JP2003297699A - Electric double-layer capacitor - Google Patents
Electric double-layer capacitorInfo
- Publication number
- JP2003297699A JP2003297699A JP2002095713A JP2002095713A JP2003297699A JP 2003297699 A JP2003297699 A JP 2003297699A JP 2002095713 A JP2002095713 A JP 2002095713A JP 2002095713 A JP2002095713 A JP 2002095713A JP 2003297699 A JP2003297699 A JP 2003297699A
- Authority
- JP
- Japan
- Prior art keywords
- electric double
- layer capacitor
- double layer
- zro
- gas
- 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.)
- Withdrawn
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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電気二重層キャパ
シタに関わり、特に経時変化による特性劣化が抑制され
たもの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, and more particularly to an electric double layer capacitor in which characteristic deterioration due to aging is suppressed.
【０００２】[0002]
【従来の技術】電気二重層キャパシタは、電荷を有する
固体とそれに接触する電解液の界面に形成される、厚さ
数ｎｍ程度の電気二重層を、誘電体として利用したもの
である。電気二重層の容量は、１ｃｍ２あたり数十μＦ
であるが、表面積が数千ｍ２にも及ぶ活性炭を電極とし
て用いることにより、数百〜数千Ｆの極めて大きな容量
を得ることが可能である。2. Description of the Related Art An electric double layer capacitor uses, as a dielectric, an electric double layer having a thickness of about several nanometers, which is formed at the interface between a charged solid and an electrolytic solution in contact with the solid. The capacity of the electric double layer is several tens of μF per cm 2.
However, it is possible to obtain an extremely large capacity of several hundred to several thousand F by using activated carbon having a surface area of several thousand m 2 as an electrode.
【０００３】そして、電気二重層キャパシタには、下記
のように電池とコンデンサの中間のような特徴を有し、
実用に供されるとともに、さらなる性能向上のための検
討がなされている。
（１）充放電サイクルに伴う容量の劣化が少ない。
（２）一般的な電池に比較して、起動後に瞬時に大きな
出力を取り出せる。The electric double layer capacitor has the following characteristics between a battery and a capacitor,
While being put to practical use, studies are being made to further improve performance. (1) There is little deterioration in capacity due to charge / discharge cycles. (2) A large output can be taken out instantly after starting as compared with a general battery.
【０００４】電気二重層キャパシタの小型のものは、主
にそれぞれ集電体層をもつ一対の分極性電極の間に、ポ
リプロピレン不織布などのセパレータを挟んで素子と
し、この素子に電解液を含浸させ、金属容器に収容し、
封口板とガスケットにより金属容器に密封したコイン型
の構造をとっている。A small-sized electric double layer capacitor is mainly composed of a pair of polarizable electrodes each having a collector layer, and a separator such as polypropylene nonwoven fabric is sandwiched between them to form an element, which is impregnated with an electrolytic solution. , Housed in a metal container,
It has a coin-type structure in which a metal container is sealed by a sealing plate and a gasket.
【０００５】この他にも比較的大容量のものは、一対の
シート状分極性電極の間にセパレータを挟んだ積層シー
トを巻き回して素子とし、この素子に電解液を含浸さ
せ、金属容器に収容し、金属開口部を封口部材で密閉し
て構成した、巻回型のキャパシタが製造されている。こ
れらの電気二重層キャパシタは、電池と電解コンデンサ
の中間の特性を有し、おもにＩＣメモリのバックアップ
やアクチュエーターのバックアップに便用されている。
また、大電流大容量向けとして、多数のシート状分極性
電極層の間にセパレータを挟んで積層した素子を有する
積層型の電気二重層キャパシタも製造されている。In addition to this, in the case of a relatively large capacity, a laminated sheet in which a separator is sandwiched between a pair of sheet-like polarizable electrodes is wound to form an element, and this element is impregnated with an electrolytic solution to form a metal container. A wound-type capacitor is manufactured that is housed and sealed by sealing a metal opening with a sealing member. These electric double layer capacitors have intermediate characteristics between batteries and electrolytic capacitors, and are mainly used for backing up IC memories and actuators.
In addition, for a large current and a large capacity, a laminated electric double layer capacitor having an element in which a separator is sandwiched between a large number of sheet-shaped polarizable electrode layers is also manufactured.
