JP3792528B2 - Manufacturing method of electric double layer capacitor - Google Patents
Manufacturing method of electric double layer capacitor Download PDFInfo
- Publication number
- JP3792528B2 JP3792528B2 JP2001117760A JP2001117760A JP3792528B2 JP 3792528 B2 JP3792528 B2 JP 3792528B2 JP 2001117760 A JP2001117760 A JP 2001117760A JP 2001117760 A JP2001117760 A JP 2001117760A JP 3792528 B2 JP3792528 B2 JP 3792528B2
- Authority
- JP
- Japan
- Prior art keywords
- activated carbon
- electric double
- layer capacitor
- double layer
- manufacturing
- 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
Images
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】
【発明の属する技術分野】
本発明は、電気二重層コンデンサの製造方法に関する。
【０００２】
【従来の技術】
電気二重層コンデンサは、ファラッド級の大容量を有し、充放電サイクル特性にも優れることから、電子機器のバックアップ電源や自動車を始めとした各種輸送機のバッテリーとして用いられている他、エネルギーの有効利用の観点からは、夜間電力の貯蔵といった用途での使用も検討されている。
【０００３】
上記電気二重層コンデンサは、例えば、図３に示すように、有機電解液４８に、分極性電極４２を集電体４０に密着させた正極１８及び負極１９との間に、セパレータ４４を介在させた電極体４５を、ケース４６内で浸漬されてなるものである。
【０００４】
このとき、上記分極性電極は、粉末状活性炭又は繊維状活性炭を主成分とするものであり、上記活性炭の特性値として比表面積が知られていた。
【０００５】
しかしながら、大きな比表面積の活性炭を適用しても必ずしも高容量密度の電気二重層コンデンサを得ることができないことが知られている（森本，平塚，真田ら，電気化学，６３，５８９（１９９５））。
従って、高容量密度化を図るために、高比表面積の活性炭を用いても特性が不十分であったり、ばらつきが生じるため、安定した高容量密度の電気二重層コンデンサを得ることが困難であった。
【０００６】
【発明が解決しようとする課題】
本発明は、このような従来技術の有する課題を鑑みてなされたものであり、その目的とするところは、高容量密度化が可能で、且つ特性の安定した電気二重層コンデンサの製造方法を提供するものである。
【０００７】
【課題を解決するための手段】
即ち、本発明によれば、有機電解液中に、粉末状又は繊維状である活性炭を主成分とする分極性電極、セパレータ及び集電体からなる電極体が浸漬された電気二重層コンデンサの製造方法であって、窒素吸着より求めた活性炭１ｇ当たりの全細孔体積をＶTP、炭素の真密度が２ｇ／ｃｃ時における活性炭１ｇ当たりの見掛け体積ＶACを、ＶAC＝ＶTP＋１／２なる式で算出した後、窒素吸着より求めた細孔直径が０．８〜１ｎｍの範囲にある活性炭１ｇ当たりの細孔体積ＶPとし、Ｘ＝ＶP／ＶACなる式で算出した特性値Ｘが、０．３以上である活性炭を分極性電極に用いることを特徴とする電気二重層コンデンサの製造方法が提供される。
【０００８】
【発明の実施の形態】
本発明の電気二重層コンデンサの製造方法は、窒素吸着より求めた活性炭１ｇ当たりの全細孔体積をＶTP、炭素の真密度が２ｇ／ｃｃ時における活性炭１ｇ当たりの見掛け体積ＶACを、ＶAC＝ＶTP＋１／２なる式で算出した後、窒素吸着より求めた細孔直径が０．８〜１ｎｍの範囲にある活性炭１ｇ当たりの細孔体積ＶPとし、Ｘ＝ＶP／ＶACなる式で算出した特性値Ｘが、０．３以上（より好ましくは、０．３５以上）である活性炭を分極性電極に用いることにある。
これにより、従来の比表面積による活性炭の評価方法と比較して、本発明で提案する活性炭の特性値Ｘが、電気二重層コンデンサの体積静電容量密度との間で比例関係が成立するため、体積静電容量密度を大きな、即ちエネルギー密度が大きく、実用的に好適な電気二重層コンデンサをばらつきなく製造することができる。
【０００９】
ここで、本発明で用いる活性炭は、部分的に酸化させた黒鉛類似の微結晶炭素を有する炭素材料であり、その形状が粉体状又は繊維状であることが好ましい。
【００１０】
尚、本発明で用いる活性炭について詳細に説明する。
