar shape is formed on a net. Then, the paper is thoroughly dried with a dryer such as a drum dryer, Yankee dryer, hot air dryer, etc., and finally, all or part of the polyketone fibers or the polyketone fibers are fused with other fibers by a hot press. To develop the final strength.
以上は典型的な製造方法であるが、本発明の電極セパレーターは該製造方法に限定されない。たとえば、ポリケトン繊維１〜９９質量％と他の繊維９９〜１質量％を混合する際は離解機で同時に混合しても、また別々に離解した後混合してもよく、何ら限定されない。また、抄造前に該ポリケトン繊維の全部または一部を叩解、破砕などの処理をしてフィブリル化し、および／または、他の繊維の全部または一部を叩解、破砕などの処理をしてフィブリル化してから混合しても、あるいはポリケトン繊維と他の繊維を混合後、同時に叩解、破砕などの処理をしてもよく、叩解、破砕などの処理によって紙層強度を増して生産スピードを上げ、生産性向上を可能にしたり、フィブリル化したμｍからサブμｍのポリケトン繊維および／または他の繊維の細径繊維を用いてμｍからサブμｍの孔径（繊維で囲まれた開口部）を均一に分布させたコンデンサー用電極セパレーターを造ることができるが、本発明は叩解、破砕などの処理によっても何ら限定されるものではない。さらに、１００％ポリケトン繊維紙をあらかじめ作製し、その後、ポリケトン繊維および／または他の繊維を１００％ポリケトン繊維紙の上に抄紙してもよく、あるいは、ポリケトン繊維および／または他の繊維を１００％ポリケトン繊維紙の表裏両面に抄紙してもよく、またその工程順を反対に作製してもよく、製法には何ら限定されない。 Although the above is a typical manufacturing method, the electrode separator of this invention is not limited to this manufacturing method. For example, when mixing 1 to 99% by mass of polyketone fibers and 99 to 1% by mass of other fibers, they may be mixed at the same time with a disaggregator, or may be mixed after being disaggregated separately, without any limitation. Before paper making, all or part of the polyketone fiber is fibrillated by pulverization and crushing, and / or all or part of other fiber is fibrillated by pulverization and crushing. Or after mixing polyketone fibers and other fibers, beating and crushing can be performed at the same time. By processing such as beating and crushing, the paper layer strength is increased to increase production speed and production. The pore size (openings surrounded by the fibers) can be evenly distributed by using polyketone fibers and / or fine fibers of other fibers that are fibrillated and / or fine fibers. However, the present invention is not limited in any way by beating, crushing or the like. Further, 100% polyketone fiber paper may be pre-made, and then polyketone fibers and / or other fibers may be made on 100% polyketone fiber paper, or 100% polyketone fibers and / or other fibers may be made. Paper production may be performed on both the front and back sides of the polyketone fiber paper, and the process order may be reversed, and the production method is not limited at all.
脂肪族ポリケトン繊維同士の全部または一部を熱融着させるためにはポリケトン繊維の融点温度の−４０℃〜＋４０℃で熱プレスすることが好ましい。融点温度の−４０℃以上の熱プレスでポリケトン繊維が熱融着する。また、融点温度の＋４０℃以下の熱プレスでは溶融、焼け付きを起こさず好ましい。熱プレス時のプレス線圧は公知の範囲で実施することができるが、厚さをコントロールするために１〜２００ｋＮ／ｍが好ましい。
本発明のコンデンサー用電極セパレーターは熱可塑性樹脂、あるいは熱硬化性樹脂を含浸または塗布して強度をさらに高めたり、加工性や別の機能をコンデンサー用電極セパレーターに付与することもできる。
本発明の繊維紙を２枚以上重ねてコンデンサー用電極セパレーターに用いてもよい。
In order to thermally fuse all or part of the aliphatic polyketone fibers, it is preferable to heat press at a melting point temperature of the polyketone fibers of −40 ° C. to + 40 ° C. The polyketone fiber is heat-sealed by hot pressing at a melting point of −40 ° C. or higher. In addition, a hot press having a melting point temperature of + 40 ° C. or lower is preferable because it does not cause melting or seizure. The press linear pressure at the time of hot pressing can be carried out within a known range, but is preferably 1 to 200 kN / m in order to control the thickness.
The capacitor electrode separator of the present invention can be impregnated or coated with a thermoplastic resin or a thermosetting resin to further increase the strength, or processability and other functions can be imparted to the capacitor electrode separator.
Two or more of the fiber papers of the present invention may be stacked and used as a capacitor electrode separator.
