1342081 (1) 九、發明說明 1 【發明所屬之技術領域】 本發明係關於燃料電池或搭載燃料電池之電子機器之 搬送及保管時所使用之容器。 【先前技術】 近年，隨著電子技術的進步，電子機器之小型化、高 性能化、可攜帶化日益發展，攜帶用電子機器中，亦更要 求所使用電池之高能量密度化。因此，要求既輕量且小型 之高容量的二次電池。 針對諸如此類二次電池之要求，例如開發鋰離子二次 電池。此外，攜帶電子機器之操作時間，有再增加之傾向 ，鋰離子二次電池中，自材料之觀點及構造之觀點來看能 量密度之提高亦近乎達到極限，因而漸漸無法滿足額外之 要求。 基於如此之狀況，取代鋰離子二次電池，小型燃料電 池備受矚目。特別是將甲醇作爲燃料使用之直接甲醇型燃 料電池（DMFC )，與使用氫氣之燃料電池相比，無處理 氫氣之困難度，且無需改變有機燃料產出氫氣之裝置等， 因而利於小型化。 特許第34 1 3 1 1 1號及國際公開W02005/1 1 2 1 72A 1，係 各自關於使如甲醛之液體燃料氣化之氣化燃料於陽極供給 之內部氣化型燃料電池。特許第3 4 1 3 1 1 1號所記載之內部 氣化型DMFC，係因具有保持液體燃料之燃料浸透層，及 -5- (2) 1342081 •V* 燃料浸透層中所保持之液體燃料之中使氣化成分擴散之燃 、1 料氣化層，氣化之液體燃料自燃料氣化層供給予燃料極。 特許第3413111號中，使用甲醛及水以1:1之莫耳比混合 之甲醛水溶液作爲液體燃料’甲醒及水雙方以氣化氣體之 形態供給予燃料極。另—方面，國際公開 W〇2005/ 112172A1中，藉由經發電反應於陰極所生成之水，通過 質子傳導性膜供給予陽極’旨在增加液體燃料之甲醛濃度 > 時提高輸出特性。 前述特許第3413111號或國際公開W02005/112172A1 所記載之燃料電池，雖能得到小型且高輸出密度之物，藉 , 由作爲燃料電池單體或搭載燃料電池之搭載燃料電池之電 子機器，因爲出貨及於市場上流通等而進行搬送及保管時 輸出特性有降低之疑慮。 【發明內容】 〔本發明所欲解決之課題〕 本發明之目的，係提供一種可抑制經搬送及保管等之 輸出特性之降低的收容燃料電池之容器、收容搭載燃料電 池之電子機器的容器及附容器之燃料電池。 本發明相關之收容燃料電池之容器，係具有通氣孔。 本發明之收容搭載燃料電池之電子機器的容器，係具 有通氣孔。 本發明之關於附容器之燃料電池，係具備前述收容燃 料電池之容器、及前述收容燃料電池之容器內所收容之燃 -6- (6) 1342081 . 作爲陰極觸媒層6a、陽極觸媒層7a及質子傳導性之1342081 (1) EMBODIMENT OF THE INVENTION 1. Field of the Invention The present invention relates to a container used for transporting and storing a fuel cell or an electronic device equipped with a fuel cell. [Prior Art] In recent years, with the advancement of electronic technology, the miniaturization, high performance, and portability of electronic devices have been increasing, and in portable electronic devices, the high energy density of batteries used has been required. Therefore, a secondary battery having a high capacity and a small capacity is required. For the requirements of such secondary batteries, for example, lithium ion secondary batteries have been developed. In addition, the operation time of carrying an electronic device tends to increase. In the lithium ion secondary battery, the increase in energy density is almost at the limit from the viewpoint of material and structure, and thus the additional requirements are gradually unsatisfactory. Based on such a situation, in place of lithium ion secondary batteries, small fuel batteries have attracted attention. In particular, a direct methanol type fuel cell (DMFC) using methanol as a fuel has a difficulty in handling hydrogen gas compared with a fuel cell using hydrogen gas, and it is not necessary to change a device for producing hydrogen gas from an organic fuel, and thus it is advantageous in miniaturization. Japanese Patent No. 34 1 3 1 1 1 and International Publication WO2005/1 1 2 1 72A 1 are internal gasification fuel cells for supplying a vaporized fuel for vaporizing a liquid fuel such as formaldehyde to an anode. The internal gasification type DMFC described in No. 3 4 1 3 1 1 1 is a liquid fuel layer maintained in a fuel permeation layer maintained by a liquid fuel and a -5- (2) 1342081 • V* fuel soaking layer. Among them, the fuel gas which diffuses the gasification component and the gasification layer of the gasification gas are supplied from the fuel gasification layer to the fuel electrode. In No. 3413111, a formaldehyde aqueous solution in which formaldehyde