JPH05326326A - Electric double layer capacitor and its manufacture - Google Patents
Electric double layer capacitor and its manufactureInfo
- Publication number
- JPH05326326A JPH05326326A JP12706192A JP12706192A JPH05326326A JP H05326326 A JPH05326326 A JP H05326326A JP 12706192 A JP12706192 A JP 12706192A JP 12706192 A JP12706192 A JP 12706192A JP H05326326 A JPH05326326 A JP H05326326A
- Authority
- JP
- Japan
- Prior art keywords
- current collector
- double layer
- electric double
- electrode
- layer capacitor
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
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
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、内部抵抗の低減を図っ
た電気二重層キャパシタとその製造方法に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric double layer capacitor having a reduced internal resistance and a method for manufacturing the same.
【0002】[0002]
【従来の技術】電気二重層キャパシタは、活性炭と電解
液との界面に形成される電気二重層に蓄積される電気エ
ネルギーを利用するもので、ファラッドオーダの電気容
量を瞬時に充放電できる大容量コンデンサである。2. Description of the Related Art An electric double layer capacitor utilizes electric energy accumulated in an electric double layer formed at an interface between activated carbon and an electrolytic solution, and has a large capacity capable of instantaneously charging and discharging the electric capacity of farad order. It is a capacitor.
【0003】従来、電気二重層キャパシタの分極性電極
としては、粉末状活性炭を硫酸水溶液で加圧成形したも
のや、片面に金属溶射層を形成した活性炭繊維布などを
用いてきた。またコンデンサの単位体積当たりの容量密
度を向上させるために、分極性電極を焼結して固形の板
状にしたものも提案されている。固形の分極性電極を用
いた電気二重層キャパシタの内部抵抗の低減を図ったも
のとしては例えば図3に示すようなものがある(特開平
−80517号公報)。7は活性炭粉末やカーボンブラ
ック粉末などの導電性粉末をプレス焼結して高密度化し
た板状の集電体、8は前記集電体の一方の面に希硫酸等
の電解液を含浸させた活性炭粉末を焼結して一体に付着
形成した分極性電極、9はセパレータ、10はガスケッ
トである。Heretofore, as the polarizable electrode of the electric double layer capacitor, powdered activated carbon which has been pressure-molded with an aqueous solution of sulfuric acid, activated carbon fiber cloth having a metal sprayed layer formed on one surface, and the like have been used. In addition, in order to improve the capacity density per unit volume of the capacitor, it has been proposed to sinter the polarizable electrode into a solid plate shape. An example of an electric double layer capacitor using a solid polarizable electrode to reduce the internal resistance is shown in FIG. 3 (Japanese Patent Laid-Open No. 80517). 7 is a plate-shaped current collector obtained by press-sintering conductive powder such as activated carbon powder or carbon black powder to densify, and 8 is one surface of the current collector impregnated with an electrolytic solution such as dilute sulfuric acid. A polarizable electrode formed by sintering activated carbon powder is integrally formed, a separator 9 and a gasket 10.
【0004】[0004]
【発明が解決しようとする課題】このような従来の電気
二重層キャパシタでは、板状の集電体をプレス焼結成形
し、前記集電体の上に分極性電極を焼結成形しているた
め、前記板状の集電体と前記分極性電極との間には界面
が存在し接触抵抗が大きい。このため、前記板状集電体
と分極性電極より形成される電極体を用いた電気二重層
キャパシタは、内部抵抗が高いという問題を有してい
た。In such a conventional electric double layer capacitor, a plate-shaped current collector is press-sintered and a polarizable electrode is sinter-molded on the current collector. Therefore, an interface exists between the plate-shaped current collector and the polarizable electrode, and the contact resistance is large. Therefore, the electric double layer capacitor using the electrode body formed of the plate-shaped current collector and the polarizable electrode has a problem of high internal resistance.
【0005】本発明は上記課題を解決するもので、集電
体と分極性電極との間の接触抵抗を極めて小さくし、内
部抵抗が低い電気二重層キャパシタとその製造方法を提
供することを目的としている。The present invention has been made to solve the above problems, and an object of the present invention is to provide an electric double layer capacitor having a low contact resistance between a current collector and a polarizable electrode and a low internal resistance, and a method for manufacturing the same. I am trying.
【0006】[0006]
【課題を解決するための手段】本発明は上記目的を達成
するために、集電体材料と分極性電極材料とからなる傾
斜材料を含む構造体を用いた。即ち、電極体中において
集電体側から分極性電極方向に向けて活性炭の組成を増
加させている。In order to achieve the above object, the present invention uses a structure including a gradient material composed of a current collector material and a polarizable electrode material. That is, in the electrode body, the composition of activated carbon is increased from the side of the current collector toward the polarizable electrode.