【０００６】[0006]
【発明が解決しようとする課題】従来の方法で作製され
たキャパシタ素子で問題となるのは、電解液中の極微量
の水などの不純物、活性炭の表面官能基と電解液との反
応などにより、充放電中に水素や二酸化炭素などのガス
が発生し、内圧が上昇することである。これにより、内
部抵抗の上昇や静電容量の低下などが起こる。これにつ
いては、金属ケース内にガス吸着層を設けるなどの対策
が提案されている。A problem with the capacitor element manufactured by the conventional method is that impurities such as trace amounts of water in the electrolytic solution and the reaction between the surface functional groups of activated carbon and the electrolytic solution cause problems. During charging and discharging, gases such as hydrogen and carbon dioxide are generated and the internal pressure rises. This causes an increase in internal resistance and a decrease in capacitance. Regarding this, measures such as providing a gas adsorption layer in a metal case have been proposed.
【０００７】しかしながら、前記ガス吸収層は、アルカ
リ金属やアルカリ土類金属の水酸化物、特に水酸化リチ
ウムを使用するもので、取り扱い、ひいては製造工程の
簡略化のために、前記とは別の物質を、ガス吸収層とし
て用いる技術の開発が望まれていた。従って、本発明の
技術的な課題は、ガス発生による特性劣化を、従来とは
別の方法で抑制する電気二重層キャパシタを提供するこ
とにある。However, the gas absorption layer uses a hydroxide of an alkali metal or an alkaline earth metal, especially lithium hydroxide, and is different from the above for the sake of simplification of the handling and the manufacturing process. It has been desired to develop a technique of using a substance as a gas absorption layer. Therefore, a technical object of the present invention is to provide an electric double layer capacitor which suppresses characteristic deterioration due to gas generation by a method different from the conventional one.
【０００８】[0008]
【課題を解決するための手段】本発明は、前記の問題点
を解決するために、ガス吸収層として有用な材料を、種
々検討した結果なされたものである。The present invention has been made as a result of various studies on materials useful as a gas absorption layer in order to solve the above problems.
【０００９】即ち、本発明は、一対の集電体上に形成さ
れた分極性電極と、その分極性電極間にセパレータを介
在させ、電解液を含浸させて外装ケースに収めた電気二
重層キャパシタにおいて、前記外装ケース内部にガス吸
収材料を含むことを特徴とする電気二重層キャパシタで
ある。That is, according to the present invention, an electric double layer capacitor having a polarizable electrode formed on a pair of current collectors and a separator interposed between the polarizable electrodes, impregnated with an electrolytic solution and housed in an outer case. 2. In the electric double layer capacitor, wherein the exterior case contains a gas absorbing material.
【００１０】また、本発明は、前記の電気二重層キャパ
シタにおいて、前記ガス吸収材料は、リチウム複合酸化
物、ゼオライトの少なくともいずれかを含むことを特徴
とする電気二重層キャパシタである。The present invention is also the electric double layer capacitor, wherein the gas absorbing material contains at least one of a lithium composite oxide and zeolite.
【００１１】また、本発明は、前記の電気二重層キャパ
シタにおいて、リチウム複合酸化物が、Ｌｉ2ＺｒＯ3、
ＬｉＦｅＯ2、ＬｉＮｉＯ2、Ｌｉ2ＴｉＯ3、Ｌｉ2Ｓｉ
Ｏ3、Ｌｉ4ＳｉＯ4から選ばれる少なくとも１種である
ことを特徴とする電気二重層キャパシタである。In the electric double layer capacitor according to the present invention, the lithium composite oxide is Li 2 ZrO 3 ,
LiFeO 2 , LiNiO 2 , Li 2 TiO 3 , Li 2 Si
It is an electric double layer capacitor characterized by being at least one selected from O 3 and Li 4 SiO 4 .
【００１２】[0012]
【作用】次のような可逆的な反応で、二酸化炭素を低温
で吸収し高温で放出するセラミックスとして、たとえば
Ｌｉ2ＺｒＯ3（ジルコン酸リチウム）に代表される、複
合酸化物が見出され注目されている。
Ｌｉ2ＺｒＯ3＋ＣＯ2←→ＺｒＯ2＋Ｌｉ2ＣＯ3 As a ceramic that absorbs carbon dioxide at a low temperature and releases it at a high temperature in the following reversible reaction, a complex oxide represented by, for example, Li 2 ZrO 3 (lithium zirconate) has been found. Has been done. Li 2 ZrO 3 + CO 2 ← → ZrO 2 + Li 2 CO 3
【００１３】これは、反応の自由エネルギー変化：ΔＧ
が、温度と二酸化炭素の分圧に依存することによるもの
であり、このような反応を起こすリチウム複合酸化物と
して、前記Ｌｉ2ＺｒＯ3の他に、ＬｉＦｅＯ2、ＬｉＮ
ｉＯ2、Ｌｉ2ＴｉＯ3、Ｌｉ2ＳｉＯ3、Ｌｉ4ＳｉＯ4な
どが挙げられる。This is the change in free energy of reaction: ΔG
Is dependent on the temperature and the partial pressure of carbon dioxide, and as a lithium composite oxide that causes such a reaction, LiFeO 2 , LiN 2 other than Li 2 ZrO 3 described above is used.