and water are mixed at a molar ratio of 1:1 is used as a liquid fuel. Both the wake-up and the water are supplied to the fuel electrode in the form of a gasification gas. On the other hand, in International Publication No. 2005/112172A1, the water produced by the reaction of the cathode is supplied to the anode through the proton conductive membrane to increase the formaldehyde concentration of the liquid fuel > The fuel cell described in the above-mentioned Japanese Patent No. 3413111 or International Publication No. WO2005/112172A1 can obtain a small and high output density, and is used as an electronic device equipped with a fuel cell as a fuel cell or a fuel cell. There is a concern that the output characteristics are degraded when the goods are transported and stored in the market. [Problems to be Solved by the Invention] An object of the present invention is to provide a container for accommodating a fuel cell and a container for accommodating an electronic device on which the fuel cell is mounted, which can suppress a decrease in output characteristics such as transport and storage. A fuel cell with a container. A container for accommodating a fuel cell according to the present invention has a vent hole. The container for storing an electronic device equipped with a fuel cell according to the present invention has a vent hole. The fuel cell with a container according to the present invention includes the container for accommodating the fuel cell and the fuel contained in the container for accommodating the fuel cell. 6-(6) 1342081. The cathode catalyst layer 6a and the anode catalyst layer are provided. 7a and proton conductivity
I 電解質膜8中所含之質子傳導性材料，亦可使用如氟碳磺 '4. 酸類之具磺酸基之氟系樹脂、具磺酸之碳氫系樹脂、鎢酸 及磷鎢酸等之無機物等。 陰極觸媒層6a係層合於陽極氣體擴散層6b中，且陽 極觸媒層7a係於陽極氣體擴散層7b中層合。陰極氣體擴 散層6b具於陰極觸媒6a均一供給氧化劑氣體之作用。另 —方面’陽極氣體擴散層7b具於陽極觸媒7a均一供給燃 料之作用。陰極氣體擴散層6b及陽極氣體擴散層7b中， 可使用如多孔質石墨紙。 作爲陽極集電部之陽極導電層9，層合於膜電極組5 之陽極氣體擴散層7b中。另一方面，作爲陰極集電部之 陰極導電層10，層合於膜電極組5之陰極氣體擴散層6b 中。陽極導電層9及陰極導電層10，係使陰極及陽極之導 電性提升之物。此外，陽極導電層9及陰極導電層10中 ’因爲氧化劑氣體或氣化燃料會透過因而有氣體透過孔（ 無圖示）開口。陽極導電層9及陰極導電層10中，例如 PET基材中可使用承載Au箔之金電極。 矩形框狀之密封材之一側1 1 a，係於質子傳導性電解 質膜8上猶如環繞陰極之周圍形成。此外，另一側lib， 係於質子傳導性電解質膜8之相反側之面上猶如環繞陰極 之周圍形成。密封材11a、lib具有防止自膜電極組5之 燃料洩漏及氧化劑氣體洩漏之墊圈（O-ring)功能。 膜電極組5之陽極側（圖2膜電極組5之下方）中， -10- (9) (9)1342081 狀物加壓後提高其密著性之效果，由例如s U S 3 0 4、碳鋼 、不鏽鋼、合金鋼、鈦合金、鎳合金之金屬所形成。 液體燃料槽12內之液體燃料13，係其氣化成分通過 氣液分離膜14後供給予陽極觸媒層7a。陽極觸媒層7a中 ，藉由燃料之氧化反應生成質子（H+ )及電子（e-)。例 如，使用甲醛作爲燃料時，於陽極觸媒層7a所產生之觸 媒反應如下述（1 )式所示。 CH3〇H + H2〇-^C02 + 6H + + 6e' (1) 陽極觸媒層7a生成之質子（H+)，係通過質子傳導 性膜8後向陰極觸媒層6a擴散。此外，同時陽極觸媒層 7a生成之電子，於燃料電池流向接續之外部回路，對於外 部回路之負荷（抵抗等）作用，流入陰極觸媒層6a。 空氣等之氧化劑氣體，係自外裝容器4之空氣導入口 18通過保濕板17、框15b內之空間、陰極導電層10及陰 極氣體擴散層6b後供給予陰極觸媒層6a。氧化劑氣體中 之氧氣，係與通過質子傳導性膜8後擴散之質子（H+ )， 及流向外部回路之電子（)產生還原反應，生成反應生 成物。例如，使用空氣作爲氧化劑氣體時，空氣中所含氧 氣於陰極觸媒層6a所產生之反應如下述（2)式，此時反 應生成物爲水（Η 2 Ο )。 1 . 5 02 + 6H + + 6e"-> 3H2〇 ( 2 ) 藉由該（1)式與（2)式之反應同時發生’可完成作 爲燃料電池之發電反應。總燃料反應如下述（3 )式所示 -13- (11) 1342081 ， 於市場上流通等所進行之搬送、向顧客販賣及保管用之包 t 裝容器、收容複數個該包裝容器之容器等。 以下，將本發明之實施例參照圖樣進行詳細的說明。 【實施方式】 (實施例1 ) 圖2所示直接甲醛型燃料電池如下製作。 白金搭載石墨粒子與Dupont公司製之DE2020以均質 機混合製成泥漿，將此塗佈於陰極氣體擴散層6b之石墨 紙上。接著，將此於常溫下乾燥，於陰極氣體擴散層6b 上製作層合陰極觸媒層6a之陰極。 搭載白金釕合金微粒子之石墨粒子與Dupont公司製 之DE2020以均質機混合製成泥漿，將此塗佈於陽極氣體 擴散層7b之石墨紙上。接著，將此於常溫下乾燥，於陽 極氣體擴散層7b上製作層合陽極觸媒層7a之陽極。 