【0007】また、その製造方法として一方の面から他
方の面に向けて集電体材料を100〜0%、分極性電極
材料を同様に0〜100%含み両面の間で両方の材料組
成が段階的または連続的に変化する傾斜材料を含む構造
体を用いるか、または集電体と分極性電極の材料とを積
層させたものを用いる。As a manufacturing method thereof, 100 to 0% of a current collector material and 0 to 100% of a polarizable electrode material are similarly included from one surface toward the other surface, and both material compositions are provided between both surfaces. A structure including a graded material that changes stepwise or continuously is used, or a stack of a current collector and a material for a polarizable electrode is used.
【0008】[0008]
【作用】本発明は上記した構成により、電極体が集電体
と分極性電極の傾斜材料体であるので、前記電極体内で
前記集電体と前記分極性電極が連続しており、前記集電
体と前記分極性電極との間の接触抵抗が極めて小さくで
きる。よって、前記電極体を用いることにより電気二重
層キャパシタの内部抵抗を低減することができる。According to the present invention, since the electrode body is the gradient material body of the current collector and the polarizable electrode according to the above-mentioned constitution, the current collector and the polarizable electrode are continuous in the electrode body, and The contact resistance between the electric body and the polarizable electrode can be made extremely small. Therefore, the internal resistance of the electric double layer capacitor can be reduced by using the electrode body.
【0009】[0009]
【実施例】本発明の具体的な実施例を図面に従って以下
に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings.
【0010】(実施例1)集電体の材料として、黒鉛粉
末と非ノボラック、非レゾール型フェノール樹脂とを重
量比7:3で混合した粉末(以下これを集電体材料と呼
ぶ)を調製する。また分極性電極材料として、フェノー
ル樹脂系活性炭と非ノボラック、非レゾール型フェノー
ル樹脂とを重量比7:3で混合した粉末(以下これを分
極性電極材料と呼ぶ)を調製する。次に上記集電体材料
と上記分極性電極材料を重量比(a)10:0,(b)
8:2,(c)6:4,(d)4:6,(e)2:8,
(f)0:10に調合し、これらをプレス金型内に所定
の厚さで(a)から(f)まで順番に積層する。積層し
た集電体材料と分極性電極材料をプレス温度120−2
00℃、プレス圧100−400kg/cm2でプレス成形
する。このようにプレス成形して得られた成型体を不活
性雰囲気中600−1000℃で焼結して電極体を形成
した。(Example 1) As a current collector material, a powder (hereinafter referred to as a current collector material) in which graphite powder and a non-novolak or non-resole type phenol resin were mixed at a weight ratio of 7: 3 was prepared. To do. As the polarizable electrode material, a powder (hereinafter referred to as a polarizable electrode material) in which a phenol resin-based activated carbon and a non-novolak or non-resol type phenol resin are mixed at a weight ratio of 7: 3 is prepared. Next, the current collector material and the polarizable electrode material are mixed in a weight ratio (a) of 10: 0, (b).
8: 2, (c) 6: 4, (d) 4: 6, (e) 2: 8,
(F) The ingredients are mixed at 0:10, and these are sequentially laminated in a press die with a predetermined thickness from (a) to (f). Press the laminated current collector material and polarizable electrode material at a pressing temperature of 120-2.
Press molding is carried out at 00 ° C. and a pressing pressure of 100-400 kg / cm 2 . The molded body obtained by press molding in this manner was sintered at 600 to 1000 ° C. in an inert atmosphere to form an electrode body.
【0011】この電極体内では、前記集電体と前記分極
性電極が連続しており、前記集電体と前記分極性電極と
の間の接触抵抗が極めて小さい。In this electrode body, the current collector and the polarizable electrode are continuous, and the contact resistance between the current collector and the polarizable electrode is extremely small.
【0012】この電極体に電解液として30重量%の硫
酸を含浸し、セパレータとガスケットを用いて図1に示
す形状の電気二重層キャパシタを製造した。図1におい
て、1は電極体である。電極体中でセパレータ側は、活
性炭の量が多いため非常に比表面積が大きく、反対側
は、黒鉛の量が多いので非常に電気抵抗が低い。また2
はセパレータ、3はガスケットである。This electrode body was impregnated with 30% by weight of sulfuric acid as an electrolytic solution, and a separator and a gasket were used to manufacture an electric double layer capacitor having the shape shown in FIG. In FIG. 1, 1 is an electrode body. The separator side of the electrode body has a very large specific surface area because of the large amount of activated carbon, and the opposite side has a very low electric resistance because of the large amount of graphite. Again 2
Is a separator and 3 is a gasket.
