JPH0241885B2 - - Google Patents
Info
- Publication number
- JPH0241885B2 JPH0241885B2 JP59091391A JP9139184A JPH0241885B2 JP H0241885 B2 JPH0241885 B2 JP H0241885B2 JP 59091391 A JP59091391 A JP 59091391A JP 9139184 A JP9139184 A JP 9139184A JP H0241885 B2 JPH0241885 B2 JP H0241885B2
- Authority
- JP
- Japan
- Prior art keywords
- carbon
- double layer
- electric double
- current collector
- 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.)
- Expired - Lifetime
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 31
- 229910052799 carbon Inorganic materials 0.000 claims description 25
- 239000003990 capacitor Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000003792 electrolyte Substances 0.000 claims description 5
- 239000010409 thin film Substances 0.000 claims description 4
- 238000007740 vapor deposition Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 239000000284 extract Substances 0.000 claims 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 150000001721 carbon Chemical class 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002491 polymer binding agent Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 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
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
Description
本発明は、活性炭を主体とする分極性カーボン
電極と電解質界面とで形成される電気二重層を利
用した電気二重層キヤパシタに関するものであ
る。
従来より電気二重層キヤパシタにおいては、電
極として活性炭を主体としたカーボン電極を用い
られ、電気を取出す集電体としては、アルミニウ
ム、ステンレス、ニツケルなどの金属が用いられ
それらの接触には有機バインダなどが用いられて
きた。しかし、電極であるカーボンと集電体であ
る金属を有機バインダで接触させた場合、物理的
にも電気的にもその接触は不十分であり、その接
触の不十分さがキヤパシタの製造時に障害となつ
たり、キヤパシタとした場合には特性劣化あるい
はエネルギーの損失につながつていた。
しかるに、本発明は上述の問題点を解決するた
めに、集電体としてその表面にカーボンを蒸着さ
せたものを用いることにより、集電体とカーボン
電極の接触が物理的にも電気的にも強固であり、
かつ性能の向上が期待できる電気二重層キヤパシ
タを提供するものである。
先ず、本発明に係る電気二重層キヤパシタの分
極性電極の製造方法を説明する。集電体金属とし
ては電解質に対して化学的変化を受けないものが
良く、アルミニウム、ステンレス、ニツケル、
鉄、タンタル、チタン、その他の耐蝕性合金など
が好ましく、また板状、箔状、ネツト状、棒状、
繊維状、エキスパンドメタルネツト状、粉体状な
どのものを加圧成形したものがある。さらに、カ
ーボン電極との接触面積を多くするために集電体
金属に表面加工を施して有効表面積を増大したも
のでも良い。このような集電体金属へのカーボン
の蒸着は、例えば真空度10-4〜10-6〔Torr〕、蒸
着速度５〜100〔Å／秒〕で５〜10〔秒〕間行なう。
これにより集電体上に50〜1000〔Å〕厚のカーボ
ンが蒸着される。なお、このカーボン蒸着にあた
り、カーボン粒径が這入込むことのできる微細な
溝が集電体金属の表面にあるのが望ましいが、そ
れがなくても十分にカーボン蒸着は可能である。
上述のようにして形成された集電体はその表面
にカーボンの薄膜が形成されているため、カーボ
ン電極との接触が容易になり、また物理的にも強
固なものとなり、電気二重層キヤパシタとした場
合、従来のものと比較して特性変化が少ないもの
である。さらに、電気的にも従来のものは接触抵
抗があつたのに対して、本発明の集電体は殆ど無
視できる程度の接触抵抗となる。
次に、本発明に係る電気二重層キヤパシタの実
施例を図面と共に説明する。第１図に示すように
表面粗面加工処理を施した100〔μｍ〕厚のステン
レス（SUS316L、18％Cγ、12％Ni、2.5％Mo、
極低炭素型鋼）の板の集電体１にカーボン蒸着に
よつてカーボン薄膜２を形成しておく。これに有
機高分子系の結着剤を混和させた325メツシユパ
スの活性炭と導電性カーボンブラツクの混合物を
加圧焼結させてカーボン電極３を得る。このカー
ボン電極３を絶縁のためのセパレータ４を介して
他方のカーボン電極３と対向させ、集電体１から
はリード５を引出す。次いで、この素子に電解質
を含浸させ、絶縁物の封口体６によつて封口を行
い、電気二重層キヤパシタ７を得た。
ここで、第１表に集電体金属の表面にカーボン
薄膜の蒸着を施した本発明に係る電気二重層キヤ
パシタの特性と従来例であるカーボン薄膜の蒸着
を施さない電気二重層キヤパシタの諸特性の比較
を示す。
The present invention relates to an electric double layer capacitor that utilizes an electric double layer formed by a polarizable carbon electrode mainly composed of activated carbon and an electrolyte interface. Conventionally, in electric double layer capacitors, carbon electrodes mainly made of activated carbon have been used as electrodes, and metals such as aluminum, stainless steel, and nickel have been used as current collectors to extract electricity, and organic binders etc. have been used for contact between them. has been used. However, when carbon, which is an electrode, and metal, which is a current collector, are brought into contact with an organic binder, the contact is insufficient both physically and electrically, and this insufficient contact causes problems when manufacturing capacitors. If it becomes a capacitor or becomes a capacitor, it leads to characteristic deterioration or energy loss. However, in order to solve the above-mentioned problems, the present invention uses a current collector with carbon deposited on its surface so that the contact between the current collector and the carbon electrode can be maintained both physically and electrically. It is strong and