當作質子傳導性電解質膜8，準備厚度30μΐΏ、含水率 10〜20重量％之全氟碳磺酸（nafi〇n (註冊商標）膜， Dupont公司製）。將此電解質膜以陰極及陽極夾持，於溫 度120°C、壓力lOkgf/cm2之條件下壓製，製造膜電極組 (MEA) 5。 接著’將此膜電極組5，以金箱夾住具吸收空氣及氣 化之甲醛之具複數開孔，形成陰極導電層10及陽極導電 層9。 上述膜電極組（MEA) 5、陽極導電層9、陰極導電層 (5 ) -15- (12) 1342081 - 1〇層合之層合體以樹脂製之2個框15a、15b夾住。再者 、 ，膜電極組5之陰極側及另一側之框1 5 b之間、膜電極組 5之陽極側與另一側之框1 5a之間，使其各自放入橡膠製 之Ο形圈1 1 a、1 1 b後密封。此外，陽極側之框1 5 a，經 由氣液分離膜1 4 ·於液體燃料槽1 2鎖上螺絲固定。氣液 分離膜14中使用0.1mm厚之矽板。 作爲保濕板準備厚度爲 5 00μπι，透氣度爲 2秒 /100cm3 ( JIS Ρ-8117-1998)，透濕度爲 4000g/m224h ( JIS L- 1 099- 1 99 3 A-1法）之聚乙烯製多孔質膜。陰極側 之框1 5 b上配置保濕板1 7。 將所得層合物，形成導入空氣用之空氣導入口 18( 口 徑 2.5mm，口數 8個）收容於厚度2 m m之不鏽鋼板（ SU S3 04 )所成之外裝容器4中，得到圖2所示之直接甲醛 型燃料電池。 將所得燃料電池於液體燃料槽〗2塡充狀態下，保存 於前述圖1所示形狀之容器1中。再者，容器之材質，係 樹脂材（聚對苯二甲酸乙二醇酯），且開孔率爲50%。保 存條件爲3(TC、相對濕度50%之大氣中保存48小時。 保存後，自容器1取出燃料電池，液體燃料槽丨2中 ，注入純甲醛5ml當作液體燃料13。於溫度25t、相對 濕度5 0 %之環境下，測量增加電流密度（c u r r e n t d e n s i t y )時之輸出密度（power density)及電池電壓（cell voltage )。將其結果作爲輸出密度變化曲線A 1，電池電 壓變化作爲曲線B 1如圖6所示。圖6之橫軸爲電流密度 -16- (13) 1342081 • ( mA/cm2 )，右側之縱軸爲輸出密度（mW/ cm2 )，左側 ，· 之縱軸爲電池電壓（V )。 (實施例2 ) 以實施例1說明同樣構成所製作之燃料電池，將所得 燃料電池於液體燃料槽1 2塡充狀態下，保存於前述圖1 所示形狀之容器1中。容器1中，除開孔率爲3 0 %以外使 用與實施例1相同之物。保存條件與實施例1相同。 保存後’自容器1取出燃料電池，於液體燃料槽12 中，注入與實施例1相同之液體燃料1 3。接著，與實施例 1相同測量輸出密度及電池電壓。將其結果作爲輸出密度 變化曲線A 2 ’電池電壓變化作爲曲線b 2如圖6所示。 (實施例3 ) 以實施例1說明之同樣構成製作燃料電池，將所得燃 料電池於液體燃料槽12塡充狀態下，保存於前述圖1所 示形狀之容器1中。容器1中，除開孔率爲1 〇%以外使用 與實施例1相同之物。保存條件與實施例1相同。 保存後’自容器1取出燃料電池，於液體燃料槽12 中’注入與實施例1相同之液體燃料1 3。接著，與實施例 1相同測量輸出密度及電池電壓。將其結果作爲輸出密度 變化曲線A 3 ’電池電壓變化作爲曲線b 3如圖6所示。 圖6之輸出密度變化如A1 、A2、 A3所示，最大輸 出密度’係隨收容燃料電池之容器丨開孔率增加而增加。 -17- (14) 1342081 - 開孔率爲30〜50%之實施例1、2之最大輸出密度，與開孔 ^ 率1 0%之實施例3相較尤佳。 此外，電池電壓變化如B 1、B2、B3所示，增加電流 密度時之電池電壓之降低幅度’係隨收容燃料電池之容器 1開孔率增加而減少。開孔率爲30〜50%之實施例】、2之 電壓特性，與開孔率1 0%之實施例3相較尤佳。 (比較例） 以實施例1說明同樣構成所製作之燃料電池，將所得 燃料電池於液體燃料槽1 2塡充狀態下，保存於無通氣孔 之氣密性之容器中。保存條件與實施例1相同。 保存後，自容器取出燃料電池，於液體燃料槽1 2中 ，注入與實施例1相同之液體燃料1 3。接著，與實施例i 相同測量輸出密度及電池電壓。將其結果作爲輸出密度變 化曲線A 4，電池電壓變化作爲曲線B 4如圖6所示。 如圖6所示，於使用無通氣孔之容器之比較例中，隨 電流密度的上升電池電壓（曲線B 4 )急劇下降，此外， 最大輸出密度（曲線A 4 )與實施例1〜3相比降低。 再者’本發明並不限定於與上述相同之實施形態，只 要實施階段中未脫離其要旨之範圍內改變構成要素亦可具 體化。此外’藉由適當組合下述實施形態中所明示之多個 構成要素’可形成各種發明。例如，亦可自實施形態所示 全構成要素刪除若干之構成要素。亦可再適當組合相異實 施狀態間之構成要素。 -18 - (15) 1342081 * 例如’於上述說明中’作爲燃料電池之構成雖然說明 4 膜電極組（MEA )下部中具燃料儲藏部之構造，然而自燃 料儲藏部向膜電極組之燃料的供給，亦可將燃料儲藏部及 膜電極組通過流路接續進行。此外，作爲燃料電池本體之 構成雖然以被動型之燃料電池爲例說明，然而主動型之燃 料電池’再者另燃料供給等—部分中使用泵之所謂半被動 型之燃料電池亦適用於本發明。半被動型之燃料電池中， 自燃料儲藏部向膜電極組供給之燃料使用於發電反應中， 接著循環後不返回燃料儲藏部。半被動型之燃料電池因爲 '燃料不循環，與以往之主動型方式不同，因此無損裝置之 小型化等。此外，燃料電池係使用泵供給燃料，與以往之 內部氣化型之純被動型方式不同。因此，如卜.述被稱爲半 被動型之燃料電池。再者，此半被動型之燃料電池，只要 S進行自燃料儲藏部向膜電極組供給燃料之構成可改爲以 配置燃料遮斷閘代替泵之構成。此時，燃料遮斷閘，係藉 由流路爲了控制液體燃料之供給所設置之物。 如上述說明構成之燃料電池，可得到與上述說明相同 之作用效果。向Μ E A供給燃料之蒸汽中，雖然亦可將全 部燃料作爲蒸汽供給，然而燃料之一部分以液體狀態供給 時亦可適用本發明。 〔產業上之可能利用性〕 依據本發明，可提供一種可控制因搬送及保存等而輸 出特性降低之收容燃料電池之容器、收容搭載燃料電池之 -19- (16) (16)1342081 電子機器的容器及附容器之燃料電池。 【圖式簡單說明】 [圖1 ]圖1係表示關於本發明之一實施形態之附谷器 之燃料電池的模式圖。 [圖2]圖2係於模式上表示圖1之燃料電池之一例（ 直接甲醛型燃料電池）之斷面圖。 [圖3]圖3係表示關於本發明之實施形態之收容燃料 電池之容器的模式圖。 [圖4]圖4係表示關於本發明之其他實施形態之收容 燃料電池之容器的模式圖。 [圖5 ]圖5係表示關於本發明之其他實施形態之收容 燃料電池之容器的模式圖。 [圖6]圖6係表示實施例1〜3及比較例之燃料電池中 便電流密度變化時的電池電壓變化及輸出密度變化之特性 圖。 