1353398 九、發明說明： 【發明所屬之技術領域】 本發明係關於燃料電池’更特別關於燃料電池中之氣 體擴散層與其形成方法。 【先前技術】 請參照第1圖，燃料電池(fuel cell，以下簡稱FC)是由1353398 IX. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a fuel cell' more particularly to a gas diffusion layer in a fuel cell and a method of forming the same. [Prior Art] Please refer to Figure 1. The fuel cell (hereinafter referred to as FC) is composed of
一質子傳導膜11夾於兩塊觸媒層13、氣體擴散層15、雙 極板 17 (bipolar plate)、集電板 18 (current collector)、與端 板19 (end plate)間所組成。質子傳導膜η分隔之兩邊分屬 陽極（氫氣或重組氣體或曱醇)與陰極(氧氣或空氣陽極進 行氧化反應’陰極進行還原反應，當陽極之氫氣（或甲醇） 接觸到陽極觸媒13(—般為白金或白金合金）時，會解離成 為質子及電子，其中電子會經由銜接陽極與陰極之電橋、 與電橋串接之裝置16 ’自陽極游往陰極，質子則直接自陽 極穿越薄膜電極組11到達陰極’特別強調的是此質子傳導 膜11為含濕性之薄膜，僅容許質子伴隨水分子穿越，而其 他氣體分子均無法穿越。陰極端在觸媒的作用下，經由電 橋到達之電子與氧結合成氧離子’與穿越質子傳導膜 之質子合成形成水分子’此即電化學氧化與還原反應^ I電系統具有效 串聯提高電橋電 應用電化學反應使PEMFC或DMFC 率高、無污染、反應快等特性，並可藉由 1353398 壓或增加電減應面積以提高電流量’特別是在源源不斷 的氧氣（通常使用空氣)供給下，可持續提供電力供給裝置 16的需求。在這樣的特點下，燃料電池除了可作為小型系 統電力，亦可設計成為大型電廠、分散式電力及^移動電 力。 大部份形成氣體擴散層基板的方法為抄紙製程，包含 形成碳纖維紙後浸入熱塑性樹脂，接著熱壓處理後再熱1 化上述紙片，最後裁切成適當大小。在jP〇6 2〇71()a、 JP07-32362A、及JP07-220735A中的燃料電池其氣體擴散 層之形成方法為$反化樹脂黏合碳纖維。然而上述方法繁 複，增加生產成本並降低電池效能。 美國專利公開號US 2005100498揭露以有機高分子化 合物黏合不同微米級直徑及毫米級長度之短碳纖維形成碳 紙，其碳纖含量佔重量百分比40%以上。此碳紙含浸熱塑 型樹酯經熱壓處理後，于1600至2000°C之惰性氣體下加 φ 熱製成多孔碳電極。其碳纖維直徑介於4至7微米，碳纖 維長度為3-6毫米，其總體密度(bulk density)介於〇.3至 〇.8g/cm3，其碳纖維穿透電阻率小於10mn，cm2 ’其透氣度 為350至6000 cm3/cm2/hr/mmAq。由於其切短之碳纖維以 PVA纖維黏合後含浸於酚醛樹脂，接著碳化成碳紙，因此 紙質較硬。此外，此專利之加工程序多且碳化溫度高 (2000°〇 〇 在中國專利第CN 1417879號中，揭露了以不同微米級 直徑與毫米級長度之短碳纖維作為造紙紙漿原料，其含量 1353398 佔重量百分比96%至99°/(^接著以傳統抄紙法形成紙後作 為燃料電池的氣體擴散層。其碳纖維之長度介於0.5至 5mm之間，基重為50至15〇g/m2，碳纖維體積電阻小於 20πιΩ · cm ;碳紙體積電阻小於65ιηΩ · cm。 綜上所述’本發明以新的方法製備氣體擴散層可簡化 生產步驟及降低生產成本。 【發明内容】The proton conductive film 11 is sandwiched between two catalyst layers 13, a gas diffusion layer 15, a bipolar plate, a current collector 18, and an end plate 19. The two sides of the proton conducting membrane η are separated by an anode (hydrogen or a reformed gas or decyl alcohol) and a cathode (oxidation reaction of oxygen or an air anode) to reduce the cathode, when the hydrogen (or methanol) of the anode contacts the anode catalyst 13 ( When it is platinum or platinum alloy, it will dissociate into protons and electrons. The electrons will travel from the anode to the cathode through the bridge connecting the anode and the cathode, and the bridge connected to the bridge. The protons pass directly from the anode. The thin film electrode group 11 reaches the cathode. It is particularly emphasized that the proton conducting membrane 11 is a moisture-containing film, which only allows protons to pass through with water molecules, and other gas molecules cannot pass through. The cathode end is driven by the catalyst. The electrons of the bridge reach the oxygen and combine with oxygen to form a water molecule with the protons that pass through the proton conducting membrane. This is the electrochemical oxidation and reduction reaction. The electrical system has an effect in series to improve the electrochemical