TW200932676A - Method of manufacturing active carbon and electric double layer capacitor (EDLC) - Google Patents

Abstract

This invention provides an optimum active carbon required for an electric double layer capacitor (EDLC) having a large electrostatic capacity and low-priced material expenses or other similar purposes. The active carbon is produced by the following steps: a step of acquiring carbide by carbonizing raw materials obtained from bagasse produced in Okinawa or other regions (especially for the integument part obtained by separating the core part and the rind part of the foregoing bagasse), and a step of performing alkali activation for the foregoing carbide.

Description

200932676 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a method for producing activated carbon having a large specific surface area. This activated carbon is the main component of the bipolar electrode of the electric double layer capacitor' and is also suitable for other similar applications. Further, the present invention relates to a method of manufacturing an electric double layer capacitor comprising a pair of polarization electrodes, a separation film disposed between the opposite polarity electrodes, and each of the ❿ 极性 polarity electrodes One of the pair of collectors and the electrolyte in contact with the pair of polar electrodes. [Prior Art] Conventionally, an electric double layer capacitor using activated carbon as a main component of a polar electrode is a conventional fact. For example, the electric double-layer capacitor includes a pair of sub-polar electrodes disposed opposite to each other on both sides of the separation film, and a bipolar electrode disposed on the opposite side of the separation film, as disclosed in Japanese Patent No. 3330235 (Patent Document No.). A pair of collector electrodes provided on the outer side (i.e., opposite sides of the above separation film). Further, an electrolyte solution is contained in a polar electrode containing activated carbon as a main component. The electric charge is accumulated in one of the pair of electric double layers generated between the electrolyte and one of the pair of bipolar electrodes. Further, as described in Patent Document 1, as the activated carbon for the polarization electrode of the electric double layer capacitor, the performance of the activated carbon obtained from the phenol resin is higher than that of the cellulose obtained by the paper. The performance of activated carbon obtained by carbonization and activation is excellent. In the invention disclosed in Patent Document 1, a porous carbon material obtained by pulverizing a phenol resin laminated plate of a paper-based material and then carbonizing the metal cerium oxide for activation treatment is used as an electric double layer capacitor. Polar electrode 200932676 The active component of the main component. On the other hand, sugar cane bagasse (in other words, the residue after the cane juice is squeezed out) serves as a heat source or a fuel for power generation for a sugar plant, etc., and most of the waste is formed because it cannot be completely treated. Further, the bagasse which is a heat source or a fuel for power generation which cannot be completely used is also used as a paper, a soil improving material, and an adsorbing material. In order to use bagasse as an adsorbent material, it is produced by carbonization, gas activation, drug activation, and the like. However, the bet specific surface area of the produced suction material is about i, about 2m2/g. Further, the slag is composed of a hard outer skin portion of a honeycomb structure having a honeycomb structure formed by a capillary, and a core portion formed by soft cells at the center. The activated carbon obtained from the various parts (ie, the outer skin portion and the core) obtained after the separation of the core and the outer skin of the bagasse has not been discussed in detail. 77. In the electric double layer capacitor disclosed in Patent Document 1, the main component of the bipolar electrode active carbon is a paper-based resin laminated plate. Therefore, the electric double layer capacitor cannot have a large electrostatic capacity, and the cost of raw materials is also ^. The present invention is an invention for solving the above problems, and the object thereof is to provide a double-layer capacitor having a low raw material cost and a large electrostatic capacity, and the most suitable activated carbon for other similar uses (ie, , porous content [Summary of the Invention] The first aspect of the present invention relates to a step of producing an activated carbon or a raw material obtained from the production of the same, and a step of activating the above-mentioned carbide by alkali activation. In this case, the raw material is obtained by separating the core of the slag and the outer skin portion of 7 200932676 to obtain an outer skin. The bet specific surface area of the activated carbon obtained by alkali-activated the above raw material. The range of 3,000 to 3,5 〇Om 2 /g is preferably in the range of 3,250 to 3,400 m 2 /g. Further, the above first aspect of the present invention has a carbonization temperature of 673 K to 1,073 K. The range is preferably 733 K to 973 K. The alkali used for the alkali metal activation treatment is preferably a metal hydroxide such as sodium hydroxide or