【主要元件符號說明】 1 :容器 2 :通氣孔 3 :燃料電池 4 :外裝容器 5 :膜電極組件（MEA) 6a :陰極催化劑層 -20- (17) (17)1342081 6b :陰極氣體擴散層 7a :陽極催化劑層 7b :陽極氣體擴散層 8:質子傳導性電解質膜 9 :陽極導電層 10 :陰極導電層 1 1 a :矩形框狀密封之一側 1 1 b :矩形框狀密封之另一側 1 2 :液體燃料槽 1 3 :液體燃料 1 4 :氣液分離膜 15a、 15b：框 1 6 :氣化燃料收容室 1 7 :保濕板 1 8 :空氣導入口I. The proton conductive material contained in the electrolyte membrane 8 may be a fluorine-based resin having a sulfonic acid group such as a fluorocarbon sulfonate, a hydrocarbon resin having a sulfonic acid, a tungstic acid, a phosphotungstic acid, or the like. Inorganic substances, etc. The cathode catalyst layer 6a is laminated in the anode gas diffusion layer 6b, and the anode catalyst layer 7a is laminated in the anode gas diffusion layer 7b. The cathode gas diffusion layer 6b has a function of uniformly supplying the oxidant gas to the cathode catalyst 6a. On the other hand, the anode gas diffusion layer 7b has a function of uniformly supplying the fuel to the anode catalyst 7a. As the porous gas diffusion layer 6b and the anode gas diffusion layer 7b, for example, porous graphite paper can be used. The anode conductive layer 9 as an anode current collecting portion is laminated in the anode gas diffusion layer 7b of the membrane electrode group 5. On the other hand, the cathode conductive layer 10 as a cathode current collecting portion is laminated in the cathode gas diffusion layer 6b of the membrane electrode group 5. The anode conductive layer 9 and the cathode conductive layer 10 are materials for improving the conductivity of the cathode and the anode. Further, the anode conductive layer 9 and the cathode conductive layer 10 are opened by a gas permeation hole (not shown) because the oxidant gas or the vaporized fuel permeates. In the anode conductive layer 9 and the cathode conductive layer 10, for example, a gold electrode carrying Au foil can be used in the PET substrate. One side of the rectangular frame-shaped sealing material, 1 1 a, is formed on the proton conductive electrolyte membrane 8 as if it were around the cathode. Further, the other side lib, which is on the opposite side of the proton conductive electrolyte membrane 8, is formed around the circumference of the cathode. The sealing members 11a, lib have an O-ring function for preventing fuel leakage from the membrane electrode group 5 and leakage of oxidant gas. In the anode side of the membrane electrode group 5 (below the membrane electrode group 5 in Fig. 2), -10-(9)(9)1342081 is pressurized to improve the adhesion, for example, s US 3 0 4 Carbon steel, stainless steel, alloy steel, titanium alloy, nickel alloy metal. The liquid fuel 13 in the liquid fuel tank 12 is supplied to the anode catalyst layer 7a through the gas-liquid separation membrane 14 after the vaporized component thereof. In the anode catalyst layer 7a, protons (H+) and electrons (e-) are generated by oxidation reaction of the fuel. For example, when formaldehyde is used as the fuel, the catalytic reaction generated in the anode catalyst layer 7a is as shown in the following formula (1). CH3〇H + H2〇-^C02 + 6H + + 6e' (1) Protons (H+) generated in the anode catalyst layer 7a diffuse through the proton conductive membrane 8 and then to the cathode catalyst layer 6a. Further, at the same time, the electrons generated by the anode catalyst layer 7a flow into the cathode circuit layer 6a in the external circuit of the fuel