Examples thereof include iO 2 , Li 2 TiO 3 , Li 2 SiO 3 , and Li 4 SiO 4 .
【００１４】また、多孔質で比表面積が大きい天然の鉱
物にゼオライトがある。ゼオライトは、珪酸アルミナ含
水塩鉱物であり、その比表面積は、およそ３５０ｍ２／
ｇにも達し、開放孔に収容可能なサイズのイオンやガス
を吸着、放出する機能を有する。従って、これらの材料
を電気二重層キャパシタのケース内に封入することで、
ガス吸収層として用いることにより、分極性電極からの
ガス発生に起因する特性劣化を抑制し得る。Zeolite is a natural mineral that is porous and has a large specific surface area. Zeolite is a silicate alumina hydrate salt mineral, and its specific surface area is about 350 m 2 /
It has a function of adsorbing and releasing ions and gas having a size that can reach g and can be accommodated in the open hole. Therefore, by encapsulating these materials in the case of the electric double layer capacitor,
By using it as the gas absorption layer, it is possible to suppress the characteristic deterioration due to the gas generation from the polarizable electrode.
【００１５】[0015]
【発明の実施の形態】次に、本発明の実施の形態につい
て説明する。BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described.
【００１６】まず、本発明の電気二重層キャパシタに用
いる分極性電極は、特に限定されるものではなく、従来
より周知あるいは公知のものが種々採用可能である。た
とえば、比表面積の大きな活性炭繊維布、活性炭粉末な
どが使用可能である。特に、活性炭粉末にカーボンブラ
ックなどの導電材およびポリテトラフルオロエチレンな
どのバインダにアルコールを加えて混練し、ロール成形
してシート化した分極性電極は、単位体積当りの容量、
強度に優れているので好ましく使用される。First, the polarizable electrode used in the electric double layer capacitor of the present invention is not particularly limited, and various well-known or publicly known electrodes can be adopted. For example, activated carbon fiber cloth or activated carbon powder having a large specific surface area can be used. In particular, a polarizable electrode formed by adding alcohol to a conductive material such as carbon black and a binder such as polytetrafluoroethylene in an activated carbon powder, kneading, and roll-forming into a sheet has a capacity per unit volume,
It is preferably used because it has excellent strength.
【００１７】分極性電極に使用される活性炭としては、
フェノール樹脂系活性炭、やしがら系活性炭、石油コー
クス系活性炭などがあるが、大容量の電気二重層キャパ
シタが得られ、かつ純度が高いことからフェノール樹脂
系活性炭が好ましく用いられる。また、活性炭として
は、大容量で低内部抵抗の電気二重層キャパシタが得ら
れるように、粉末の場合は平均粒径が２０μｍ以下、繊
維状の場合は繊維径１０〜２０μｍで、ともに比表面積
が１０００〜３０００ｍ２／ｇの活性炭を使用するのが
好ましい。As the activated carbon used for the polarizable electrode,
Phenolic resin-based activated carbon, coconut husk-based activated carbon, petroleum coke-based activated carbon and the like are available. Phenolic resin-based activated carbon is preferably used because a large capacity electric double layer capacitor can be obtained and the purity is high. Further, as activated carbon, in order to obtain an electric double layer capacitor having a large capacity and a low internal resistance, powder has an average particle diameter of 20 μm or less, and fibrous has a fiber diameter of 10 to 20 μm and both have a specific surface area. It is preferable to use 1000 to 3000 m 2 / g of activated carbon.