本発明を実施例に基づいて更に具体的に説明するが、本発明はこれら実施例などにより何ら限定されるものではない。
コンデンサー用電極セパレーターに使用した繊維の種類、形状などを表１に、コンデンサー用電極セパレーターの構成要件、および該セパレーターを用いたコンデンサーの特性測定結果を表２に示す。
The present invention will be more specifically described based on examples, but the present invention is not limited to these examples.
Table 1 shows the types and shapes of the fibers used in the capacitor electrode separator, and Table 2 shows the constituent requirements of the capacitor electrode separator and the measurement results of the characteristics of the capacitor using the separator.
[実施例１]
平均繊維径１０μｍ、繊維長３ｍｍの脂肪族ポリケトン短繊維７０質量％に、叩解してフィブリル化した溶剤紡糸セルロース繊維３０質量％を加え、消泡剤を添加し、高速離解機で水分散し繊維分散液を調整した。この繊維分散液に粘剤を添加し、抄紙直前で真空脱気を行い、１００メッシュの抄紙網を備えた円網抄紙機で抄紙し、表面温度２７５℃の熱プレスロールを追加した表面温度１３０℃のヤンキードライヤーで加熱乾燥し、厚さ５０μｍ、空隙率７０％のコンデンサー用電極セパレーターを得た。コンデンサーはテストセル内に該セパレーターを用いて炭素電極で挟み２３０℃、３時間の真空加熱乾燥後、真空状態で電解液を該セパレーター内に含浸させ、作製した。
[Example 1]
Add 30% by mass of beaten and fibrillated solvent-spun cellulose fiber to 70% by mass of aliphatic polyketone short fiber with an average fiber diameter of 10μm and fiber length of 3mm, add an antifoaming agent, and disperse in water with a high-speed disintegrator. The dispersion was adjusted. The fiber dispersion was added with a sticky agent, vacuum degassed immediately before paper making, paper was made with a circular paper machine equipped with a 100 mesh paper net, and a surface temperature of 130 with a hot press roll having a surface temperature of 275 ° C. was added. The electrode separator for a capacitor having a thickness of 50 μm and a porosity of 70% was obtained by heating and drying with a Yankee dryer at 0 ° C. The capacitor was produced by sandwiching the separator in a test cell with a carbon electrode and drying by vacuum heating at 230 ° C. for 3 hours, and then impregnating the separator with the electrolyte in a vacuum state.
[実施例２〜１３]
実施例１と同様の製造方法を用いて、表２に示す脂肪族ポリケトン繊維および他の繊維を用いたコンデンサー用電極セパレーターを得た。製造方法中の条件の異なる部分については表２に記載した。該セパレーターを用いて実施例１と同様の方法でコンデンサーを作製した。
[Examples 2 to 13]
Using the same production method as in Example 1, capacitor electrode separators using aliphatic polyketone fibers and other fibers shown in Table 2 were obtained. The parts with different conditions in the manufacturing method are shown in Table 2. A capacitor was produced in the same manner as in Example 1 using the separator.
[比較例１]
平均繊維径１２μｍ、繊維長３ｍｍのパラ型アラミド繊維５０質量％とＰＢＯ繊維５０質量％に消泡剤を添加し、高速離解機で水分散し繊維分散液を調整した。この繊維分散液に粘剤を添加し、抄紙直前で真空脱気を行い、１００メッシュの抄紙網を備えた円網抄紙機で抄紙し、上限温度３５０℃にした熱プレスロールを追加した表面温度１３０℃のヤンキードライヤーで加熱乾燥した。しかし、パラ型アラミド繊維およびＰＢＯ繊維ともに軟化温度に到達せず、繊維紙の強度は発現しなかった。
[Comparative Example 1]
An antifoaming agent was added to 50% by mass of para-type aramid fibers having an average fiber diameter of 12 μm and a fiber length of 3 mm and 50% by mass of PBO fibers, and water-dispersed with a high-speed disintegrator to prepare a fiber dispersion. A surface temperature obtained by adding a sticky agent to this fiber dispersion, performing vacuum degassing just before paper making, making paper with a circular paper machine equipped with a 100 mesh paper net, and adding a hot press roll with an upper limit temperature of 350 ° C. It heat-dried with the 130 degreeC Yankee dryer. However, neither the para-type aramid fiber nor the PBO fiber reached the softening temperature, and the strength of the fiber paper was not expressed.