cell to the subsequent external circuit for the load (resistance, etc.) of the external circuit. The oxidant gas such as air is supplied from the air introduction port 18 of the outer casing 4 through the space in the moisturizing plate 17, the frame 15b, the cathode conductive layer 10, and the cathode gas diffusion layer 6b, and then supplied to the cathode catalyst layer 6a. The oxygen in the oxidant gas is subjected to a reduction reaction with a proton (H+) diffused through the proton conductive membrane 8 and an electron flowing to the external loop to form a reaction product. For example, when air is used as the oxidant gas, the reaction of the oxygen contained in the air in the cathode catalyst layer 6a is as shown in the following formula (2), and the reaction product is water (Η 2 Ο ). 1 . 5 02 + 6H + + 6e "-> 3H2〇 ( 2 ) The simultaneous reaction of the reactions of the formulas (1) and (2) can be completed as a power generation reaction of the fuel cell. The total fuel reaction is as shown in the following formula (3) - 13 - (11) 1342081, which is transported on the market, transported, and sold to customers, and containers containing the packaging container. . Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. [Embodiment] (Example 1) A direct formaldehyde fuel cell shown in Fig. 2 was produced as follows. The platinum particles were loaded with platinum particles and a DE2020 manufactured by Dupont Co., Ltd., and mixed in a homogenizer to form a slurry, which was applied to graphite paper of the cathode gas diffusion layer 6b. Next, this is dried at normal temperature, and a cathode of the laminated cathode catalyst layer 6a is formed on the cathode gas diffusion layer 6b. The graphite particles containing the platinum bismuth alloy fine particles and the DE 2020 manufactured by Dupont Co., Ltd. were mixed with a homogenizer to prepare a slurry, which was applied onto the graphite paper of the anode gas diffusion layer 7b. Next, this is dried at normal temperature, and an anode of the laminated anode catalyst layer 7a is formed on the anode gas diffusion layer 7b. As the proton conductive electrolyte membrane 8, perfluorocarbonsulfonic acid (nafi〇n (registered trademark) membrane, manufactured by Dupont Co., Ltd.) having a thickness of 30 μM and a water content of 10 to 20% by weight was prepared. This electrolyte membrane was sandwiched between a cathode and an anode, and pressed at a temperature of 120 ° C under a pressure of 10 kgf/cm 2 to prepare a membrane electrode assembly (MEA) 5 . Next, the membrane electrode assembly 5 is formed by sandwiching a plurality of openings having a absorbing air and vaporized formaldehyde in a gold box to form a cathode conductive layer 10 and an anode conductive layer 9. The film electrode assembly (MEA) 5, the anode conductive layer 9, and the cathode conductive layer (5) -15-(12) 1342081 - 1 laminate are laminated in two frames 15a and 15b made of resin. Further, between the cathode side of the membrane electrode group 5 and the frame 15b of the other side, between the anode side of the membrane electrode group 5 and the frame 15a of the other side, each of them is