【００１８】分極性電極のバインダには、有機溶媒系電
解液を使用する場合に、耐薬品性が大きいため、ポリテ
トラフルオロエチレン系バインダが好ましく使用され
る。本発明で用いられる電解液としては、特に限定はさ
れるものではなく、電気二重層キャパシタ用として通常
用いられるもの、すなわち電気化学的に安定な電解質を
極性有機溶媒に溶解させたものが適宜使用される。As a binder for the polarizable electrode, a polytetrafluoroethylene-based binder is preferably used because it has high chemical resistance when an organic solvent-based electrolyte is used. The electrolytic solution used in the present invention is not particularly limited, and those usually used for electric double layer capacitors, that is, those prepared by dissolving an electrochemically stable electrolyte in a polar organic solvent are appropriately used. To be done.
【００１９】具体的に、電解質としては、（Ｃ2Ｈ5）4
Ｎ+や（Ｃ3Ｈ7）4Ｎ+、（Ｃ4Ｈ9）4Ｎ+、（Ｃ2Ｈ5）3Ｃ
Ｈ3Ｎ+、（Ｃ2Ｈ5）4Ｐ+などの第４級オニウムカチオン
と、ＢＦ4 -やＰＦ6 -、ＣｌＯ4 -、ＣＦ3ＳＯ3 -などのア
ニオンとからなる塩が好ましく使用できる。Specifically, as the electrolyte, (C 2 H 5 ) 4
N + and (C 3 H 7 ) 4 N + , (C 4 H 9 ) 4 N + , (C 2 H 5 ) 3 C
A salt composed of a quaternary onium cation such as H 3 N + and (C 2 H 5 ) 4 P + and an anion such as BF 4 − , PF 6 − , ClO 4 − and CF 3 SO 3 − is preferably used. it can.
【００２０】また、上記有機溶媒としては、プロピレン
カーボネート、ブチレンカーボネート、ジエチルカーボ
ネート、エチレンカーボネートなどのカーボネート類、
γ−ブチロラクトンなどのラクトン類、スルホラン、ジ
メチルスルホキシド、アセトニトリル、Ｎ、Ｎ−ジメチ
ルホルムアミドなどが好ましく使用できる。そして、電
解質及び溶媒は、二種以上、併用してもよい。Further, as the organic solvent, carbonates such as propylene carbonate, butylene carbonate, diethyl carbonate and ethylene carbonate,
Lactones such as γ-butyrolactone, sulfolane, dimethyl sulfoxide, acetonitrile, N, N-dimethylformamide and the like can be preferably used. And two or more types of electrolytes and solvents may be used in combination.
【００２１】また、ガス吸収層に用いられる材料として
は、前記のリチウム複合酸化物やゼオライトの他に、活
性炭などの吸着材料や、ＬｉＯＨに代表されるアルカリ
金属、アルカリ土類金属の水酸化物などを併用してもよ
い。As the material used for the gas absorption layer, in addition to the above-mentioned lithium composite oxide and zeolite, an adsorbent material such as activated carbon, or an alkali metal or alkaline earth metal hydroxide represented by LiOH. You may use together.
【００２２】[0022]
【実施例】次に、具体的な例を挙げ、本発明の実施例を
詳しく説明する。EXAMPLES Next, examples of the present invention will be described in detail by giving concrete examples.
【００２３】（実施例１）図１は、巻回型の電気二重層
キャパシタにおける、巻回素子の構成を示した斜視図で
ある。ここでは、まず比表面積１５００ｍ２／ｇのフェ
ノール系活性炭とカーボンブラックを、重量比８：１の
割合で混合し、この混合粉末にバインダとしてＮ−メチ
ルピロリドンに溶解したポリフッ化ビニリデンを加えて
混練し、スラリー状にした。(Embodiment 1) FIG. 1 is a perspective view showing a structure of a winding element in a winding type electric double layer capacitor. Here, first, phenol-based activated carbon having a specific surface area of 1500 m 2 / g and carbon black are mixed at a weight ratio of 8: 1, and polyvinylidene fluoride dissolved in N-methylpyrrolidone as a binder is added to the mixed powder and kneaded. And made into a slurry.
【００２４】次いで、２５μｍ厚のアルミニウム箔から
なる、正極側の集電体１３、負極側の集電体１５にスラ
リーを均一に塗布し、乾燥後、集電体が変形しない程度
に圧延を行い、厚さ７０μｍの正極側の分極性電極１
２、負極側の分極性電極１４を得た。Next, the slurry is uniformly applied to the current collector 13 on the positive electrode side and the current collector 15 on the negative electrode side which are made of an aluminum foil having a thickness of 25 μm, and after drying, rolling is performed to such an extent that the current collector does not deform. , 70 μm thick polarizable electrode 1 on the positive electrode side
2, the polarizable electrode 14 on the negative electrode side was obtained.