まず、本発明の活性炭の作製にあたっては、先ず、石油コークス、石炭コークス、石油ピッチ（タール）、石炭ピッチ（タール）、フェノール樹脂、メソフェーズカーボン、ポリ塩化ビニル、ポリ塩化ビニリデン、ポリイミド、ヤシガラ、大鋸屑等の有機材料を、不活性ガス雰囲気中で、約７００℃〜１０００℃の温度範囲で熱処理し、炭化材料を得る。これらの有機材料は、１種類を単独で用いてもよく、また複数種の混合物として用いてもよい。不活性ガスとしては、窒素ガスやアルゴンガス、ヘリウムガスといった希ガスが好適に用いられる。
【００１１】
次に、得られた粉末状又は繊維状の炭化材料を賦活（部分酸化）することにより、本発明で用いる活性炭を得ることができる。ここで、賦活（部分酸化）の方法としては、水蒸気や空気や酸素等の酸化性ガスによる熱処理や、塩化亜鉛等を用いた薬品酸化方法の他、アルカリ金属および酸素元素を含む含酸素アルカリ化合物（以下、「アルカリ金属等」という。）の少なくとも１種と共に、不活性ガス雰囲気中で熱処理する酸化方法を挙げることができる。
【００１２】
アルカリ金属元素としては、カリウム、ナトリウム、リチウムが好適に用いられ、これらアルカリ金属の含酸素化合物としては、水酸化カリウム、水酸化ナトリウム等の水酸化物や炭酸カリウム、炭酸ナトリウム等の炭酸塩が好適に用いられる。これらのアルカリ金属等は、複数種を混合して用いてもよい。
【００１３】
上記炭化材料は、こうして熱処理された後、必要に応じてメタノールやエタノール等のアルコール系溶媒や水等を用いて、洗浄、濾過、乾燥して単離することにより、本発明で用いる活性炭を得ることができる。
【００１４】
尚、本発明で用いる分極性電極は、上記で得られた粉末状又は繊維状の活性炭に、カーボンブラック等の導電材や有機バインダを添加し、混合・混練し、シート状に成形したものである。集電体は、表面をエッチング処理したアルミ箔を好適に用いることができる。電極端子は、電気伝導性と電解液に対する安定性から高純度アルミニウムを好適に用いることができる。セパレータは、コンデンサ用の紙セパレータや、ポリエチレン、ポリプロピレン、ポリテトラフルオロエチレン製の多孔性樹脂フィルムを用いることができる。
【００１５】
また、本発明で用いる電解液は、キャパシタとして耐電圧が高くエネルギー密度を大きくできる有機系電解液が好ましい。有機系電解液の溶媒としては、プロピレンカーボネート、γ−ブチルラクトン、エチレンカーボネート、ジメチルカーボネート、ジエチルカーボネート、エチルメチルカーボネート、スルホランがあり、これらを単独で、あるいは、複数種混合したり、この他の溶媒や界面活性剤等の添加剤を加えた溶媒が好適に用いられる。電解質としては、４級アンモニウム塩、例えば、テトラエチルアンモニウム、テトラブチルアンモニウム、トリエチルメチルアンモニウムの４フッ化ホウ素塩または６フッ化リン酸塩、あるいは、４級ホスホニウムの４フッ化ホウ素塩または６フッ化リン酸塩などを用いることができる。
【００１６】
【実施例】
以下、本発明を実施例に基づいて更に詳細に説明するが、本発明はこれらの実施例に限定されるものではない。
（実施例１〜６、比較例１〜３）
表１に示す原料の炭化物を、表１に示す特性値Ｘになるように賦活することにより、活性炭Ａ〜Ｉを作製した。
尚、特性値Ｘは、活性炭１ｇ当たりの全細孔体積ＶTP並びに０．８〜１ｎｍの細孔体積ＶPは、米国マイクロメリテックス社製ＡＳＡＰ２０００を用いて、窒素の等温吸着線を測定し、ＭＰ法にて評価したものである。
また、活性炭Ａ〜Ｉの比表面積は、米国マイクロメリテックス社製ＤｅＳｏｒｂ２３００を用い、Ｎ2ＢＥＴ法にて測定した。その結果を表１に示す。
【００１７】
次に、得られた活性炭Ａ〜Ｉを用いて、活性炭８０重量％、導電剤としてカーボンブラックを１０重量％、バインダーとしてポリテトラフルオロエチレンを１０重量％混合し、約１５０μｍの厚みの電極シートをそれぞれ作製した。
【００１８】
次に、得られた電極シートから打ち抜いた直径２０ｍｍのディスク２枚を、正負極の分極性電極とし、厚さ３０μｍのアルミニウム箔を集電体、厚さ２５μｍの多孔質ポリエチレンフィルムをセパレータとして組み合わせ電極体とし、これを有機電解液である１Ｍのテトラエチルアンモニウム・テトラフルオロボレートを溶解したプロピレンカーボネートに含浸させることにより、電気二重層コンデンサをそれぞれ作製した。
【００１９】
得られた電気二重層コンデンサの室温での静電容量を、５ｍＡ／ｃｍ2の電流密度で、０〜２．５Ｖまでの範囲の充放電にて評価した。その結果を表１に示す。
尚、表１に示す体積静電容量密度は、測定された静電容量を、正負極の電極シート体積の合計で除した値である。
【００２０】
【表１】
（考察）
本発明では、図１に示すように、電気二重層コンデンサの体積静電容量密度と活性炭の特性値Ｘとの間に比例関係が成立することを確認した。
これにより、特性値Ｘを指標として電気二重層コンデンサを製造した場合、電気二重層コンデンサの品質を簡便且つ確実に維持することができる。
また、本発明では、表１の結果から、特性値Ｘが０．３以上、更に好ましくは０．３５以上の活性炭（実施例１〜６）を用いることにより、１０Ｆ／ｃｃ以上の体積静電容量密度を有する、即ちエネルギー密度が大きく、実用的に好適な電気二重層コンデンサを製造することができた。