【0013】なお、集電体の材料として黒鉛粉末を用い
たが、焼結後に導電性を有する物質であればこれに限定
されるものではなく、非ノボラック、非レゾール型フェ
ノール樹脂についても、硬化温度以下で溶融する熱硬化
型のバインダであればこれに限定されるものではない。Although graphite powder is used as the material of the current collector, it is not limited to this as long as it is a substance having conductivity after sintering, and non-novolak and non-resole type phenol resins are also cured. It is not limited to this as long as it is a thermosetting binder that melts at a temperature equal to or lower than the temperature.
【0014】なお、分極性電極の材料としてフェノール
樹脂系の活性炭を用いたが、活性炭であればこれに限定
されるものではなく、非ノボラック、非レゾール型フェ
ノール樹脂についても、硬化温度以下で溶融する熱硬化
型のバインダであればこれに限定されるものではない。Although phenolic resin-based activated carbon was used as the material of the polarizable electrode, it is not limited to this as long as it is activated carbon, and non-novolak and non-resole type phenolic resins are melted at a temperature below the curing temperature. The thermosetting binder is not limited to this.
【0015】なお、電解液として30重量%の硫酸を用
いたが、これに限定されるものではない。Although sulfuric acid of 30% by weight was used as the electrolytic solution, the electrolytic solution is not limited to this.
【0016】なお、セパレータとしてポリプロピレンの
多孔膜を用いたが、非電子伝導性でイオン透過性であれ
ばこれに限定されるものではない。Although a polypropylene porous film is used as the separator, it is not limited to this as long as it is non-electroconductive and ion-permeable.
【0017】本実施例による電気二重層キャパシタの内
部抵抗と従来例の電気二重層キャパシタの内部抵抗を
(表1)に比較して示す。従来例としては、図3に示す
構成で実施例1と同じ電解液と、セパレータを用いた。The internal resistance of the electric double layer capacitor according to the present embodiment and the internal resistance of the conventional electric double layer capacitor are shown in comparison with each other (Table 1). As a conventional example, the same electrolytic solution and separator as in Example 1 were used with the configuration shown in FIG.
【0018】この(表1)から明らかなように、本実施
例によれば従来例に比較して内部抵抗を低減することが
できる。As is clear from this (Table 1), according to this embodiment, the internal resistance can be reduced as compared with the conventional example.
【0019】[0019]
【表1】 [Table 1]
【0020】(実施例2)図2において複合電極材料体
4は、集電体部4aと分極性電極部4bとによって構成
されている。集電体部の材料として黒鉛粉末と非ノボラ
ック、非レゾール型樹脂とを重量比7:3で混合した粉
末と、分極性電極部の材料としてフェノール樹脂系活性
炭と非ノボラック、非レゾール型フェノール樹脂とを重
量比7:3で混合した粉末を積層する。積層した集電体
部の材料と分極性電極部の材料とをプレス温度120〜
200℃、プレス圧100〜400kg/cm2で同時にプ
レス成型する。プレス成型したものを不活性雰囲気中6
00〜1000℃で焼結して複合材料電極体4を形成し
た。(Embodiment 2) In FIG. 2, the composite electrode material body 4 is composed of a current collector portion 4a and a polarizable electrode portion 4b. A powder obtained by mixing graphite powder, a non-novolak, and a non-resole type resin in a weight ratio of 7: 3 as a material for the current collector part, and a phenol resin-based activated carbon, a non-novolac, and a non-resole type phenol resin as a material for the polarizable electrode part. And a powder mixture of and in a weight ratio of 7: 3 are laminated. The laminated collector material and the polarizable electrode material are pressed at a pressing temperature of 120-
Simultaneous press molding is performed at 200 ° C. and a pressing pressure of 100 to 400 kg / cm 2 . Press-molded product in an inert atmosphere 6
The composite material electrode body 4 was formed by sintering at 00 to 1000 ° C.
【0021】この複合材料電極体4に電解液として30
重量の硫酸を含浸し、セパレータ5とガスケット6を用
いて電気二重層キャパシタを製造した。The composite material electrode body 4 has an electrolyte solution of 30
An electric double layer capacitor was manufactured by impregnating a large amount of sulfuric acid and using the separator 5 and the gasket 6.
【0022】本実施例による電気二重層キャパシタの内
部抵抗と従来例の電気二重層キャパシタの内部抵抗を
(表2)に比較して示す。従来例としては、図3に示す
構成で実施例1と同じ電解液と、セパレータを用いた。The internal resistance of the electric double layer capacitor according to this embodiment and the internal resistance of the conventional electric double layer capacitor are shown in comparison with each other (Table 2). As a conventional example, the same electrolytic solution and separator as in Example 1 were used with the configuration shown in FIG.