【００２５】得られた正極側及び負極側の集電体に、ア
ルミニウムのリード端子１６をかしめにより接続した。
次いで、一対の集電体と分極性電極の間に、厚さが２５
μｍのポリプロピレン不織布からなるセパレータ１１を
配置し、渦巻き状に所定の径になるまで巻き取ることで
巻回素子を作製した。Aluminum lead terminals 16 were connected by caulking to the obtained positive and negative electrode side current collectors.
Then, between the pair of current collectors and the polarizable electrode, a thickness of 25
A winding element was produced by arranging a separator 11 made of a polypropylene non-woven fabric of μm and winding it in a spiral shape until it had a predetermined diameter.
【００２６】図２は、巻回素子をケースに封入した状態
を示す図である。前記の工程で得られた巻回素子２１
を、１２０℃での乾燥後、有底円筒型の外装ケース２２
に収納し、テトラエチルアンモニウムテトラフルオロボ
レートを０.７ｍｏｌ／Ｌの濃度でプロピレンカーボネ
ートに溶解させることによって調製した電解液を滴下
し、ガス吸収材料としてＬｉ４ＳｉＯ４粉末を加え、ゴ
ムパッキン２３を介してキャップ２４を取り付け、封口
して巻回型電気二重層キャパシタとした。FIG. 2 is a view showing a state in which the winding element is enclosed in a case. The wound element 21 obtained in the above process
After drying at 120 ° C., the bottomed cylindrical outer case 22
The electrolyte solution prepared by dissolving tetraethylammonium tetrafluoroborate in propylene carbonate at a concentration of 0.7 mol / L was added dropwise, Li 4 SiO 4 powder was added as a gas absorbing material, and the rubber packing 23 was used. The cap 24 was attached and sealed to obtain a wound electric double layer capacitor.
【００２７】なお、ガス吸収材料の添加、付与方法とし
ては、ここに説明した方法に限定されるものではない。
たとえば、中空を有する円盤状に形成した、不職布など
からなる容器に、前記材料を充填してケースの底部に配
置してもよい。The method for adding and applying the gas absorbing material is not limited to the method described here.
For example, a container made of unwoven cloth or the like formed in the shape of a hollow disk may be filled with the above-mentioned material and placed at the bottom of the case.
【００２８】（実施例２）ガス吸収材料としてＬｉ2Ｚ
ｒＯ3を用いた他は、実施例１と同様にして巻回型電気
二重層キャパシタを製作した。これらの巻回型電気二重
層キャパシタについて、印加電圧２.７Ｖで充電し、５
０ｍＡで放電した場合の初期静電容量と等価直列抵抗
（Equivalent Series Resistance、以下、ＥＳＲと記
す）を測定した。(Example 2) Li 2 Z as a gas absorbing material
A wound electric double layer capacitor was manufactured in the same manner as in Example 1 except that rO 3 was used. These wound electric double layer capacitors were charged with an applied voltage of 2.7 V and
The initial capacitance and the equivalent series resistance (hereinafter referred to as ESR) when discharged at 0 mA were measured.
【００２９】引き続き、これらの巻回型電気二重層キャ
パシタに、２.７Ｖの電圧を印加しながら、温度を７０
℃に設定した恒温槽中で１０００時間保持した後、静電
容量とＥＳＲを測定した。また、比較のために、ガス吸
収材料をまったく添加しなかった他は、前記実施例と同
様にして巻回型電気二重層キャパシタを作製し、同様の
評価を行った。表１は、これら実施例と比較例の結果を
示したものである。Subsequently, while applying a voltage of 2.7 V to these wound electric double layer capacitors, the temperature was raised to 70
After holding for 1000 hours in a constant temperature bath set at ° C, the capacitance and ESR were measured. For comparison, a wound-type electric double layer capacitor was prepared in the same manner as in the above example except that no gas absorbing material was added, and the same evaluation was performed. Table 1 shows the results of these examples and comparative examples.
【００３０】[0030]
【表１】 [Table 1]
【００３１】表１から明らかなように、実施例１及び実
施例２の電気二重層キャパシタでは、静電容量の減少率
が、それぞれ１.７２％、１.７４％であるのに対し、比
較例の電気二重層キャパシタでは、９.３１％という結
果であり、静電容量劣化の程度に顕著な差があることが
明らかである。As is clear from Table 1, in the electric double layer capacitors of Example 1 and Example 2, the rate of decrease in capacitance was 1.72% and 1.74%, respectively. In the electric double layer capacitor of the example, the result is 9.31%, and it is clear that there is a significant difference in the degree of capacitance deterioration.