reaction of the bridge. The PEMFC or DMFC is used. High rate, no pollution, fast response, etc., and can increase the current amount by 1353398 pressure or increase the electric reduction area' especially when the source is not The supply of oxygen (usually using air) can continuously provide the demand for the power supply device 16. Under such characteristics, the fuel cell can be designed as a large-scale power plant, distributed power, and mobile power, in addition to being a small system power. Most of the methods for forming the gas diffusion layer substrate are a papermaking process, which comprises forming a carbon fiber paper and then immersing it in a thermoplastic resin, followed by hot pressing to heat the paper, and finally cutting it into an appropriate size. At jP〇6 2〇71 ( The method for forming a gas diffusion layer of a fuel cell in a, JP 07-32362A, and JP 07-220735A is a reversible resin bonded carbon fiber. However, the above method is complicated, increasing production cost and reducing battery efficiency. US Patent Publication No. US 2005100498 discloses The carbon fiber is formed by the organic polymer compound bonding short carbon fibers of different micron diameter and millimeter length, and the carbon fiber content is more than 40% by weight. The carbon paper impregnated thermoplastic resin is subjected to hot pressing treatment at 1600 to 2000. A porous carbon electrode is formed by adding φ heat under an inert gas of ° C. The carbon fiber diameter is 4 to 7 μm and the carbon fiber is long. It is 3-6 mm, its bulk density is between 〇.3 and 〇.8g/cm3, its carbon fiber penetration resistivity is less than 10mn, and its air permeability is 350 to 6000 cm3/cm2/hr/mmAq. Because the short carbon fiber is impregnated with PVA fiber and then impregnated with phenolic resin, and then carbonized into carbon paper, the paper is hard. In addition, this patent has many processing procedures and high carbonization temperature (2000 ° 〇〇 in Chinese patent CN) In 1417879, short carbon fibers with different micron diameters and millimeter lengths are disclosed as raw materials for papermaking pulp, the content of which is 1353398% by weight of 96% to 99°/(^, then the paper is used as a fuel cell after forming paper by conventional papermaking method. Diffusion layer. The carbon fiber has a length of between 0.5 and 5 mm, a basis weight of 50 to 15 〇g/m 2 , a carbon fiber volume resistance of less than 20 π Ω · cm, and a carbon paper volume resistance of less than 65 ηη Ω · cm. In summary, the present invention produces a gas diffusion layer in a novel manner, which simplifies the production steps and reduces the production cost. [Summary of the Invention]