The present invention also provides an electric double layer capacitor that can be expected to have improved performance. First, a method for manufacturing a polarizable electrode for an electric double layer capacitor according to the present invention will be explained. The current collector metal should preferably be one that does not undergo chemical changes due to the electrolyte, such as aluminum, stainless steel, nickel, etc.
Iron, tantalum, titanium, and other corrosion-resistant alloys are preferable, and plate-shaped, foil-shaped, net-shaped, rod-shaped,
There are products that are pressure-molded in the form of fibers, expanded metal nets, powders, etc. Furthermore, in order to increase the contact area with the carbon electrode, the current collector metal may be surface-treated to increase the effective surface area. Such vapor deposition of carbon onto the current collector metal is carried out, for example, at a vacuum degree of 10 -4 to 10 -6 [Torr] and a vapor deposition rate of 5 to 100 [Å/sec] for 5 to 10 [seconds].
As a result, carbon with a thickness of 50 to 1000 Å is deposited on the current collector. In this carbon deposition, it is desirable that there be fine grooves on the surface of the current collector metal into which the carbon particles can penetrate, but carbon deposition can be carried out satisfactorily even without such grooves. Since the current collector formed as described above has a thin carbon film formed on its surface, it can easily come into contact with the carbon electrode and is also physically strong, making it suitable for use as an electric double layer capacitor. In this case, there are fewer changes in characteristics compared to conventional ones. Furthermore, electrically, while the conventional one had contact resistance, the current collector of the present invention has almost negligible contact resistance. Next, examples of the electric double layer capacitor according to the present invention will be described with reference to the drawings. As shown in Figure 1, 100 [μm] thick stainless steel (SUS316L, 18%Cγ, 12%Ni, 2.5%Mo,
A thin carbon film 2 is formed on a current collector 1 made of a plate of ultra-low carbon type steel by carbon vapor deposition. A mixture of 325 mesh pass activated carbon and conductive carbon black mixed with an organic polymer binder is pressurized and sintered to obtain the carbon electrode 3. This carbon electrode 3 is opposed to the other carbon electrode 3 via a separator 4 for insulation, and a lead 5 is drawn out from the current collector 1. Next, this element was impregnated with an electrolyte and sealed with an insulating sealant 6 to obtain an electric double layer capacitor 7. Here, Table 1 shows the characteristics of the electric double layer capacitor according to the present invention in which a carbon thin film is deposited on the surface of the current collector metal, and the characteristics of the conventional electric double layer capacitor in which a carbon thin film is not deposited. A comparison is shown.