一方、従来の方法では、図２に示すように、体積静電容量密度と比表面積との相関関係が不十分であるため、比表面積を指標として電気二重層コンデンサを製造した場合、体積静電容量密度が十分でなく、且つばらつきの大きな電気二重層コンデンサしか製造することができなかった。
【００２２】
【発明の効果】
以上の通り、本発明に係る電気二重層コンデンサの製造方法は、高容量密度化が可能で、且つ特性の安定した電気二重層コンデンサを得ることができる。
【図面の簡単な説明】
【図１】 電気二重層コンデンサの体積静電容量密度と活性炭の特性値Ｘとの関係を示すグラフである。
【図２】 電気二重層コンデンサの体積静電容量密度と活性炭の比表面積との関係を示すグラフである。
【図３】 電気二重層コンデンサの一例を示す概要図である。
【符号の説明】
１８…正極（正電極）、１９…負極（負電極）、４０…集電体、４２…分極性電極、４４…セパレータ、４５…電極体、４６…ケース、４８…有機電解液。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing an electric double layer capacitor.
[0002]
[Prior art]
Electric double layer capacitors have a farad-class capacity and excellent charge / discharge cycle characteristics, so they are used as backup power sources for electronic equipment and batteries for various transport equipment including automobiles. From the viewpoint of effective use, use in applications such as nighttime power storage is also being considered.
[0003]
In the electric double layer capacitor, for example, as shown in FIG. 3, a separator 44 is interposed between a positive electrode 18 and a
[0004]
At this time, the polarizable electrode is mainly composed of powdered activated carbon or fibrous activated carbon, and the specific surface area was known as a characteristic value of the activated carbon.
[0005]
However, it is known that an electric double layer capacitor having a high capacity density cannot always be obtained even when activated carbon having a large specific surface area is applied (Morimoto, Hiratsuka, Sanada et al., Electrochemistry, 63, 589 (1995)). .
Therefore, even if activated carbon with a high specific surface area is used in order to achieve a high capacity density, characteristics are insufficient or variations occur, and it is difficult to obtain a stable electric double layer capacitor with a high capacity density. It was.
[0006]
[Problems to be solved by the invention]
The present invention has been made in view of such problems of the prior art, and an object of the present invention is to provide a method for manufacturing an electric double layer capacitor capable of increasing the capacity density and having stable characteristics. To do.