cesium hydroxide. Chemical When the treatment, the weight ratio of the alkali to the carbide is preferably in the range of 4 to 9, more preferably 5 to 8. Further, the above-mentioned alkali activation treatment temperature is preferably in the range of 9 to 1, The range of 223K is better. Moreover, the above-mentioned test / tongue temperature is preferably in the range of 100 Κ to 300 高 higher than the above carbonization temperature, and is in the range of 150 Κ to 250 高 in height, which is the user of double-layer capacitors. It is better to be better. In addition, the above-mentioned activated carbon is supplied between the power supply and the partition film, and the electric current is connected to the pair of electrodes. In the manufacturing method of the layer capacitor, the electrolyte contacted by the F electrode. The main component of the electric double-pole is obtained from the bagasse of at least the other 3 or more polar electrodes of the active 2, and the activated carbon is Okinawa. The production step and the step of carbonizing the carbide into the cerium-a raw material to obtain the carbide are obtained in the above-mentioned step of the smear of the present invention. The core of the bagasse and the outer skin are eight sides, and the above raw materials are borrowed as described above. The outer skin portion obtained by the electric double layer capacity I of the above-mentioned active Preferably, the range is 170~195F/g, and the range of 8200932676 PS-WOF/g is preferred. The test for the use of sodium hydroxide, potassium, etc. According to any one of the first and second aspects of the present invention, any one or two of the above-mentioned active substances and the above-mentioned active substances: 2 carbon parts, which can be appropriately cut and/or fully To carry out the series of iron handles, the broken m steps, and the:::, the cutting steps can be omitted, and the powder iii should be cut off. The invention can provide a large specific surface area and a static capacitance. Ling's patented scope of the second to fourth items... to apply for the invention of a larger static wire 4 to ^8_^_, the relevant road b, you - to borrow Shen Qing The patented range of 10 material costs and a relatively simple process can be used to provide electric double-layer capacitors with large double-layer capacitance. Further, the invention of the electric double layer can be further provided by the invention relating to the Thunder which is large in size: j曰 capacitor. In addition, the patent application scope 12 related layer container: " power supply double-layer capacity is quite large, very practical electric double [implementation] Thunder two on the embodiment of the present invention applied to electric double-layer capacitor It is divided into a schematic structure of the whole of the I, and (2) a test of the characteristic of the porous carbon of the polar electrode, and the like. According to the first to the eleventh, the schematic structure of the entire electric double layer capacitor is used in the present invention. - The electric double layer capacitor 1# of the embodiment and the second figure of 200932676 show a pair of upper and lower polarity electrodes 3 and 4 disposed via the separator 2, and a pair of upper and lower polarity electrodes The outer sides of 3, 4 (i.e., the opposite sides of the separation film 2) are provided with a pair of upper and lower collectors 5, 6. These laminates 2 to 6 are housed in a storage box 7 having a rectangular parallelepiped shape or the like made of a suitable synthetic resin or other material. Further, since the storage case 7 is filled with an appropriate electrolyte (in other words, an electrolyte), the above-mentioned electrolyte solution is also contained in the polarization electrodes 3 and 4, and the charge is accumulated in the electrolyte and the polarity of the upper and lower electrodes. The upper and lower pairs of electrodes 3, 4 are formed in the upper and lower pairs of electric double layers. As shown in the first and second figures, the separation film 2 may be a sheet having a smaller size, a substantially rectangular shape, and a thinner thickness than the inner circumference of the storage case 7. Further, the material of the separator 2 may be paper such as filter paper, cellulose (Cellul) or glass fiber. The upper and lower polarizing electrodes 3 and 4 are each composed of a porous carbon which is smaller than the separator 2 and each of which is composed of porous carbon such as activated carbon, and a method for producing a polar electrode. These upper and lower two == 55, : ' can be formed into a sheet having a thin thickness. The same shape but the size is:;, the approximate length is about = 5 2 6 = upper length; - the collector 2 of the collector 2 == the second part of the shape, the upper part of the shape of the sheet 4: other conductivity == , and the first and second pairs of the polar electrodes are arranged in a square shape and the thickness is thin. The above-mentioned upper and lower-pairs: 3, 4 10 200932676 can be obtained by the following detailed description. Activated carbon (ie, porous carbon) is added to a carbon black (Carbon black, manufactured by Sigma Aldrich) conductive agent and a binder of PTPE (polytetrafluoroethylene resin, manufactured by Sigma. Aldrich) in a weight ratio. After kneading as