[比較例２〜４]
実施例１と同様の製造方法を用いて、表２に示す他の繊維を組み合わせて配合したコンデンサー用電極セパレーターを得た。製造方法中の条件の異なる部分については表２に記載した。該セパレーターを用いて実施例１と同様の方法でコンデンサーを作製したが、乾燥温度が高すぎて、比較例２および４の電極セパレーターは溶融、変形を、また比較例３の電極セパレーターは炭化したので、１６０℃、２４時間かけて乾燥した。
[Comparative Examples 2 to 4]
Using the same production method as in Example 1, a capacitor electrode separator was prepared by combining and combining the other fibers shown in Table 2. The parts with different conditions in the manufacturing method are shown in Table 2. A capacitor was produced using the separator in the same manner as in Example 1, but the drying temperature was too high, the electrode separators of Comparative Examples 2 and 4 melted and deformed, and the electrode separator of Comparative Example 3 was carbonized. Therefore, it was dried at 160 ° C. for 24 hours.
実施例１〜１３および比較例２〜４で作製した電極セパレーターを以下の方法で評価比較した。
厚さ：マイクロメータで測定し、５点平均値とした。
厚さむら：上記測定について
変化率（％）＝（最大値−最小値）×１００／平均値
○：変化率 １０％未満のもの
△：変化率 １０％以上２０％未満のもの
×：変化率 ２０％以上のもの
引張強さ：定速伸張形引張試験機を用い、試験片幅１５ｍｍ、試験片長１００ｍｍの試験片を伸張速度３００ｍｍ／ｍｉｎで伸張し、破断までの最大荷重を測定し、５点平均値を引張強さ（ｋＮ／ｍ）とした。
透気度：ガーレー式デンソメーターを用いて６．４５ｃｍ２のセパレーター面積を１００ｍｌの空気が通過する時間を測定し、５点平均値とした。
The electrode separators produced in Examples 1 to 13 and Comparative Examples 2 to 4 were evaluated and compared by the following methods.
Thickness: Measured with a micrometer and averaged at 5 points.
Unevenness of thickness: About the above measurement Change rate (%) = (maximum value−minimum value) × 100 / average value ○: Change rate of less than 10% Δ: Change rate of 10% or more and less than 20% ×: Change rate 20% or more Tensile strength: Using a constant speed extension type tensile tester, a test piece having a test piece width of 15 mm and a test piece length of 100 mm is stretched at an extension speed of 300 mm / min, and the maximum load until breakage is measured. The point average value was taken as the tensile strength (kN / m).
Air permeability: Using a Gurley type densometer, the time required for 100 ml of air to pass through a separator area of 6.45 cm 2 was measured, and an average value of five points was obtained.
また、上記により作製した電極セパレーターを用いたコンデンサー（電気二重層キャパシタ）は、三電極型セル（電極径２０ｍｍΦ，厚さ約０．５ｍｍ）を用い、電極として活性炭を用いた炭素電極（活性炭：導電剤：バインダー＝１０：１：１）を用い、電解液として１．８Ｍトリエチルメチルアンモニウム・ＢＦ4塩／プロピレンカーボネート溶液（富山薬品工業社製）を用い作製し、パワーシステム社製の充放電試験機（ＣＤＴ５Ｒ０２-４）を用いて、以下の充放電条件で内部抵抗、静電容量の評価を行った。
充放電条件：０．５ｍＡ／２．５Ｖの定電流定電圧による充電後、０．５ｍＡ／０Ｖの定電流で放電した。
In addition, a capacitor (electric double layer capacitor) using the electrode separator produced as described above uses a three-electrode cell (electrode diameter: 20 mmΦ, thickness: about 0.5 mm), and a carbon electrode using activated carbon as an electrode (activated carbon: Conductive agent: binder = 10: 1: 1), and 1.8M triethylmethylammonium / BF4 salt / propylene carbonate solution (manufactured by Toyama Pharmaceutical Co., Ltd.) as the electrolytic solution, and charge / discharge test manufactured by Power System Co., Ltd. Using a machine (CDT5R02-4), internal resistance and capacitance were evaluated under the following charge / discharge conditions.
Charging / discharging conditions: After charging with a constant current and constant voltage of 0.5 mA / 2.5 V, discharging was performed with a constant current of 0.5 mA / 0 V.
内部抵抗：放電初期（総放電時間の１０％に相当する初期放電時間）でのＩＲドロップから算出し、これを電極面積当たりの抵抗値（Ω／ｃｍ２）に換算した。
静電容量：エネルギー換算法すなわち、放電電力Ｅ＝（１／２）ＣＶ２（Ｃ：静電容量，Ｖ：放電電圧）の関係からＣを算出した。
Internal resistance: Calculated from the IR drop at the beginning of discharge (initial discharge time corresponding to 10% of the total discharge time), and converted to a resistance value (Ω / cm 2 ) per electrode area.