本發明提供一種形成奈米碳纖的方法，包括提供聚丙 烯腈溶液；紡絲聚丙烯腈溶液以形成複數條奈米纖維；熱 氧化奈米纖維以形成奈米氧纖；以及碳化奈米氧纖以形成 奈米碳纖，其中奈米碳纖疊合成網狀。 本發明亦提供一種形成燃料電池方法，包括提供質子 傳導膜；依序形成觸媒層、氣體擴散層、雙極板、集電板、 以及端板於質子傳導膜之兩側，即形成燃料電池:、其中氣 體擴散層包括上述形成奈米碳纖的方法。 本發明亦提供-種奈米後纖，疊合成網&，其直徑介 於100至800腿之間，且平均纖維直徑介於2〇〇 ^ 6〇〇腿 之間。 本發明更提供一種燃料電池包括質子傳導膜炎設於兩 其中質子傳導膜與端板之間依序為觸媒層、氣體 雙極板、以及集電板；其中氣體擴散層包括上述 之不米纖。 【實施方式】 本發明提供一種形成奈#碳纖的方法。首先，將聚丙 稀猜/谷於極性溶劑以形成聚丙烯腈溶液。聚丙烯腈之來源 可為自行合成或市售產品之聚丙烯腈共聚物，分子量介於 150000至3〇〇〇〇〇之間。適用於溶解聚丙烯腈之有機溶劑 可為N，N-二甲基曱醯胺、二甲基乙胺、二曱基亞颯， 其濃度約介於5wt°/〇至30wt°/。之間。 紡#接者以紡絲上述聚丙烯腈溶液形成複數條奈米纖維。 電题、法可為放電紡絲法或料喷絲法。放電紡絲法之施加 '為2:0至50kv ’而溶液噴絲法之紡嘴氣體壓力介於 纖g/cm2。越強之*加電壓及紡嘴氣體壓力所形成的奈米 越‘越細而越低濃度之聚㈣腈溶液所形成的奈米纖維 纖雜士值传注意的是，奈錢維係叠合而非交織成網狀， ^直#介於L 800nm之間，且平均纖維直徑介於2〇〇 主6〇〇nm之間。 月旨。ΐί形成之奈米纖維可進一步(非必要)含浸祕樹 氣化述之奈米纖維’使其形成奈米氧纖。熱 歸腈^ 氛 細^ 3〇代的温度氧化聚丙 使其形成奈米氧纖。若奈米纖維在熱氧彳卜乂 p人， 之酚醛樹脂’此熱氧化步驟亦會氧化酚醛樹、脂。則3度 程儀米:纖使其形成奈米碳纖。碳化製 900至1500 Γ?:1ΤΖ用微波或傳統熱源如高溫爐以 圖係本Μ 使其錢成Μ碳纖。第2 係林Γ 施 奈米碳纖之上視圖。第3圖 發月-貫施例中，網狀奈米碳纖之側視圖 1353398 維在熱氧化前已含浸祕_脂，此魏㈣將會碳化齡 酸樹脂氧化物。The invention provides a method for forming nano carbon fiber, comprising providing a polyacrylonitrile solution; spinning a polyacrylonitrile solution to form a plurality of nanofibers; thermally oxidizing the nanofiber to form a nanofiber; and carbonizing the nanofiber To form nano carbon fiber, wherein the nano carbon fiber is laminated into a network. The invention also provides a method for forming a fuel cell, comprising providing a proton conducting membrane; sequentially forming a catalyst layer, a gas diffusion layer, a bipolar plate, a collector plate, and an end plate on both sides of the proton conducting membrane, thereby forming a fuel cell : wherein the gas diffusion layer comprises the above method of forming nano carbon fibers. The present invention also provides a nanofiber, a composite web & a diameter between 100 and 800 legs and an average fiber diameter of between 2 〇〇 ^ 6 〇〇 legs. The invention further provides a fuel cell comprising proton conducting membrane inflammation disposed between two proton conducting membranes and an end plate, which are sequentially a catalyst layer, a gas bipolar plate, and a current collecting plate; wherein the gas diffusion layer comprises the above-mentioned non-meter Fiber. [Embodiment] The present invention provides a method of forming a carbon fiber. First, the polypropylene is guessed/cold in a polar solvent to form a polyacrylonitrile solution. The source of polyacrylonitrile may be a polyacrylonitrile copolymer of a self-synthesized or commercially available product having a molecular weight of between 150,000 and 3 Torr. The organic solvent suitable for dissolving the polyacrylonitrile may be N,N-dimethylguanamine, dimethylethylamine or dimercaptoarylene, and its concentration is about 5 wt/〇 to 30 wt/. between. The spinning #spun is formed by spinning the above polyacrylonitrile solution to form a plurality of nanofibers. The electric problem and the method may be a discharge spinning method or a material spinning method. The application of the discharge spinning method was '2:0 to 50 kV' and the nozzle gas pressure of the solution spinning method was between g/cm2. The stronger the *added voltage and the gas pressure generated by the nozzle