[0007]
[Means for Solving the Problems]
That is, according to the present invention, an electric double layer capacitor manufactured by immersing an electrode body comprising a polarizable electrode, a separator and a current collector mainly composed of powdered or fibrous activated carbon in an organic electrolyte solution a method, a total pore volume per activated carbon 1g determined from nitrogen adsorption V TP, the apparent volume V AC per activated carbon 1g true density of carbon at 2g / cc, V AC = V TP + 1/2 The characteristic value calculated by the equation X = V P / V AC with the pore volume V P per gram of activated carbon having a pore diameter determined by nitrogen adsorption in the range of 0.8 to 1 nm. There is provided a method for producing an electric double layer capacitor, wherein activated carbon having X of 0.3 or more is used for a polarizable electrode.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Method for producing an electric double layer capacitor of the present invention, the total pore volume per activated carbon 1g determined from nitrogen adsorption V TP, the apparent volume V AC per activated carbon 1g true density of carbon at 2 g / cc, V after calculating with AC = V TP + 1/2 becomes formula, the pore diameter determined from the nitrogen adsorption and a pore volume V P per activated carbon 1g in the range of 0.8~1nm, X = V P / V AC The activated carbon having a characteristic value X calculated by the following formula is 0.3 or more (more preferably 0.35 or more) is used for the polarizable electrode.
Thereby, compared with the evaluation method of activated carbon by the conventional specific surface area, since the characteristic value X of the activated carbon proposed in the present invention is proportional to the volume capacitance density of the electric double layer capacitor, An electric double layer capacitor having a large volume capacitance density, that is, a large energy density and suitable for practical use can be manufactured without variation.
[0009]
Here, the activated carbon used in the present invention is a carbon material having partially oxidized graphite-like microcrystalline carbon, and the shape thereof is preferably powdery or fibrous.
[0010]
The activated carbon used in the present invention will be described in detail.
First, in producing the activated carbon of the present invention, first, petroleum coke, coal coke, petroleum pitch (tar), coal pitch (tar), phenol resin, mesophase carbon, polyvinyl chloride, polyvinylidene chloride, polyimide, coconut husk, large sawdust Is heat-treated in an inert gas atmosphere at a temperature range of about 700 ° C. to 1000 ° C. to obtain a carbonized material. These organic materials may be used alone or as a mixture of a plurality of types. As the inert gas, a rare gas such as nitrogen gas, argon gas, or helium gas is preferably used.
[0011]
Next, activated carbon used in the present invention can be obtained by activating (partial oxidation) the obtained powdered or fibrous carbonized material. Here, the activation (partial oxidation) method includes heat treatment using an oxidizing gas such as water vapor, air and oxygen, and a chemical oxidation method using zinc chloride, as well as an oxygen-containing alkali compound containing an alkali metal and an oxygen element. (Hereinafter, it is referred to as “alkali metal etc.”) and an oxidation method in which heat treatment is performed in an inert gas atmosphere.
[0012]
As the alkali metal element, potassium, sodium and lithium are preferably used, and as the oxygen-containing compound of these alkali metals, hydroxides such as potassium hydroxide and sodium hydroxide and carbonates such as potassium carbonate and sodium carbonate are used. Preferably used. These alkali metals and the like may be used as a mixture of plural kinds.
[0013]
After the carbonized material is heat-treated in this manner, it is washed, filtered, dried and isolated using an alcohol solvent such as methanol or ethanol, water, or the like as necessary, to obtain activated carbon used in the present invention. be able to.
[0014]
The polarizable electrode used in the present invention is obtained by adding a conductive material such as carbon black or an organic binder to the powdered or fibrous activated carbon obtained above, mixing and kneading, and forming into a sheet shape. is there. As the current collector, an aluminum foil whose surface is subjected to etching treatment can be suitably used. As the electrode terminal, high-purity aluminum can be suitably used because of its electrical conductivity and stability to the electrolyte. As the separator, a paper separator for capacitors, or a porous resin film made of polyethylene, polypropylene, or polytetrafluoroethylene can be used.
[0015]
Moreover, the electrolytic solution used in the present invention is preferably an organic electrolytic solution that has a high withstand voltage and a high energy density as a capacitor. Solvents for organic electrolytes include propylene carbonate, γ-butyl lactone, ethylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, and sulfolane. These may be used alone or in combination. A solvent to which an additive such as a solvent or a surfactant is added is preferably used. The electrolyte may be a quaternary ammonium salt, for example, tetraethylammonium, tetrabutylammonium, boron tetrafluoride or hexafluorophosphate, or quaternary phosphonium boron tetrafluoride or hexafluoride. Phosphate and the like can be used.
