JPH02251124A - Electric double-layer capacitor - Google Patents
Electric double-layer capacitorInfo
- Publication number
- JPH02251124A JPH02251124A JP1073430A JP7343089A JPH02251124A JP H02251124 A JPH02251124 A JP H02251124A JP 1073430 A JP1073430 A JP 1073430A JP 7343089 A JP7343089 A JP 7343089A JP H02251124 A JPH02251124 A JP H02251124A
- Authority
- JP
- Japan
- Prior art keywords
- carbonic acid
- electric double
- polarizable electrode
- esr
- 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 title claims description 13
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000003960 organic solvent Substances 0.000 claims abstract description 6
- 239000003792 electrolyte Substances 0.000 claims abstract description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 13
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 13
- 239000003463 adsorbent Substances 0.000 claims description 9
- 230000006866 deterioration Effects 0.000 abstract description 5
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 abstract description 4
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- 239000004809 Teflon Substances 0.000 abstract description 2
- 229920006362 Teflon® Polymers 0.000 abstract description 2
- 239000011230 binding agent Substances 0.000 abstract description 2
- 239000006229 carbon black Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 235000011089 carbon dioxide Nutrition 0.000 abstract 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 abstract 3
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 239000006096 absorbing agent Substances 0.000 abstract 1
- 239000008151 electrolyte solution Substances 0.000 description 3
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Chemical compound [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 description 2
- FRWYFWZENXDZMU-UHFFFAOYSA-N 2-iodoquinoline Chemical compound C1=CC=CC2=NC(I)=CC=C21 FRWYFWZENXDZMU-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- LTPBRCUWZOMYOC-UHFFFAOYSA-N beryllium oxide Inorganic materials O=[Be] LTPBRCUWZOMYOC-UHFFFAOYSA-N 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- UPOHIXYDQZCJLR-UHFFFAOYSA-J tetraethylazanium tetrafluoride Chemical compound C(C)[N+](CC)(CC)CC.[F-].[F-].[F-].[F-].C(C)[N+](CC)(CC)CC.C(C)[N+](CC)(CC)CC.C(C)[N+](CC)(CC)CC UPOHIXYDQZCJLR-UHFFFAOYSA-J 0.000 description 1
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は電気二重層コンデンサに関する。[Detailed description of the invention] (Industrial application field) The present invention relates to an electric double layer capacitor.
（従来の技術）
電気二重層コンデンサは、停電時のコンピュータのバン
クアップ電源やソーラ時計の電池、モータ駆動用の電源
として用（＼られる。(Prior Art) Electric double layer capacitors are used as bank-up power sources for computers during power outages, batteries for solar clocks, and power sources for motor drives.
この電気二重Ｎコンデンサは、例えば、分極性電極をセ
パレータで分離した素子に、有機溶媒系等の電解液を含
浸し、これをケースに収納する機成となっている。This electric double N capacitor has a structure in which, for example, an element in which polarizable electrodes are separated by a separator is impregnated with an electrolytic solution such as an organic solvent, and this is housed in a case.
（発明が解決しようとする課題）
しかしプロピレンカーボネート等の有機溶媒を用いた電
解液は、２Ｖ程度以上の電圧を印加すると、電気化学的
な分解反応により炭酸ガスを発生する。そのために、ケ
ース内の圧力が上昇して密閉不良となる恐れを生じる欠
点がある。また等価直列抵抗（以下ＥＳＲという）等の
特性が劣化する欠点がある。(Problems to be Solved by the Invention) However, when a voltage of about 2 V or more is applied to an electrolytic solution using an organic solvent such as propylene carbonate, carbon dioxide gas is generated due to an electrochemical decomposition reaction. Therefore, there is a drawback that the pressure inside the case increases and there is a possibility that the sealing will be insufficient. Furthermore, there is a drawback that characteristics such as equivalent series resistance (hereinafter referred to as ESR) deteriorate.
本発明の目的は、以上の欠点を改良し、ＥＳＲ等の特性
を向上しうる電気二重層コンデンサを提供するものであ
る。An object of the present invention is to provide an electric double layer capacitor which can improve the above-mentioned drawbacks and improve characteristics such as ESR.
（課題を解決するための手段）
本発明は、上記の目的を達成するために、分極性電極を
セパレータで分離したコンデンサ素子に有機溶媒系の電
解液を含浸した電気二重層コンデンサにおいて、分極性
電極に炭酸ガス吸着剤を添加することを特徴とする電気
二重層コンデンサを提供するものである。(Means for Solving the Problems) In order to achieve the above object, the present invention provides an electric double layer capacitor in which a capacitor element in which polarizable electrodes are separated by a separator is impregnated with an organic solvent-based electrolyte. The present invention provides an electric double layer capacitor characterized in that a carbon dioxide adsorbent is added to the electrodes.