【表】
第１表からも分かるように、本発明においては
従来例と比較して内部抵抗および漏れ電流ともに
大幅に改善された電気二重層キヤパシタを提供で
きるものである。[Table] As can be seen from Table 1, the present invention can provide an electric double layer capacitor with significantly improved internal resistance and leakage current compared to the conventional example.
第１図は本発明に係る電気二重層キヤパシタを
示す断面図である。図中、１……集電体、２……
カーボン薄膜、３……カーボン電極、４……電解
質を含んだセパレータ、５……リード、６……封
口体、７……電気二重層キヤパシタ。
FIG. 1 is a sectional view showing an electric double layer capacitor according to the present invention. In the figure, 1... current collector, 2...
Carbon thin film, 3... carbon electrode, 4... separator containing electrolyte, 5... lead, 6... sealing body, 7... electric double layer capacitor.
Claims (1)
と電解質界面とで形成される電気二重層を利用し
た電気二重層キヤパシタにおいて、前記カーボン
電極と接触して電気を取出す集電体として同集電
体金属の表面にカーボン薄膜を蒸着手段により形
成したものを用いることを特徴とした電気二重層
キヤパシタ。1. In an electric double layer capacitor that utilizes an electric double layer formed by a polarizable carbon electrode mainly made of activated carbon or the like and an electrolyte interface, the same current collector metal is used as a current collector that contacts the carbon electrode and extracts electricity. An electric double layer capacitor characterized in that a carbon thin film is formed on the surface of the capacitor by vapor deposition means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59091391A JPS60235419A (en) | 1984-05-08 | 1984-05-08 | Electric double layer capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59091391A JPS60235419A (en) | 1984-05-08 | 1984-05-08 | Electric double layer capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60235419A JPS60235419A (en) | 1985-11-22 |
| JPH0241885B2 true JPH0241885B2 (en) | 1990-09-19 |
Family
ID=14025075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59091391A Granted JPS60235419A (en) | 1984-05-08 | 1984-05-08 | Electric double layer capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60235419A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0666234B2 (en) * | 1985-03-07 | 1994-08-24 | 松下電器産業株式会社 | Electric double layer capacitor |
| JPH0666229B2 (en) * | 1989-08-30 | 1994-08-24 | いすゞ自動車株式会社 | Electric double layer capacitor |
| JPH04142017A (en) * | 1990-10-02 | 1992-05-15 | Osaka Titanium Co Ltd | Electric double-layred battery |
| JP3244691B2 (en) * | 1990-10-18 | 2002-01-07 | 旭硝子株式会社 | Electric double layer capacitor |
| JP3003712B2 (en) * | 1991-02-21 | 2000-01-31 | 重雄 山本 | Electric double layer battery |
| JPH05174870A (en) * | 1991-12-25 | 1993-07-13 | Osaka Titanium Co Ltd | Electric double-layer battery |
| US6493210B2 (en) | 1998-01-23 | 2002-12-10 | Matsushita Electric Industrial Co., Ltd. | Electrode metal material, capacitor and battery formed of the material and method of producing the material and the capacitor and battery |
| EP0989571B1 (en) * | 1998-01-23 | 2007-04-11 | Matsushita Electric Industrial Co., Ltd. | Metal electrode material, capacitor using metal electrode material, and method of manufacture |
| JPWO2005006469A1 (en) * | 2003-07-15 | 2007-09-20 | 伊藤忠商事株式会社 | Current collecting structure and electrode structure |
-
1984
- 1984-05-08 JP JP59091391A patent/JPS60235419A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60235419A (en) | 1985-11-22 |
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