[0016]
【Example】
EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example, this invention is not limited to these Examples.
(Examples 1-6, Comparative Examples 1-3)
Activated carbons A to I were produced by activating the raw material carbides shown in Table 1 so as to have characteristic values X shown in Table 1.
The characteristic value X is the total pore volume V TP per gram of activated carbon and the pore volume V P of 0.8 to 1 nm is measured by measuring the isothermal adsorption line of nitrogen using ASAP2000 manufactured by US Micromeritex Corporation. , Evaluated by the MP method.
In addition, the specific surface areas of the activated carbons A to I were measured by the N 2 BET method using DeSorb2300 manufactured by Micromerex, USA. The results are shown in Table 1.
[0017]
Next, using the obtained activated carbons A to I, 80% by weight of activated carbon, 10% by weight of carbon black as a conductive agent, and 10% by weight of polytetrafluoroethylene as a binder were mixed to prepare an electrode sheet having a thickness of about 150 μm. Each was produced.
[0018]
Next, two 20 mm diameter disks punched from the obtained electrode sheet were used as positive and negative polarizable electrodes, a 30 μm thick aluminum foil as a current collector, and a 25 μm thick porous polyethylene film as a separator. An electric double layer capacitor was produced by impregnating propylene carbonate in which 1M tetraethylammonium tetrafluoroborate, which is an organic electrolyte solution, was impregnated with an electrode body.
[0019]
The capacitance of the obtained electric double layer capacitor at room temperature was evaluated by charging / discharging in the range of 0 to 2.5 V at a current density of 5 mA / cm 2 . The results are shown in Table 1.
The volume capacitance density shown in Table 1 is a value obtained by dividing the measured capacitance by the total of the positive and negative electrode sheet volumes.
[0020]
[Table 1]
(Discussion)
In the present invention, as shown in FIG. 1, it was confirmed that a proportional relationship was established between the volume capacitance density of the electric double layer capacitor and the characteristic value X of the activated carbon.
Thereby, when an electric double layer capacitor is manufactured using the characteristic value X as an index, the quality of the electric double layer capacitor can be easily and reliably maintained.
In the present invention, from the results shown in Table 1, by using activated carbon (Examples 1 to 6) having a characteristic value X of 0.3 or more, more preferably 0.35 or more, a volume electrostatic capacity of 10 F / cc or more is used. An electric double layer capacitor having a capacitance density, that is, a large energy density and suitable for practical use could be manufactured.
On the other hand, in the conventional method, as shown in FIG. 2, since the correlation between the volume capacitance density and the specific surface area is insufficient, when an electric double layer capacitor is manufactured using the specific surface area as an index, Only electric double layer capacitors with insufficient capacitance density and large variations could be produced.
[0022]
【The invention's effect】
As described above, the method for producing an electric double layer capacitor according to the present invention can provide an electric double layer capacitor having a high capacity density and stable characteristics.
[Brief description of the drawings]
FIG. 1 is a graph showing the relationship between the volume capacitance density of an electric double layer capacitor and the characteristic value X of activated carbon.
FIG. 2 is a graph showing the relationship between the volume capacitance density of an electric double layer capacitor and the specific surface area of activated carbon.
FIG. 3 is a schematic diagram showing an example of an electric double layer capacitor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 18 ... Positive electrode (positive electrode), 19 ... Negative electrode (negative electrode), 40 ... Current collector, 42 ... Polarizable electrode, 44 ... Separator, 45 ... Electrode body, 46 ... Case, 48 ... Organic electrolyte solution.