（作用）
プロピレンカーボネート等の有機溶媒が電気化学的に分
解反応し炭酸ガスを発生しても、この炭酸ガスは炭酸ガ
ス吸着剤により吸収される。従って、ケース内のガス圧
の上昇を防止でき、それにともなう密閉不良やＥＳＲ等
の特性劣化を防止できる。(Function) Even if an organic solvent such as propylene carbonate undergoes an electrochemical decomposition reaction and generates carbon dioxide gas, this carbon dioxide gas is absorbed by the carbon dioxide adsorbent. Therefore, it is possible to prevent the gas pressure within the case from increasing, and the resulting sealing failure and characteristic deterioration such as ESR can be prevented.
（実施例） 以下、本発明を実施例に基づいて説明する。(Example) Hereinafter, the present invention will be explained based on examples.
第１図において、１は、分極性電極であり、カーボンブ
ラックを主成分とし、これに炭酸ガス吸着剤を１〜３０
％、テフロン系バインダーを約２５％添加した材料から
なり、厚さ５００μｍ、直径１４ｍｍの円形状に形成さ
れている。炭酸ガス吸着剤としては酸化カルシウムや酸
イしマグネシウム、酸化ベリリウム、酸化ストロンチウ
ム、酸化バリウ′ム等を用いる。この分極性電極１には
、プロピレンカーボネートを溶媒とし、溶質として四フ
ッ化テトラエチルアンモニウムを１モル／、Ｉｌ添加し
た電解液を１７５μ」含浸している。２は、分極性電極
１を分離するセパレータであり、厚さ２５μｍ１直径１
７ｍｔｎの円形状のポリプロピレン製の多孔質フィルム
からなる。３は、厚さ１．６ｍｍ。In FIG. 1, 1 is a polarizable electrode, which has carbon black as its main component and a carbon dioxide adsorbent of 1 to 30%.
%, and is made of a material to which about 25% of Teflon binder is added, and is formed into a circular shape with a thickness of 500 μm and a diameter of 14 mm. As the carbon dioxide adsorbent, calcium oxide, magnesium oxide, beryllium oxide, strontium oxide, barium oxide, etc. are used. This polarizable electrode 1 is impregnated with 175 microns of an electrolytic solution containing propylene carbonate as a solvent and 1 mol/Il of tetraethylammonium tetrafluoride added as a solute. 2 is a separator that separates the polarizable electrode 1, and has a thickness of 25 μm and a diameter of 1.
It consists of a 7 mtn circular porous film made of polypropylene. 3 has a thickness of 1.6 mm.
直径２−０ｍｍのステンレス製のコイン形のケースであ
り、分極性電極１をセパレータ２で分離したコンデンサ
素子４を収納するものである。It is a coin-shaped stainless steel case with a diameter of 2 to 0 mm, and houses a capacitor element 4 in which a polarizable electrode 1 is separated by a separator 2.
次に、上記実施例と従来例について、電圧を２■印加し
、温度８５°Ｃの雰囲気中に放置し、静電容量変化率、
ＥＳＲ変化率、漏れ電流を測定したところ第２図〜第４
図の通りの結果が青られた。Next, for the above embodiment and conventional example, a voltage of 2 cm was applied and the capacitance change rate was
Measurements of ESR change rate and leakage current are shown in Figures 2 to 4.
The results shown in the figure are shown in blue.
なお、実施例の炭酸ガス吸着剤の秤類、その添ｊＪｌ量
は表の通りとする。従来例）よ炭酸ガス吸着剤を含まな
い分極性電極を用いたものどザる。In addition, the scales of the carbon dioxide adsorbent in the examples and the amount of added jJl are as shown in the table. Conventional example) A method using a polarizable electrode that does not contain a carbon dioxide adsorbent fails.
尤
第２図から明らかな通り、静電容量変化率は放置時間１
５００１（ｒ後、実施例１〜実施例７は一１６％〜−２
８％であるのに対して従来例は一４０％となり、前者の
方が後者に比べて低くなっている。As is clear from Figure 2, the rate of change in capacitance increases with standing time 1.
5001 (after r, Examples 1 to 7 are -16% to -2
While it is 8%, it is 40% in the conventional example, which is lower in the former than in the latter.
また、第３図から明らかな通り、ＥＳＲ変化率は、放置
時間１５００Ｈｒ後、実施例１〜実施例７が１，２５倍
〜２倍、従来例が３倍となり、前者の方が後者の２／３
以下におさえられている。Furthermore, as is clear from Fig. 3, the ESR change rate was 1.25 to 2 times higher for Examples 1 to 7 and 3 times higher for the conventional example after a standing time of 1500 hours, with the former being 2 times higher than the latter. /3
It is contained below.