【0023】この(表2)から明らかなように、本実施
例によれば従来例に比較して内部抵抗を低減することが
できる。As is clear from this (Table 2), according to this embodiment, the internal resistance can be reduced as compared with the conventional example.
【0024】[0024]
【表2】 [Table 2]
【0025】なお、集電体部、分極性電極部、電解液、
セパレータ、ガスケット等は、実施例1と同じでありこ
れらに限定されるものではない。The current collector, the polarizable electrode, the electrolytic solution,
The separator, the gasket, etc. are the same as those in the first embodiment and are not limited to these.
【0026】[0026]
【発明の効果】以上の説明から明らかなように、本発明
によれば集電体材料と分極性電極材料とからなる傾斜材
料を含む構造体を用い、また電極体中において集電体側
から分極性電極方向に向けて活性炭の組成を増加させる
ことにより前記電極体内で前記集電体と前記分極性電極
が連続しており、前記集電体と前記分極性電極との間の
接触抵抗が極めて小さくできる。よって、前記電極体を
用いることにより電気二重層キャパシタの内部抵抗を低
減することができる。As is apparent from the above description, according to the present invention, a structure including a gradient material composed of a current collector material and a polarizable electrode material is used, and the structure is divided from the current collector side in the electrode body. The current collector and the polarizable electrode are continuous in the electrode body by increasing the composition of the activated carbon toward the polar electrode, and the contact resistance between the current collector and the polarizable electrode is extremely high. Can be made smaller. Therefore, the internal resistance of the electric double layer capacitor can be reduced by using the electrode body.
【0027】また、その製造方法として一方の面から他
方の面に向けて集電体材料を100〜0%、分極性電極
材料を同様に0〜100%含み両面の間で両方の材料組
成が段階的または連続的に変化する傾斜材料を含む構造
体を用いるか、または集電体と分極性電極の材料とを積
層させたものを用いることにより、上記構造を容易に効
率よく製造することができる。As a manufacturing method thereof, 100 to 0% of a current collector material and 0 to 100% of a polarizable electrode material are also included from one surface toward the other surface, and both material compositions are provided between both surfaces. By using a structure containing a graded material that changes stepwise or continuously, or by using a laminate of a current collector and a material for a polarizable electrode, the above structure can be easily and efficiently manufactured. it can.
【図1】本発明の一実施例の電気二重層キャパシタの内
部構成を示す縦断面図FIG. 1 is a vertical cross-sectional view showing the internal structure of an electric double layer capacitor according to an embodiment of the present invention.
【図2】本発明の他の実施例の電気二重層キャパシタの
内部構成を示す縦断面図FIG. 2 is a vertical sectional view showing the internal structure of an electric double layer capacitor of another embodiment of the present invention.
【図3】従来の電気二重層キャパシタの内部構成を示す
縦断面図FIG. 3 is a vertical cross-sectional view showing the internal structure of a conventional electric double layer capacitor.
1 集電体材料と分極性電極材料からなる傾斜材料を含
む構造である電極体 2 セパレータ 3 ガスケット 4 複合材料電極体 4a 集電体部 4b 分極性電極部 5 セパレータ 6 ガスケット 7 集電体 8 分極性電極 9 セパレータ 10 ガスケット1 Electrode body having a structure including a gradient material composed of a current collector material and a polarizable electrode material 2 Separator 3 Gasket 4 Composite material electrode body 4a Current collector part 4b Polar electrode part 5 Separator 6 Gasket 7 Current collector 8 min Polar electrode 9 Separator 10 Gasket
───────────────────────────────────────────────────── フロントページの続き (72)発明者 野中 誠治 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiji Nonaka 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.
Claims (5)
パレーターと、電解液から構成される電気二重層キャパ
シタであって、前記電極体が前記集電体と前記分極性電
極それぞれの材料から構成される傾斜材料を含む構造体
であることを特徴とする電気二重層キャパシタ。1. An electric double layer capacitor composed of an electrode body composed of a current collector and a polarizable electrode, a separator, and an electrolytic solution, wherein the electrode body is composed of the current collector and the polarizable electrode. An electric double layer capacitor, which is a structure including a graded material composed of a material.
熱硬化性樹脂、分極性電極材料は少なくとも活性炭と熱
硬化性樹脂とを含むことを特徴とする請求項1記載の電
気二重層キャパシタ。2. The electric double layer capacitor according to claim 1, wherein the current collector material contains at least a conductive carbon material and a thermosetting resin, and the polarizable electrode material contains at least activated carbon and a thermosetting resin. ..