in 8:1:1, the model is press-formed to obtain a shape as shown in the first figure and the second figure. In the production of the above activated carbon, the raw material source is the sugar cane slag produced by Okinawa. The bagasse is composed of a hard outer skin portion and a soft core composed of two core portions, and has a weight ratio of about 18:7. In the present embodiment, each of the outer skin portion obtained by separating the core portion of the bagasse from the outer skin portion and the bagasse (ie, the core) in the state before the core portion and the outer skin portion are not separated are used. The state in which the part is integrated with the outer skin part is referred to herein as "core + outer skin" or "core + outer skin". Each of the above three types of raw materials is dried for 24 hours, and then placed in a platinum crucible in a quartz tube, for example, under a helium gas flow (for example, a flow rate of about 40 ml/min), and the temperature is raised to, for example, 973 K at a temperature increase rate of, for example, 5 K/min.碳 is carbonized at this temperature, for example, for about one hour. The three types of carbides obtained under such conditions (in other words, test materials) were subjected to the following treatments (for s, activation). In this case, an activator to be used is, for example, sodium hydroxide (manufactured by Wako Pure Chemical Industries, Ltd., Japan Experimental Grade). This alkali treatment is carried out in an aqueous solution (e.g., about 30 ml) prepared by oxidizing a gas to a weight ratio of 1.0 g to a weight of 1.0 g, and stirring for about 1 hour. After the mixing, the three kinds of samples were transferred to a platinum in a quartz tube, and the temperature was raised to about, for example, ι.〇73Κ at a temperature rising rate of, for example, 5 K/min, and maintained at the temperature for, for example, 1 hour. After the activation of the alkali, the three types of test raw materials 200932676 (for 5 activated carbon) were washed with pure water or diluted citric acid until the pH value after washing was about 7 soil. The three types of activated carbons produced as described above were each subjected to thermal vacuum drying. Then, each of the three types of activated carbon is kneaded in a weight ratio of 8:1:1 to the above-mentioned, for example, carbon black (manufactured by Sigma Alderich Co., Ltd.), for example, PTFE (manufactured by Sigma Aldrich Co., Ltd.). Then, the three kinds of kneaded materials were each filled in a mold and subjected to press molding to produce the shapes shown in the first figure and the second figure. Three kinds of polarization electrodes were respectively produced. Further, in the present invention, the above-mentioned method for producing activated carbon (also applicable to a polar electrode or an activated carbon electrode) is made of activated carbon produced by the core of bagasse (also applicable to a split electrode or an activated carbon electrode). Example 1; Activated carbon (also referred to as a polar electrode or an activated carbon electrode) produced by the outer skin adjacent injury of bagasse as a specific example 2, using activated carbon produced from bagasse (in other words, core + outer skin) The same applies to the case of the polar electrode or the activated carbon electrode. 3. Characteristics of activated carbon In the first method, the three types of porous carbon (in other words, activated carbon) produced by the specific example 丨 to 3 are tested in the characteristics of the activated carbon. The kneaded materials, each of which is filled with 〇, and =13 mm, are pressed to form a button shape H, and the three types of button-shaped bodies are pressed, for example, with a titanium mesh (a collector of a side of the side) Three kinds of activated carbon electric shuttles for testing can be produced, and the characteristics of the three kinds of _activated carbon electrodes are compared with each other. _: Experiment with the characteristics of the breaking factor" "By Dependence" (4) to (4) Porous Carboniferous (In other words, the pore characteristics of the activated carbon) were tested by a nitrogen sorption type pore distribution measurement with a constant volume of 12 200932676 77K, ASAP2020). (At this time, the volume of the micropores is calculated by MP, and the volume of the mesoporous (mes〇p〇re) is analyzed by the BJH method. The surface of the activated carbon is scanned by scanning electron microscopy (4). Carbon, nitrogen, nitrogen ^ observation Jin (YANAC〇 Analytical Industrial Co., Ltd., YANACO CHN Corder placed 10 to determine the content of stone, hydrogen and nitrogen, respectively, and then the total amount of reduced content is the oxygen content, and The three types of (d) electric double-layer capacity are tested using a 3-pole battery. (At this time, any of the above three kinds of activated carbon electrodes (with _丨 to 3) are used. The weight of the activated carbon electrode (any one of the specific examples 3), the reference electrode uses a saturated calomel (Calomel) electrode. Ray 5 〇〇 ml ° ^ each recognizes the constant current in the process of positive and negative directions (for example, 1 〇 The potential of 〇m and the slope of the time-change curve are calculated according to the following equation: C=IxAT/(V2 ~V1)=ixat/AV I : a certain current