さらに、第４図から明らかな通り、漏れ電流は、放置時
間１５００１打後、実施例１〜実施例７が２０μ八〜６
０μＡ１従来例が１４０μ△で、前者は後者に比べて３
／７以下となる。Furthermore, as is clear from FIG. 4, the leakage current was 20 μ8 to 6 in Examples 1 to 7 after a standing time of 15,001 strokes.
0μA1 conventional example is 140μ△, the former is 3
/7 or less.
なお、炭酸ガス吸着剤の添加量が３０％を越えるとシー
１〜成形が困難になるので、３０％以下が好ましい。Note that if the amount of carbon dioxide adsorbent added exceeds 30%, it will become difficult to form a sheet, so it is preferably 30% or less.
（発明の効果）
以上の通り、本発明によれば、分極性電極中に炭酸ガス
吸着剤を添加してりるために、電解液から発生した炭酸
ガスにより劣化するのを軽減でき、ＥＳＲ等の特性を向
上しうる電気二重層コンデンサが得られる。(Effects of the Invention) As described above, according to the present invention, since a carbon dioxide adsorbent is added to the polarizable electrode, deterioration due to carbon dioxide gas generated from the electrolyte can be reduced, and ESR etc. An electric double layer capacitor with improved characteristics can be obtained.
第１図は本発明の実施例の正面断面図、第２図〜第４図
は放置劣化のグラフを示し、第２図は静電容量変化率、
第３図は等価直列抵抗変化率、第４図は漏れ電流のグラ
フを示す。
１・・・分極性電極、 ２・・・セパレータ。
特許出願人 日立コンデンサ株式会社
咽を―塘【
−０Ｊｒｖ″１寸ゼγＯ
本専１午みみ４呟
マー！賃−＼−”豐°！−
缶一匣［１１１８３−１夜υ鞭買Fig. 1 is a front sectional view of an embodiment of the present invention, Figs. 2 to 4 show graphs of deterioration due to storage, and Fig. 2 shows the capacitance change rate,
FIG. 3 shows a graph of equivalent series resistance change rate, and FIG. 4 shows a graph of leakage current. 1... Polarizable electrode, 2... Separator. Patent Applicant: Hitachi Capacitor Co., Ltd. -Tang [-0Jrv"1 size γO Honsen 1 noon ear 4 mutter! Rent-\-"豐°! - Buy a can [11183-1 night whip]
Claims (1)
子に有機溶媒系の電解液を含浸した電気二重層コンデン
サにおいて、分極性電極に炭酸ガス吸着剤を添加するこ
とを特徴とする電気二重層コンデンサ。(1) An electric double layer capacitor in which a capacitor element in which polarizable electrodes are separated by a separator is impregnated with an organic solvent-based electrolyte, and the electric double layer capacitor is characterized in that a carbon dioxide adsorbent is added to the polarizable electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1073430A JPH02251124A (en) | 1989-03-24 | 1989-03-24 | Electric double-layer capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1073430A JPH02251124A (en) | 1989-03-24 | 1989-03-24 | Electric double-layer capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02251124A true JPH02251124A (en) | 1990-10-08 |
Family
ID=13518023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1073430A Pending JPH02251124A (en) | 1989-03-24 | 1989-03-24 | Electric double-layer capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02251124A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5781403A (en) * | 1909-07-30 | 1998-07-14 | Nec Corporation | Electric double layer capacitor having hydrophobic powdery activated charcoal |
| JP2006261516A (en) * | 2005-03-18 | 2006-09-28 | Honda Motor Co Ltd | Electric double layer capacitor |
| JP2009516916A (en) * | 2005-11-22 | 2009-04-23 | マックスウェル テクノロジーズ， インク | Ultracapacitor pressure control system |
-
1989
- 1989-03-24 JP JP1073430A patent/JPH02251124A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5781403A (en) * | 1909-07-30 | 1998-07-14 | Nec Corporation | Electric double layer capacitor having hydrophobic powdery activated charcoal |
| JP2006261516A (en) * | 2005-03-18 | 2006-09-28 | Honda Motor Co Ltd | Electric double layer capacitor |
| JP4597727B2 (en) * | 2005-03-18 | 2010-12-15 | 本田技研工業株式会社 | Electric double layer capacitor |
| JP2009516916A (en) * | 2005-11-22 | 2009-04-23 | マックスウェル テクノロジーズ， インク | Ultracapacitor pressure control system |
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