を100〜0%、分極性電極材料を同様に0〜100%
含み両面の間で両方の材料組成が段階的または連続的に
変化する傾斜材料を含む構造体である電極体が、一体成
型され、焼結することにより製造されることを特徴とす
る電気二重層キャパシタの製造方法。3. A current collector material of 100% to 0% and a polarizable electrode material of 0% to 100% from one surface to the other surface.
An electric double layer, characterized in that an electrode body, which is a structure containing a gradient material in which both material compositions change stepwise or continuously between both surfaces, is produced by integrally molding and sintering. Method of manufacturing capacitor.
程と、前記積層された集電体と分極性電極の材料を同時
にプレス成形する工程と、前記プレス成形された集電体
と分極性電極の材料を焼結し複合材料電極体を形成する
工程と、前記複合材料電極体に電解液を含浸する工程
と、電解液を含浸した複合材料電極体とセパレータとガ
スケットを用いて電気二重層キャパシタを組み立てる工
程とを有することを特徴とする電気二重層キャパシタの
製造方法。4. A step of laminating a current collector and a material of a polarizable electrode, a step of press-molding the laminated current collector and a material of a polarizable electrode at the same time, and the press-molded current collector. And a step of forming a composite material electrode body by sintering the material of the polarizable electrode, a step of impregnating the composite material electrode body with an electrolytic solution, and using a composite material electrode body impregnated with the electrolytic solution, a separator and a gasket And a step of assembling the electric double layer capacitor.
請求項1記載の電気二重層キャパシタ。5. The electric double layer capacitor according to claim 1, wherein the electrode body has airtightness.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12706192A JP3097305B2 (en) | 1992-05-20 | 1992-05-20 | Electric double layer capacitor and method of manufacturing the same |
US08/064,933 US5381303A (en) | 1992-05-20 | 1993-05-20 | Electric double layer capacitor and method for manufacture thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12706192A JP3097305B2 (en) | 1992-05-20 | 1992-05-20 | Electric double layer capacitor and method of manufacturing the same |
Publications (2)
Publication Number | Publication Date |
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JPH05326326A true JPH05326326A (en) | 1993-12-10 |
JP3097305B2 JP3097305B2 (en) | 2000-10-10 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP12706192A Expired - Fee Related JP3097305B2 (en) | 1992-05-20 | 1992-05-20 | Electric double layer capacitor and method of manufacturing the same |
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JP (1) | JP3097305B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000243658A (en) * | 1999-02-19 | 2000-09-08 | Matsushita Electric Ind Co Ltd | Method and apparatus for manufacturing film, film, film laminated body, and film component |
US6339529B1 (en) * | 1999-06-21 | 2002-01-15 | Nec Corporation | Electric double layer capacitor and method of forming the same |
KR100508321B1 (en) * | 2001-10-19 | 2005-08-17 | 엔이씨 도낀 가부시끼가이샤 | Electric double-layer capacitor and method for preparing the same |
JP2011109115A (en) * | 2003-07-09 | 2011-06-02 | Maxwell Technologies Inc | Dry particle based electrode and electro-chemical device with the same |
US9525168B2 (en) | 2003-07-09 | 2016-12-20 | Maxwell Technologies, Inc. | Dry-particle based adhesive and dry film and methods of making same |
-
1992
- 1992-05-20 JP JP12706192A patent/JP3097305B2/en not_active Expired - Fee Related
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000243658A (en) * | 1999-02-19 | 2000-09-08 | Matsushita Electric Ind Co Ltd | Method and apparatus for manufacturing film, film, film laminated body, and film component |
US6339529B1 (en) * | 1999-06-21 | 2002-01-15 | Nec Corporation | Electric double layer capacitor and method of forming the same |
KR100508321B1 (en) * | 2001-10-19 | 2005-08-17 | 엔이씨 도낀 가부시끼가이샤 | Electric double-layer capacitor and method for preparing the same |
JP2011109115A (en) * | 2003-07-09 | 2011-06-02 | Maxwell Technologies Inc | Dry particle based electrode and electro-chemical device with the same |
US9525168B2 (en) | 2003-07-09 | 2016-12-20 | Maxwell Technologies, Inc. | Dry-particle based adhesive and dry film and methods of making same |
US10547057B2 (en) | 2003-07-09 | 2020-01-28 | Maxwell Technologies, Inc. | Dry-particle based adhesive and dry film and methods of making same |
Also Published As
Publication number | Publication date |
---|---|
JP3097305B2 (en) | 2000-10-10 |
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