placed in a rubber crucible. The ring 1 1 a, 1 1 b is sealed. Further, the frame 15 5 a on the anode side is screwed to the liquid fuel tank 1 2 via the gas-liquid separation membrane 14 . A 0.1 mm thick raft was used in the gas-liquid separation membrane 14. Prepared as a moisturizing plate with a thickness of 500 μm, a gas permeability of 2 sec/100 cm3 (JIS Ρ-8117-1998), and a moisture permeability of 4000 g/m224h (JIS L- 1 099- 1 99 3 A-1) Porous membrane. A moisturizing plate 17 is disposed on the frame 1 5 b of the cathode side. The obtained laminate was placed in an air inlet port 18 (having a diameter of 2.5 mm and a port number of 8) for introducing air into an outer container 4 made of a stainless steel plate (SU S3 04) having a thickness of 2 mm, and the obtained container 4 was obtained. Direct formaldehyde fuel cell shown. The obtained fuel cell was stored in the container 1 of the shape shown in Fig. 1 in the state in which the liquid fuel tank was filled. Further, the material of the container was made of a resin material (polyethylene terephthalate) and the opening ratio was 50%. The storage condition is 3 (TC, 50% relative humidity in the atmosphere for 48 hours. After storage, the fuel cell is taken out from the container 1, and the liquid fuel tank 2 is filled with 5 ml of pure formaldehyde as the liquid fuel 13. At a temperature of 25t, relative Under the environment of humidity of 50%, measure the power density and cell voltage when increasing the current density. The result is taken as the output density curve A1, and the battery voltage change is taken as the curve B1. Figure 6. The horizontal axis of Figure 6 is the current density -16 - (13) 1342081 • ( mA / cm2 ), the vertical axis on the right is the output density (mW / cm2), the left side, the vertical axis is the battery voltage ( V. (Example 2) A fuel cell produced in the same manner as in the first embodiment will be described, and the obtained fuel cell will be stored in the container 1 having the shape shown in Fig. 1 in a state where the liquid fuel tank 12 is filled. In the first embodiment, the same material as in Example 1 was used except that the opening ratio was 30%. The storage conditions were the same as in Example 1. After the storage, the fuel cell was taken out from the vessel 1, and injected into the liquid fuel tank 12, and Example 1 was injected. Same liquid Fuel 13. Next, the output density and the battery voltage were measured in the same manner as in Example 1. The result was taken as the output density change curve A 2 'the battery voltage change as a curve b 2 as shown in Fig. 6. (Example 3) In the same manner, the fuel cell is produced in the same manner, and the obtained fuel cell is stored in the container 1 having the shape shown in Fig. 1 in the state in which the liquid fuel tank 12 is filled. The container 1 is used in addition to the opening ratio of 1% by weight. The same conditions as in Example 1. The storage conditions were the same as in Example 1. After the storage, the fuel cell was taken out from the vessel 1, and the liquid fuel 13 was replaced in the liquid fuel tank 12 by the same procedure as in Example 1. Next, with Example 1 The same measurement output density and battery voltage were used as the output density curve A 3 'cell voltage change as curve b 3 as shown in Fig. 6. The output density change shown in Fig. 6 is as shown by A1, A2, A3, and the maximum output density. 