gas pressure, the finer and lower the concentration of the nano-fiber nitrile solution formed by the nitrile solution, the attention is paid. Instead of interlacing into a mesh, ^ straight# is between L 800 nm, and the average fiber diameter is between 2 〇〇 main 6 〇〇 nm. The purpose of the month. The nanofibers formed by ΐί can further (optionally) impregnate the secret fibers of the nanofibers to form nanofibers. Heat to nitrile ^ atmosphere fine ^ 3 generation of temperature oxidation of polypropylene to form nano-oxygen fiber. If the nanofiber is in the thermal oxygen, the phenolic resin will also oxidize the phenolic tree and the fat. Then 3 degrees meter: fiber to form nano carbon fiber. Carbonization 900 to 1500 Γ?: 1 ΤΖ Use microwave or traditional heat source such as high temperature furnace to make it into carbon fiber. The second line of forests is a view of the top carbon fiber. Figure 3 The side view of the net-like nano-carbon fiber in the month-to-month application, the 1353398 dimension has been impregnated with _ lipid before thermal oxidation, and this Wei (four) will carbonize the age of acid resin oxide.
上述奈米碳纖之長徑比大於1000，碳纖維直徑介於 100至800謹之間，且平均纖維直徑介於2〇〇至_胆之 間。上述奈米碳纖表面電阻率小於m/cm2 W)，體積電阻率小於2mf} · cm(可低達】68mQ㈣， 總體密度介於0.27至〇.35g/cm3，透氣值介於17至 20cm3/Cm2/Sec ’且基重介於2〇至5〇g/m2。由於本發明之 網狀疊合的奈米碳纖厚度薄、堆疊密度小，且具柔軟性， 非常適合作為燃料電池之氣體擴散層。 值得/主意的Τξ：在熱氧化前是否有含浸過酴盤樹 脂’其形成之奈米纖維均為·%碳材，可直接作為氣體擴 散層；也可與其他m網複合作為氣軸散層使用。 上述之氣體擴散層15可應用於第1圖所示之燃料電 池在第1圖中’質子傳導膜11夾於兩塊觸媒層13、氣 體擴散層15、本發明之雙極板17、集電板18 (current collector)、與端板 19(endplate)間所組成。 為了讓本發明之上述和其他目的、特徵、和優點能更 明顯易懂，下文縣數實_作詳細說明如下： 【實施例】 實施例1 取13g聚丙稀腈（購自東華合纖）溶於87g DMAc中， 形成聚丙稀腈高分子溶液。利用放電紡絲法紡絲，並施加 電壓為39.5KV ’形成網狀之奈米纖維，其直獲介於至 1353398 700nm。將上述之奈米纖維置於氧氣中，以270°C加熱180 分鐘，即得奈米氧纖。將上述之奈米氧纖置於氮氣中，以 1000°C碳化奈米氧纖，製成奈米碳纖，其表面電阻率為 3.29Q/cm2，體積電阻率為 0.16Ω·οπι。 實施例2 與實施例1類似，差別在於氧化奈米纖維之溫度。將 實施例1中紡絲形成之奈米纖維置於氧氣中，以280°C加 熱180分鐘，即得奈米氧纖。後續碳化奈米氧纖之條件相 同，所得之奈米碳纖其表面電阻率為4.34Q/cm2,體積電阻 率為 0.14Ω·αη。 實施例3 與實施例2類似，差別在於碳化奈米氧纖之方法。以 9kW之微波碳化實施例2中之奈米氧纖，所得之奈米碳纖 其表面電阻率為1.42Q/cm2，體積電阻率為0.29Ω·οιη。 實施例4 取17g聚丙烯腈（購自東華合纖)溶於83g DMAc中， 形成聚丙烯腈高分子溶液。利用喷嘴氣體壓力為1.5kg/cm2 之溶液噴絲法，形成網狀之奈米纖維，其直徑介於700至 lOOOnm。將上述之奈米纖維置於氧氣中，以280°C處理180 分鐘，即得奈米氧纖。將上述之奈米氧纖置於氮氣中，以 1000°C碳化奈米氧纖，製成奈米碳纖，其表面電阻率為 8.68D/cm2，體積電阻率為 0·08Ω·οιη。 實施例5 與實施例4類似，差別在於碳化奈米氧纖之方法。以 10 1353398 9kW之微波碳化實施例4中之奈米氧纖，所得之奈米碳纖 其表面電阻率為0.32D/cm2 ’體積電阻率為〇.〇2Ω·αη。 實施例6 與實施例4類似’差別在於在熱氧化紡絲後之奈米纖 維前’先將奈米纖維含浸於酚醛樹脂（購自長春樹酯）。後 續熱氧化及碳化步驟均與實施例4相同，形成之奈米碳纖 其表面電阻率為6.54Q/cm2，體積電阻率為〇.〇5Q.cm。 • 貫施例7 與實施例6類似，差別在於氧化奈米纖維之溫度以260 C處理180分鐘。後續碳化奈米氧纖之條件相同，所得之 奈米碳纖其表面電阻率為8.14Q/cm2’體積電阻率為〇.〇9Ω •cm 〇 實施例8 與實施例6類似，差別在於氧化奈米纖維之溫度以270 C處理180分鐘。後續碳化奈米氧纖之條件相同，所得之 # 奈米碳纖其表面電阻率為6·37Ω/αη2，體積電阻率為〇.〇9Ω •cm 〇 實施例9 與實施例6類似’差別在於氧化奈米纖維之溫度以290 C處理180分鐘，即得奈米氧纖。後續碳化奈米氧纖之條 件相同’所得之奈米碳纖其表面電阻率為9.i8Q/cm2,體積 電阻率為0.13Ω.cm。 上述實施例1-9之物性整理列表如表一所示： 1353398 表一 實施例 含浸驗 醛樹脂 氧化溫 度 碳化溫度或 微波功率 表面電阻 率(Ω/cm2) 體積電阻 率（Ω·αη) 1 無 270〇C 1000°C 3.29 0.16 2 無 280cC 1000。。 