Vi·Charging or discharging start potential V2 : Charging or discharging end potential ΔT·Time required for charging or discharging • First, as the above-mentioned three types of activated carbon raw materials (ie, core skin portion) and other parts ( That is, the "core" and the "appearance" indicate that the elemental analysis value of the ginseng method is as shown in the following table i. That is, the content of each of the sputum, the sputum, and the oxygen is substantially the same regardless of the outer skin or the material. The content of the part has a higher value (about 13 200932676 5.8wt%) than the outer part of the core; H-(daf) [wt%] ~~· _ Moer than [-] ash (d. b) ) [wt%] CHN 〇 (poor) H/CO/C heart + outer skin (7:18) 0.6 47.6 5.7 0.2 46.5 1.44 0.73 core 5.8 48.5 5.9 0.5 45.2 1.45 0. 70 outer skin 1.9 48.3 5.8 0.2 45.6 1.45 0.71 Daf: waterless ash-free d. b: dry basis. The third figure (A) is the SEM micrograph of the core of the bagasse. In addition, the figure (B) is outside the slag. SEM micrograph of the epidermis. = The external epidermis has a capillary with a majority of pore sizes of about ι〇_

In contrast, in the third figure (4), it is known that the core does not have as many voids as the outer skin, and is in the form of a powder. W rBL 10 Next, the carbonaceous material and various parts thereof are described by carbon, and two kinds of raw materials (ie, Carbonized in the temperature range of W3K~973K of the bagasse, and the carbonized temperature of the core and the outer skin of the stagnation, and the ruthenium The carbonization temperature is higher than the _ heart yield;; Γ =? Γ 73 Κ when the yield is almost maintained at - fixed

After the temperature = upper (10) carbon, it is maintained at the same time. The temperature of the slain is still about 873K 97; K#^^ has 3 and 1 is more than 90%. 200932676 This phenomenon is caused by dehydrogenation and deoxidation of water and carbon dioxide due to thermal decomposition of the core or outer skin. Further, the bet specific surface area of the obtained carbide at this time was about 20 m 2 /g at a carbonization temperature of about 973 K. Therefore, in the present invention, the carbonization temperature is preferably 673 K or more and 1073 K or less, and more preferably 773 K or more and 973 K or less. From the characteristics described in the fourth figure, the carbonization temperature can be judged for the core of sugar cane