Capacitance: C was calculated from the energy conversion method, that is, the relationship of discharge power E = (1/2) CV 2 (C: capacitance, V: discharge voltage).
本発明のポリケトン繊維紙を電極セパレーターとして用いたコンデンサー、および、コンデンサー用電極セパレーターは、電解型コンデンサーに向いており、とくに電極セパレーターが薄いことなどから、高容量で内部抵抗の小さい大電流の充放電が可能な電気二重層キャパシタ、アルミ電解コンデンサー等イオンを用いた湿式コンデンサーなどの用途で好適に利用できる。また、耐熱性、強度、寸法安定性のよいことなどからコンデンサーの生産性も高くすることができる。 Capacitors using the polyketone fiber paper of the present invention as an electrode separator and electrode separators for capacitors are suitable for electrolytic capacitors. Especially, since the electrode separator is thin, high capacity and small internal resistance are charged. It can be suitably used in applications such as electric double layer capacitors capable of discharging, wet capacitors using ions such as aluminum electrolytic capacitors. In addition, the productivity of the capacitor can be increased due to good heat resistance, strength, and dimensional stability.
Claims (7)
−ＣＨ２−ＣＨ２−ＣＯ− （１） An electrode separator for a capacitor comprising polyketone-containing fiber paper in which 1 to 99% by mass of the constituent fibers are aliphatic polyketone fibers containing a repeating unit represented by the following formula (1).
—CH 2 —CH 2 —CO— (1)
空隙率＝｛１-（繊維紙を構成する繊維の総質量／構成する繊維の密度）／（繊維紙の厚さ×面積）｝×１００ The electrode separator for a capacitor according to claim 1 or 2, wherein the porosity of the fiber paper represented below is 30 to 90%.
Porosity = {1− (total mass of fibers constituting fiber paper / density of fibers constituting fiber) / (thickness of fiber paper × area)} × 100
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009064959A (en) * | 2007-09-06 | 2009-03-26 | Hitachi Aic Inc | Aluminum electrolytic capacitor |
| JP2010062312A (en) * | 2008-09-03 | 2010-03-18 | Nippon Kodoshi Corp | Solid electrolytic capacitor |
| JP2010062311A (en) * | 2008-09-03 | 2010-03-18 | Nippon Kodoshi Corp | Separator for solid electrolytic capacitor |
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| JPH0461216A (en) * | 1990-06-29 | 1992-02-27 | Nippon Chemicon Corp | Electrolytic capacitor |
| JPH09324355A (en) * | 1996-06-06 | 1997-12-16 | Kuraray Co Ltd | Nonwoven fabric |
| JP2001207335A (en) * | 2000-01-27 | 2001-08-03 | Asahi Kasei Corp | Fibrillar material and method for producing the same |
| JP2002266281A (en) * | 2001-02-28 | 2002-09-18 | Mitsubishi Paper Mills Ltd | Wet type nonwoven fabric, separator for electrochemical element and separator for electric double layer capacitor by using the same fabric |
| JP2003157822A (en) * | 2001-09-07 | 2003-05-30 | Carl Freudenberg Kg | Alkaline battery or storage battery |
| JP2005163237A (en) * | 2003-12-04 | 2005-06-23 | Asahi Kasei Fibers Corp | High-strength nonwoven fabric |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0461216A (en) * | 1990-06-29 | 1992-02-27 | Nippon Chemicon Corp | Electrolytic capacitor |
| JPH09324355A (en) * | 1996-06-06 | 1997-12-16 | Kuraray Co Ltd | Nonwoven fabric |
| JP2001207335A (en) * | 2000-01-27 | 2001-08-03 | Asahi Kasei Corp | Fibrillar material and method for producing the same |
| JP2002266281A (en) * | 2001-02-28 | 2002-09-18 | Mitsubishi Paper Mills Ltd | Wet type nonwoven fabric, separator for electrochemical element and separator for electric double layer capacitor by using the same fabric |
| JP2003157822A (en) * | 2001-09-07 | 2003-05-30 | Carl Freudenberg Kg | Alkaline battery or storage battery |
| JP2005163237A (en) * | 2003-12-04 | 2005-06-23 | Asahi Kasei Fibers Corp | High-strength nonwoven fabric |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009064959A (en) * | 2007-09-06 | 2009-03-26 | Hitachi Aic Inc | Aluminum electrolytic capacitor |
| JP2010062312A (en) * | 2008-09-03 | 2010-03-18 | Nippon Kodoshi Corp | Solid electrolytic capacitor |
| JP2010062311A (en) * | 2008-09-03 | 2010-03-18 | Nippon Kodoshi Corp | Separator for solid electrolytic capacitor |
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