4.34 0.14 3 無 280〇C 9kW 1.42 0.29 4 無 280〇C 1000°C 8.68 0.08 5 無 280〇C 9kW 0.32 0.02 6 有 280〇C 1000°C 6.54 0.05 7 有 260〇C 1000°C 8.14 0.09 8 有 270〇C 1000°C 6.37 0.09 9 有 290〇C 1000°C 9.18 0.13 實施例10 與實施例3類似，差別在於將實施例8之奈米纖維及 一般碳纖維複合，再以9kW微波碳化條件進行碳化。 實施例11 (燃料電池測試） 將實施例6-10與比較例1 Toray 030及比較例2 Toray060之試片裁切為5cm*5cm大小後，與購自杜邦公司 _ 之觸媒層（catalyst coated membrane，CCM)三層 MEA 組 合，封入燃料電池測試模組，以Teflon墊片確認氣密後， 進行燃料電池測試。 陽極端的氣體(H2)流速為0.3stpm，而陰極端的氣體(02) 流速為0.3slpm，測試溫度定為60°C。在負載0.3V電流密 度量測結果如後：實施例6電流密度1442 mA/cm2 ;實施 例7電流密度1292 mA/cm2;實施例8電流密度1577 mA/cm2 ;實施例9電流密度1289 mA/cm2 ;實施例10電 流密度1195 mA/cm2 ;比較例1電流密度1850 mA/cm2 ; 12 1353398 比較例2電流密度15 73 mA/cm2。 取實施例8、市售商品Toray030、Toray060 (購自The above carbon fiber has an aspect ratio of more than 1000, a carbon fiber diameter of between 100 and 800 cm, and an average fiber diameter of between 2 Å and _ biliary. The above surface carbon nanotubes have a surface resistivity of less than m/cm2 W), a volume resistivity of less than 2 mf} · cm (as low as 68 mQ (iv), an overall density of 0.27 to 35.35 g/cm 3 , and a gas permeability of 17 to 20 cm 3 /cm 2 . /Sec ' and the basis weight is between 2〇 and 5〇g/m2. Since the mesh-like nano carbon fiber of the present invention has a thin thickness, a small stack density, and flexibility, it is very suitable as a gas diffusion layer for a fuel cell.值得 / 值得 Τξ 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得 值得The above-mentioned gas diffusion layer 15 can be applied to the fuel cell shown in Fig. 1 in Fig. 1 where the 'proton conductive film 11 is sandwiched between the two catalyst layers 13, the gas diffusion layer 15, and the bipolar plate of the present invention. 17. The current collector 18 is formed between the current collector and the end plate 19. To make the above and other objects, features, and advantages of the present invention more comprehensible, the following is a detailed description. The following are the following: [Examples] Example 1 13 g of polyacrylonitrile (purchased from Donghua Synthetic Fiber) Dissolved in 87g DMAc to form a polyacrylonitrile polymer solution. Spinning by electric discharge spinning, and applying a voltage of 39.5KV 'to form a network of nanofibers, which is directly obtained to 1353398 700nm. The nanofiber is placed in oxygen and heated at 270 ° C for 180 minutes to obtain nanometer oxygen fiber. The above nanometer oxygen fiber is placed in nitrogen gas to carbonize the nanometer oxygen fiber at 1000 ° C to prepare nano carbon fiber. The surface resistivity was 3.29 Q/cm 2 and the volume resistivity was 0.16 Ω·οπι. Example 2 Similar to Example 1, the difference was in the temperature of the oxidized nanofibers. The nanofibers formed by spinning in Example 1 It is placed in oxygen and heated at 280 ° C for 180 minutes to obtain nanometer oxygen fiber. The conditions of the subsequent carbonized nanofiber are the same, and the obtained nano carbon fiber has a surface resistivity of 4.34 Q/cm 2 and a volume resistivity of 0.14. Ω·αη. Example 3 Similar