The structural changes in the outer and outer skins have considerable influence. Fig. 5(A) shows an SEM image of the structure of the carbide (specification 1) obtained by carbonizing the core of the bagasse as a raw material at a carbonization temperature of about 973 K. Fig. 5(B) shows an SEM image of a carbide (Specific Example 2) structure obtained by carbonizing at the carbonization temperature of 973 K from the outer skin portion of the bagasse. From the fifth diagram (A), the carbide obtained from the core portion has almost the same shape as the core portion in the state of maintaining the raw material shown in Fig. 3(A). Further, as is understood from the fifth diagram (B), the carbide obtained from the outer skin portion is compared with the material shown in the third diagram (B) (i.e., the portion before the carbonization), although deoxidation due to thermal decomposition can be seen. The part that causes the capillary structure to collapse, but still maintains a state similar to the structure of the raw material. Next, the types of carbides obtained by carbonization of bagasse and other parts are activated by alkali to prepare the above three types of activity. In the sixth figure, the three types of activated carbons, biochemical temperature H) 73K, the specific gravity ratio of the specific gravity of the test (specifically, gas oxidized nano) and the specific surface area and yield are shown. Guan Guan L, Figure 5, 'the effect of f-addition on yield and dirty specific surface area. It can be seen from the figure that 'the activated carbon from the core + outer skin, the core and the outer skin is added. The above three types of carbides are added to the surface of the test. There is an increasing trend. 15 200932676 Further, when the amount of alkali added is 6.0, a BET specific surface area of 3,0 〇〇m 2 /more or more activated carbon can be obtained. The activation temperature (in view of practicality) is preferably 1 〇〇 κ or more and 3 〇〇 κ 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 Therefore, the above-mentioned activation temperature is preferably 823 K or more and 1323 or less, and more preferably 923 K: ^ or 1223 K or less from the viewpoint of usability. λ From the seventh (Α) to the seventh diagrams, SEM images of activated carbon obtained from the core of bagasse (Specific Example 1) are disclosed. The seventh diagram (A) shows a case where the amount of addition is L7 and the BET specific surface area is 9 〇lm 2 /g. Fig. 7 is a condition in which the amount of alkali added is 2·9 and the BET specific surface area is 16951112^. The seventh figure (C) is a case where the amount of alkali added is 3.7 and the BET specific surface area is 2, ll3 m 2 /° -. Further, the seventh figure (D) is a case where the amount of alkali added is 6.5 and the BET ratio is ^, which is 3,120 m 2 /g. As is apparent from the seventh to seventh figures (D), the activated carbon obtained in the core increases the size of the bet which constitutes the activated carbon as the surface of the activated carbon increases as the alkali is activated. In this regard, it is recognized in the eighth figure to the eighth figure ff>) that the δΕΜ image of the activity obtained from the outer skin of bagasse is revealed. The eighth diagram (A) shows a case where the amount of alkali added is 丨〇 and the specific surface area is 889 m 2 /g. The eighth figure (Β) is a condition in which the amount of alkali added is 2.0 and the BET specific surface area is obtained. The eighth figure (c) is a case where the addition amount is 3.0 and the BET specific surface area is 2,030 m 2 /g. Further, Fig. 8(D) shows a case where the amount of alkali added is 6 Å and the BET specific surface area is 3,328 m 2 /g. From Fig. 8(A) to Fig. 8(9), it is known that the activated carbon obtained from the outer epidermis increases with the BET specific surface area due to alkali activation, and although the capillary structure somewhat collapses, it still retains a small size. Capillary construction. The activated carbon obtained from the outer epidermis maintains its capillary structure even if its BET is increased in proportion to the surface 16 200932676. Therefore, in the present invention, from the viewpoint of practicality, the weight ratio of the above-mentioned inhibitor is preferably 4 or more and 9 or less, and more preferably 5 or more and 8 or less. Further, in view of practicality, the present invention preferably has a BET specific surface area of activated carbon of 3, 〇〇〇m2/g or more and 3,500 m2/g or less, and 3,250 m2/g or more and 3,45 〇m2/ The following is better.