'The system increases with the opening rate of the container for accommodating the fuel cell. -17- (14) 1342081 - The maximum output density of the first and second embodiments with an opening ratio of 30 to 50%, and the opening ratio of 1 0 % of Example 3 In addition, the battery voltage changes as indicated by B1, B2, and B3, and the decrease in the battery voltage at the time of increasing the current density decreases as the opening ratio of the container 1 in which the fuel cell is accommodated increases. The opening ratio is 30~ 50% of the examples] and the voltage characteristics of 2 are particularly preferable to Example 3 in which the opening ratio is 10%. (Comparative Example) The fuel cell produced by the same configuration will be described in the first embodiment, and the obtained fuel cell will be The liquid fuel tank is stored in a container having an airtightness without a vent hole in a state of being filled. The storage conditions were the same as in Example 1. After the storage, the fuel cell was taken out from the container, and the same liquid fuel 13 as in Example 1 was injected into the liquid fuel tank 12. Next, the output density and the battery voltage were measured in the same manner as in Example i. The result was taken as the output density change curve A 4 , and the battery voltage change was taken as the curve B 4 as shown in Fig. 6. As shown in Fig. 6, in the comparative example using the container having no vent hole, the battery voltage (curve B 4 ) sharply decreased as the current density increased, and the maximum output density (curve A 4 ) was compared with Examples 1 to 3 Than lower. Further, the present invention is not limited to the embodiments described above, and may be modified as long as the constituent elements are changed within the scope of the gist of the invention. Further, various inventions can be formed by appropriately combining a plurality of constituent elements ′ shown in the following embodiments. For example, a plurality of constituent elements may be deleted from all the constituent elements shown in the embodiment. It is also possible to appropriately combine the constituent elements between the different implementation states. -18 - (15) 1342081 * For example, in the above description, the structure of the fuel cell is described as a structure in which the fuel storage portion is provided in the lower portion of the membrane electrode assembly (MEA), but the fuel is supplied from the fuel storage portion to the membrane electrode assembly. The fuel storage unit and the membrane electrode group may be continuously connected through a flow path. Further, although the configuration of the fuel cell body is exemplified by a passive type fuel cell, a so-called semi-passive type fuel cell using a pump in an active type fuel cell 'further fuel supply or the like is also applicable to the