to Example 2, the difference lies in the method of carbonizing nanofibers. The nanofiber of Example 2 was carbonized with a microwave of 9 kW, and the surface carbon resistivity of the obtained nano carbon fiber was 1.42Q. /cm2, the volume resistivity is 0.29 Ω · οιη. Example 4 Take 17g of polypropylene The acrylonitrile (purchased from Donghua Hefei) was dissolved in 83g DMAc to form a polyacrylonitrile polymer solution. The solution was sprayed by a nozzle gas pressure of 1.5kg/cm2 to form a network of nanofibers with a diameter ranging between 700 to 100 nm. The above-mentioned nanofibers are placed in oxygen and treated at 280 ° C for 180 minutes to obtain nano-oxygen fibers. The above-mentioned nano-oxygen fibers are placed in nitrogen to carbonize nano-carbon at 1000 ° C. The fiber is made of nano carbon fiber, and its surface resistivity is 8.68 D/cm 2 , and the volume resistivity is 0·08 Ω·οιη. Example 5 Similar to Example 4, the difference lies in the method of carbonizing nanofibers. The nanofiber of Example 4 was carbonized with a microwave of 10 1353398 9 kW, and the obtained nano carbon fiber had a surface resistivity of 0.32 D/cm 2 '. The volume resistivity was 〇.〇2 Ω·αη. Example 6 is similar to Example 4 'The difference is that the nanofibers are first impregnated with a phenolic resin (purchased from a viniferyl ester) before the thermal oxidization of the nanofibers. The subsequent thermal oxidation and carbonization steps were the same as in Example 4. The surface carbon nanotubes formed had a surface resistivity of 6.54 Q/cm 2 and a volume resistivity of 〇.〇5 Q.cm. • Example 7 is similar to Example 6 except that the temperature of the oxidized nanofibers is treated at 260 C for 180 minutes. The conditions of the subsequent carbonized nanofibers were the same, and the obtained nano carbon fiber had a surface resistivity of 8.14 Q/cm 2 'the volume resistivity was 〇 9 • • cm 〇 Example 8 is similar to Example 6, except that the oxidized nano The temperature of the fibers was treated at 270 C for 180 minutes. The conditions of the subsequent carbonized nanofibers were the same, and the obtained #nano carbon fiber had a surface resistivity of 6.37 Ω/αη2 and a volume resistivity of 〇.〇9 Ω • cm. Example 9 is similar to Example 6 'the difference is oxidation. The temperature of the nanofibers was treated at 290 C for 180 minutes to obtain nanofibers. The conditions of the subsequent carbonized nanofibers were the same. The obtained nano carbon fibers had a surface resistivity of 9.i8 Q/cm2 and a volume resistivity of 0.13 Ω·cm. The physical property finishing list of the above Examples 1-9 is shown in Table 1: 1353398 Table 1 Example Immersion test aldehyde resin oxidation temperature carbonization temperature or microwave power surface resistivity (Ω/cm2) volume resistivity (Ω·αη) 1 270〇C 1000°C 3.29 0.16 2 No 280cC 1000. . 