In the ninth figure, the gas-gas adsorption isotherm curves of the above three types of activated carbons at 77K are disclosed. The nitrogen adsorption isotherm curve of activated carbon having a specific surface area of more than 3,000 m 2 /g obtained from the above three types of raw materials is classified according to the IUPAC (International Union of Pure and Applied Chemistry) adsorption-desorption isotherm curve. Π type. In the ninth diagram, P is the adsorption equilibrium pressure and Po is the saturated vapor pressure. Table 2 shows the pore media variables calculated by analyzing the nitrogen adsorption isotherms disclosed in Figure 9. As can be seen from Table 2, any of the above three types of activated carbon promotes the development of pores (Mes〇p〇re). Table 2 Addition amount of raw materials (g/g) Total surface area S (m2/g) S (m2/g) Total Vp Vp (cm2/g) Medium pores (cm3/g) Microporous medium core + outer skin (7: 18) 6.2 3343 2606 2.07 0.17 1.85 Core 6.5 3120 2194 2.18 0.03 1.81 External skin 6.0 3328 "丨2353 2.08 0.16 1.73 S . BET specific surface area Vp : pore volume followed by high specific surface area and mesoporous porosity The characteristics of the electric double layer of bagasse activated carbon (i.e., activated carbon obtained from bagasse) are disclosed in the 17th 200932676 ten series to reveal the above three types of active carbon electrodes (specific example 3), respectively; The double layer capacity of the live electric layer obtained from the epidermis. From the outer epidermis, the area of the 匕^ area has a higher ❿10. The highest value of the surface is called the carbon electrode's electric double layer capacity 183F/g, compared to the core or Core + external port 3', when 仏, is about 1〇~2, §. Therefore, in this case, Yu 矣9 private? 190; ^ below is better. Type (in other words, sweet and vegetable The slag is the second largest, the existence of the material. In addition, from the point of view of the acidic characteristics of the activated carbon, it has the highest level of the two layers.

(-〇Hne Exchange CEC = gas value is set by the outer skin = two ==:; There are two knowledge, the activity obtained by the ministry is broken, because the capillary has skin == to promote the activity of the outer epidermis Therefore, it can be determined that in the slag slag, ^ is the main component of the bipolar capacitor of the electric double layer capacitor Φ 200932676. It is also possible to correct and change the implementation of the description in the scope of the patent application. For example, it is formed by the shape of the rectangular shape of the diaphragm 2 and the pair, and the respective collector bodies 5a and 6a are respectively * Μ! However, the collectors 5 and 6 are respectively arranged to be composed of approximately rectangular bodies. The spacer 2, - "polarization; the electrode 3 is nearly rounded and the tube is shaped from the collector body 5a" , 6a each: HI 5 structure: two = 'separating film 2 and a pair: shape configuration, at the same time this separation film 24: re-winding from the length of the crucible to form a rewind body, and then set the electrode 3, 4 The layers are laminated to each other in the two adjacent = 2 nanocells 7. The electrodes that are pulled out are used as the pair of 5&, 6& The above -.% Of the portion of the book collector, said drawing electrode current collector and also a c-shaped configuration, however embodiment thereof 'I body 5a, to a respectively different drawings briefly described [200,932,676]

The first figure is a schematic perspective view of a cross section of the electric double layer capacitor in the embodiment of the present invention applied to an electric double layer capacitor. (Embodiment U) The second drawing is an exploded perspective view of the electric double layer capacitor shown in the first figure, and the state after the storage case is omitted. (Example υ + Third drawing (Α) surface manufacturing _ The polarity of the electrode is made to be strict: the SEM image of the core is found. (Example 1) ❹ 10 # The second figure (B) is the outer skin of the sorghum slag which is made by the polarity electrode shown in the figure. SEM image. (Example J) Figure 4 is a graph showing the carbonization temperature of the outer skin portion of the material used for the production of the polar electrode shown in Fig. - and the yield composition of the carbide. (Example 1) > The fifth figure (4) is the SEM image of the third figure (Α). (Example 丨) The fifth figure (B) is the second picture (B) SEM image of carbon on the outer skin. (Example 1) The H series in (8) is the core of bagasse and the fifth and (4) outer skins shown in Fig. 5(A), and Chart of each part of the epidermis ^ 2 T carbon and brittle specific surface area and yield ί The seventh figure (Α) is the fifth figure (eight) = specific surface area one active sem4 " (= seventh figure (B The system is shown in the fifth figure (A), the specific surface area of the sugar cane hall is activated carbon 20 200932676 1) The seventh figure (c) is shown in the fifth figure (4), by the ginseng core department The SEM image of the active carbon with a BET specific surface area of 2, ll3 m2/g is the second servant of the SEM image of the activated carbon, and the seventh figure (D) of the court is shown in the fifth figure (A), which is obtained from the core of the bagasse, the BET ratio. SEM image of activated carbon with a surface area of 3,120 m2/g. ^ Example 1) y.