Claims (1)
窒素吸着より求めた活性炭１ｇ当たりの全細孔体積をＶTP、炭素の真密度が２ｇ／ｃｃ時における活性炭１ｇ当たりの見掛け体積ＶACを、ＶAC＝ＶTP＋１／２なる式で算出した後、窒素吸着より求めた細孔直径が０．８〜１ｎｍの範囲にある活性炭１ｇ当たりの細孔体積ＶPとし、Ｘ＝ＶP／ＶACなる式で算出した特性値Ｘが、０．３以上である活性炭を分極性電極に用いることを特徴とする電気二重層コンデンサの製造方法。A method for producing an electric double layer capacitor in which an electrode body composed of a polarizable electrode mainly composed of powdered or fibrous activated carbon, a separator and a current collector is immersed in an organic electrolyte solution,
The total pore volume per activated carbon 1g determined from nitrogen adsorption V TP, the apparent volume V AC per activated carbon 1g true density of carbon at 2 g / cc, was calculated by V AC = V TP + 1/ 2 becomes formula Thereafter, a pore volume V P per 1 g of activated carbon having a pore diameter determined by nitrogen adsorption in the range of 0.8 to 1 nm is assumed, and the characteristic value X calculated by the formula X = V P / V AC is 0.00. A method for producing an electric double layer capacitor, wherein activated carbon of 3 or more is used for a polarizable electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001117760A JP3792528B2 (en) | 2001-04-17 | 2001-04-17 | Manufacturing method of electric double layer capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001117760A JP3792528B2 (en) | 2001-04-17 | 2001-04-17 | Manufacturing method of electric double layer capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002313686A JP2002313686A (en) | 2002-10-25 |
| JP3792528B2 true JP3792528B2 (en) | 2006-07-05 |
Family
ID=18968247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001117760A Expired - Lifetime JP3792528B2 (en) | 2001-04-17 | 2001-04-17 | Manufacturing method of electric double layer capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3792528B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9799459B2 (en) | 2014-08-08 | 2017-10-24 | Corning Incorporated | High pore volume utilization carbon and electric double layer capacitor |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006252902A (en) * | 2005-03-10 | 2006-09-21 | Kawasaki Heavy Ind Ltd | Hybrid battery |
| CN113959902A (en) * | 2021-09-14 | 2022-01-21 | 陕西创普斯新能源科技有限公司 | Method for measuring true density of lithium iron phosphate powder |
-
2001
- 2001-04-17 JP JP2001117760A patent/JP3792528B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9799459B2 (en) | 2014-08-08 | 2017-10-24 | Corning Incorporated | High pore volume utilization carbon and electric double layer capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002313686A (en) | 2002-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3496338B2 (en) | Electric double layer capacitor | |
| JP5228531B2 (en) | Electricity storage device | |
| CN1941238B (en) | Electric double layer capacitor | |
| JP5015146B2 (en) | ELECTRODE FOR ENERGY STORAGE SYSTEM, MANUFACTURING METHOD THEREOF, AND ENERGY STORAGE SYSTEM INCLUDING THE ELECTRODE | |
| JP6382981B2 (en) | Low resistance ultracapacitor electrode and manufacturing method thereof | |
| US20080003166A1 (en) | Methods of forming nanoporous carbon material and electrodes and electrochemical double layer capacitors therefrom | |
| JP5392355B2 (en) | Electric double layer capacitor | |
| US20110043968A1 (en) | Hybrid super capacitor | |
| JP2014530502A (en) | High voltage electrochemical double layer capacitor | |
| JP2006286924A (en) | Lithium ion capacitor | |
| JP2016538715A (en) | Ultracapacitor with improved aging performance | |
| JP2016531068A (en) | High voltage EDLC electrode containing CO2 activated coconut charcoal | |
| JP2005129924A (en) | Metal collector for use in electric double layer capacitor, and polarizable electrode as well as electric double layer capacitor using it | |
| JP2002231585A (en) | Electric double-layered capacitor | |
| JP4527821B2 (en) | Electrochemical capacitor | |
| EP1296338B1 (en) | Process for producing an electric double layer capacitor and positive electrode for an electric double layer capacitor | |
| JP3792528B2 (en) | Manufacturing method of electric double layer capacitor | |
| JP4053955B2 (en) | Manufacturing method of electric double layer capacitor | |
| JPH11145009A (en) | Electric double layer capacitor | |
| JP3800810B2 (en) | Electric double layer capacitor | |
| JP2007194614A (en) | Electric double layer capacitor | |
| JP2000315630A (en) | Electrolyte for electrochemical capacitor and electrochemical capacitor using | |
| JP2001267188A (en) | Electrochemical capacitor | |
| KR102361162B1 (en) | Manufacturing method of anode active material for hybrid supercapacitor having high output characteristics and hybrid supercapacitor including the same and method of manufacturing thereof | |
| JP2023154302A (en) | Carbon material, electrode material for hybrid capacitor, electrode for hybrid capacitor, and hybrid capacitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20050216 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20050531 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050617 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20060404 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20060405 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 Ref document number: 3792528 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100414 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100414 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110414 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110414 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120414 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120414 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130414 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140414 Year of fee payment: 8 |