【００３２】また、ＥＳＲについても、実施例１及び実
施例２の電気二重層キャパシタでは、その増加率が、そ
れぞれ、８.１１％、７.７６％であるに対し、比較例の
電気二重層キャパシタでは、３７.０％と、顕著な差が
認められ、本発明によって、長期信頼性の高い電気二重
層キャパシタが得られることが分かる。Regarding the ESR, the increase rates of the electric double layer capacitors of Example 1 and Example 2 are 8.11% and 7.76%, respectively, whereas the electric double layer capacitors of the comparative example are ESR. In the capacitor, a remarkable difference of 37.0% is recognized, and it is understood that the present invention can provide an electric double layer capacitor having high long-term reliability.
【００３３】[0033]
【発明の効果】以上に説明したように、経時変化に伴っ
て発生するガスを、ケース内部に発生ガスを吸収する材
料を加えることにより、内部圧力の上昇を抑制し、その
結果、静電容量の低下やＥＳＲの増大などの特性劣化が
少なく、信頼性の高い電気二重層キャパシタが得られ
る。As described above, the increase of the internal pressure is suppressed by adding a material absorbing the generated gas to the gas generated with the lapse of time, and as a result, the capacitance is increased. Of the electric double layer capacitor having a high reliability with less deterioration in characteristics such as a decrease in charge and an increase in ESR.
【図１】巻回素子の構成を示した斜視図。FIG. 1 is a perspective view showing a configuration of a winding element.
【図２】巻回素子をケースに封入した状態を示す図。FIG. 2 is a diagram showing a state in which a winding element is enclosed in a case.
１０，２１ 巻回素子 １１ セパレータ １２ 正極側の分極性電極 １３ 正極側の集電体 １４ 負極側の分極性電極 １５ 負極側の集電体 １６，２５ リード端子 ２２ 外装ケース ２３ ゴムパッキン ２４ キャップ 10,21 winding element 11 separator 12 Polarizable electrode on the positive electrode side 13 Current collector on the positive electrode side 14 Negative polarizable electrode 15 Negative electrode side current collector 16,25 lead terminals 22 Exterior case 23 Rubber packing 24 caps
Claims (3)
と、その分極性電極間にセパレータを介在させ、電解液
を含浸させて外装ケースに収めた電気二重層キャパシタ
において、前記外装ケース内部にガス吸収材料を含むこ
とを特徴とする電気二重層キャパシタ。1. An electric double layer capacitor in which a polarizable electrode formed on a pair of current collectors and a separator interposed between the polarizable electrodes is impregnated with an electrolytic solution and accommodated in an outer case, wherein the outer casing is provided. An electric double layer capacitor comprising a gas absorbing material inside a case.
において、前記ガス吸収材料は、リチウム複合酸化物、
ゼオライトの少なくともいずれかを含むことを特徴とす
る電気二重層キャパシタ。2. The electric double layer capacitor according to claim 1, wherein the gas absorbing material is a lithium composite oxide,
An electric double layer capacitor comprising at least one of zeolite.
において、前記リチウム複合酸化物が、Ｌｉ2ＺｒＯ3、
ＬｉＦｅＯ2、ＬｉＮｉＯ2、Ｌｉ2ＴｉＯ3、Ｌｉ2Ｓｉ
Ｏ3、Ｌｉ4ＳｉＯ4から選ばれる少なくとも１種である
ことを特徴とする電気二重層キャパシタ。3. The electric double layer capacitor according to claim 2, wherein the lithium composite oxide is Li 2 ZrO 3 ,
LiFeO 2 , LiNiO 2 , Li 2 TiO 3 , Li 2 Si
An electric double layer capacitor, which is at least one selected from O 3 and Li 4 SiO 4 .
Priority Applications (1)
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| JP2002095713A JP2003297699A (en) | 2002-03-29 | 2002-03-29 | Electric double-layer capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002095713A JP2003297699A (en) | 2002-03-29 | 2002-03-29 | Electric double-layer capacitor |
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|---|---|
| JP2003297699A true JP2003297699A (en) | 2003-10-17 |
Family
ID=29387292
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