The eighth diagram (A) is an SEM image of activated carbon having a BET specific surface area of 889 m 2 /g from the appearance of the slag residue as shown in the fifth diagram (8). . Jin Example 1) ~. (The eighth figure (8) is the SEM image of the activated carbon with a BET specific surface area of !, 682 m2/g from the appearance of the bagasse. The first example (C) is shown in the fifth figure (8). As shown in the fifth diagram (B), the activated carbon having a normal surface area of 2,_m2/g is obtained from Gan, and the first embodiment (D) is shown in the fifth figure (8). From the appearance of the slag residue, the seb with a BET specific surface area of 3,328 m2/g is obtained. Example 1) The ninth figure of the hole is revealed by the core of the Gan ship + the outer skin, each Obtained: ^ Active break, the tenth figure of the 77K atmosphere is revealed by Gan Yanfeng

: A graph showing the relationship between the BET ratio of activated carbon obtained by each of the epidermis and the like and the amount of =. (Embodiment i), electric I 200932676 [Description of main component symbols] 1. Electric double layer capacitor 2. Separator diaphragm 3. Upper side polarity electrode 4. Lower side polarity electrode 5. Upper side collector 6. Lower side collector

7. Storage box

twenty two

Claims (1)

200932676 X. Patent application scope: 1. A method for producing activated carbon, which comprises the steps of: carbonizing a raw material obtained by carbonization from a raw material obtained from kansui or/or inspecting; and obtaining the foregoing carbide by alkali activation treatment The step of activated carbon. 2. The method for producing activated carbon according to claim 1, wherein the raw material is a skin portion obtained by separating the core of the bagasse from the outer skin portion. 3. The method for producing activated carbon according to claim 1 or 2, wherein the BET specific surface area obtained by the alkali activation treatment is in the range of 3,000 to 3,500 m 2 /g. 4. The activated carbon production method according to the first, second or third aspect of the patent application, wherein the carbonization temperature in the carbonization is in the range of 673 to 1,073 K. 5. The activated carbon production method according to any one of claims 1 to 4, wherein the base for alkali activation is an alkali metal hydroxide. 6. The activated carbon production method according to any one of claims 1 to 5, wherein, in the activation of the base, the weight ratio of the base to the carbide is in the range of 4 to 9. 7. The activated carbon production method according to any one of claims 1 to 6, wherein the activation temperature of the alkali activation is in the range of 823 Κ to 1,323 Å. 8. The method for producing activated carbon according to any one of claims 1 to 7, wherein the activation temperature of the alkali activation is higher than the carbonization temperature of the carbonization in the range of 100 K to 300 K. temperature. 9. The activated carbon production method according to any one of claims 1 to 8, wherein the activated carbon is activated carbon for an electric double layer capacitor. 10. A method of manufacturing an electric double layer capacitor comprising: a pair of polarization electrodes; a separator film disposed between the pair of polar electrodes; and a pair of episodes connected to the pair of polar electrodes The electrode and the electrolyte in contact with the opposite polarity electrode are characterized in that: at least one of the polar electrodes has a main component of activated carbon; and the activated carbon is obtained from the bagasse The step of obtaining a carbide by carbonization, and the step of treating the above-mentioned carbide with an alkali activation treatment. 11. The method of producing an electric double layer capacitor according to claim 10, wherein the raw material is a skin portion obtained by separating the sturdy core portion from the outer portion Φ portion. 12. The method of manufacturing an electric double layer capacitor according to claim 10, wherein the electric double layer capacitance of the activated carbon is in the range of 170 to 195 F/g. 13. The method for producing an electric double layer capacitor according to claim 10, wherein the alkali activation catalyst is a metal oxide. twenty four