4.34 0.14 3 No 280〇C 9kW 1.42 0.29 4 No 280〇C 1000°C 8.68 0.08 5 No 280〇C 9kW 0.32 0.02 6 280〇C 1000°C 6.54 0.05 7 There are 260〇C 1000°C 8.14 0.09 8 Yes 270〇C 1000°C 6.37 0.09 9 290〇C 1000°C 9.18 0.13 Example 10 Similar to Example 3, the difference is that the nanofiber of Example 8 is combined with general carbon fiber and carbonized by 9 kW microwave carbonization conditions. . Example 11 (Fuel cell test) The test pieces of Examples 6-10 and Comparative Example 1 Toray 030 and Comparative Example 2 Toray 060 were cut into 5 cm * 5 cm size, and then contacted with a catalyst layer purchased from DuPont. Membrane, CCM) Three-layer MEA combination, sealed into the fuel cell test module, and confirmed by the Teflon gasket after airtightness, fuel cell test. The gas (H2) flow rate at the anode end was 0.3 stpm, and the gas (02) flow rate at the cathode end was 0.3 slpm, and the test temperature was set at 60 °C. The current density measurement results at a load of 0.3 V were as follows: Example 6 current density 1442 mA/cm2; Example 7 current density 1292 mA/cm2; Example 8 current density 1577 mA/cm2; Example 9 current density 1289 mA/ Cm2; Example 10 current density 1195 mA/cm2; Comparative Example 1 current density 1850 mA/cm2; 12 1353398 Comparative Example 2 Current density 15 73 mA/cm2. Take Example 8, commercially available products Toray030, Toray060 (purchased from
Toray)、及W0S1OO2 (講自碳能科技)之電位·電流密度及功 率密度-電流密度曲線分別如第4-5圖所示。本發明的電流 密度與商品值接近。 雖然本發明已以數個實施例揭露如上，然其並非用以The potential, current density, and power density-current density curves of Toray) and W0S1OO2 (from Carbon Energy Technology) are shown in Figure 4-5. The current density of the present invention is close to the commercial value. Although the invention has been disclosed above in several embodiments, it is not intended to
S何所屬技術領域中具有通常知識者，在不 脫離本發月之精神和範_，當 因此本發明之侔嗜& 饮心之更動與潤飾， 為準。發以保€_當視賴之申請專利範圍所界定者 1353398 【圖式簡單說明】 第1圖係習知之燃料電池剖面圖； 第2圖係本發明一實施例中，網狀奈米碳纖之上視圖； 第3圖係本發明一實施例中，多層疊合奈米碳纖之側 視圖； 第4圖係本發明實施例8之奈米碳纖與市售商品之電 位-電流密度比較圖；以及 • 第5圖係本發明實施例8之奈米碳纖與市售商品之功 率密度-電流密度比較圖。 【主要元件符號說明】 11〜質子傳導膜； 13〜觸媒層； 15〜氣體擴散層； 16〜裝置； 鲁 I7〜雙極板； 18〜集電板； 19〜端板。S whoever has the usual knowledge in the technical field, without departing from the spirit and scope of this month, is therefore subject to the changes and refinements of the invention. 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 3 is a side view of a multi-layered carbon nanofiber according to an embodiment of the present invention; and FIG. 4 is a comparison diagram of a potential-current density of a nanocarbon fiber according to Embodiment 8 of the present invention and a commercially available product; • Fig. 5 is a graph showing a comparison of power density-current density of nanocarbon fibers of the eighth embodiment of the present invention and commercially available products. [Main component symbol description] 11~proton conductive film; 13~ catalyst layer; 15~ gas diffusion layer; 16~ device; Lu I7~ bipolar plate; 18~ collector plate; 19~ end plate.