present invention. . In the semi-passive type fuel cell, the fuel supplied from the fuel storage portion to the membrane electrode group is used in the power generation reaction, and is not returned to the fuel storage portion after the cycle. The semi-passive type fuel cell is different from the conventional active type because the fuel does not circulate, so the miniaturization of the non-destructive device is required. In addition, the fuel cell uses a pump to supply fuel, which is different from the conventional internal gasification type of pure passive type. Therefore, it is called a semi-passive type fuel cell. Further, in the semi-passive type fuel cell, as long as S is configured to supply fuel from the fuel storage portion to the membrane electrode group, the configuration in which the fuel blocking gate is replaced by the pump can be replaced. At this time, the fuel shutoff gate is provided by the flow path for controlling the supply of the liquid fuel. The fuel cell constructed as described above can obtain the same operational effects as those described above. In the steam for supplying fuel to Μ E A , although all of the fuel may be supplied as steam, the present invention is also applicable to a case where a part of the fuel is supplied in a liquid state. [Industrial Applicability] According to the present invention, it is possible to provide a container for accommodating a fuel cell that can control the reduction in output characteristics due to transportation, storage, etc., and to accommodate a fuel cell -19-(16) (16)1342081 electronic device The container and the fuel cell with the container. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a fuel cell of a sifter according to an embodiment of the present invention. Fig. 2 is a cross-sectional view showing an example of a fuel cell of Fig. 1 (direct formaldehyde fuel cell) in a mode. Fig. 3 is a schematic view showing a container for accommodating a fuel cell according to an embodiment of the present invention. Fig. 4 is a schematic view showing a container for accommodating a fuel cell according to another embodiment of the present invention. Fig. 5 is a schematic view showing a container for accommodating a fuel cell according to another embodiment of the present invention. Fig. 6 is a characteristic diagram showing changes in battery voltage and output density when the current density of the fuel cells of Examples 1 to 3 and Comparative Example is changed. [Main component symbol description] 1 : Container 2 : Ventilation hole 3 : Fuel cell 4 : Outer container 5 : Membrane electrode assembly (MEA) 6a : Cathode catalyst layer -20- (17) (17) 1342081 6b : Cathode gas diffusion Layer 7a: anode catalyst layer 7b: anode gas diffusion layer 8: proton conductive electrolyte membrane 9: anode conductive layer 10: cathode conductive layer 1 1 a : one side of a rectangular frame seal 1 1 b: another rectangular frame seal One side 1 2 : Liquid fuel tank 1 3 : Liquid fuel 14 : Gas-liquid separation membrane 15a, 15b: Frame 16: Gasification fuel storage chamber 1 7 : Moisture plate 1 8 : Air introduction port
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