201044675 六、發明說明： 【發明所屬之技術領域】 本發明乃關於使用液體燃料之燃料電池的技術。 【先前技術】 近年來，爲了無需長時間充電而可使用筆記型電腦或 行動電話等之各種攜帶用電子機器，嘗試對於此等攜帶用 0 電子機器的電源使用燃料電池。燃料電池係具有可只由供 給燃料與空氣（特別是氧氣）即可發電，經由補給燃料而 可連續長時間發電之特徵。因此，燃料電池係經由小型化 ，作爲攜帶用電子機器的電源，可成爲極爲有利的系統。 特別是，將甲醇作爲燃料而使用之直接甲醇型燃料電 池（以下亦有稱作DMFC之情況）係可做成小型化，更且 因燃料的處理容易之故，作爲攜帶用電子機器的電源而加 以期待。 Q 例如，如根據專利文獻1，提案有於燃料收容部的凸 緣部，重疊膜電極接合體，從膜電極接合體的空氣極側， 安裝金屬製之蓋板之同時，將蓋板的周緣部沿著膜電極接 合體之外周，凸緣部的外周及背面周緣部而加以彎曲，經 由以蓋板的周緣部夾持膜電極接合體及凸緣部之時，將燃 料收容部，對於膜電極接合體而言加以固定之構造。 另外，如根據專利文獻2，揭示有組合彎曲蓋板的端 部而鉚接於燃料供給部之構造，和締結固定蓋板及燃料供 給部之構造的構成。 -5- 201044675 更且，如根據專利文獻3 ’揭示有作爲壓上集電體於 膜電極接合體之推壓板，具備燃料極支持板與前殻蓋之構 成。 在燃料電池中，對於爲了維持發電性能，所層積之複 數的DMFC構成構件乃遍布於全面，且要有以均一且適度 的壓力加壓的狀態加以固定的必要。 作爲固定手法，有著螺絲固定或鉚釘接合，但對於適 用此等手法之情況，係必須確保螺絲類貫通之貫通孔。因 此，從體積效率及組裝作業效率的觀點，並無期望遍布燃 料電池之全周而適用此等手法者。另一方面，經由彎曲加 工而締結板材之手法係均適合於體積效率及作業效率。但 彎曲加工可能的板材係剛性低。因此，於從膜電極接合體 相距的方向，容易產生如膨脹之彎曲，而加壓成爲不充分 之同時’在面內壓力成爲不均一，有招致發電性能之下降 之虞。 〔專利文獻〕 〔專利文獻1〕國際公開第2006/12〇966號說明書 〔專利文獻2〕日本特開2008-218054號公報 〔專利文獻3〕日本特開2〇〇8_226486號公報 【發明內容】 〔發明欲解決之課題〕 本發明之目的係提供可進行膜電極接合體之均〜的加 壓同時’可提昇加工性，可得到安定且充分之輸出的燃料 -6- 201044675 電池。 〔爲解決課題之手段〕 如根據本發明之一形態，提供具備： 夾持電解質膜於陽極與陰極之間的構成 體，和配置於前述膜電極接合體之陽極側， 供給燃料之燃料供給機構，和配置於前述膜 Q 陰極側，經由彎曲加工而締結於前述燃料供 ，和配置於前述膜電極接合體與前述蓋板之 板爲高剛性之剛性構件者爲特徵之燃料電池 〔發明之效果〕 如根據本發明，可提供可進行膜電極接 加壓同時，可提昇加工性，可得到安定且充 料電池。 Ο 【實施方式】 以下，對於有關本發明之一實施形態的 照圖面加以說明。 圖1乃顯示有關本實施形態之燃料電 之陰極側外觀的平面圖。 其燃料電池1係形成爲矩形平板狀。在 面圖中，燃料電池1乃長方形狀，具有沿著 延伸之一對的長邊L1及長邊L2，和沿著室 之膜電極接合 朝前述陽極而 電極接合體之 給機構之蓋板 間，較前述蓋 合體之均一的 分之輸出的燃 燃料電池，參 池（D M F C ) 1 _ 1所示之平 第1方向X而 :直交叉於第1 201044675 方向X之第2方向Y而延伸之一對的短邊S1及短邊S2。 另外，對於燃料電池1之陰極側表面，係配置有蓋板 2 1。蓋板2 1係外觀爲略矩形狀的構成，例如經由不鏽鋼 (SUS)加以形成。對於其蓋板21，係主要形成可導入氧 化劑之空氣的複數之貫通孔的開口部2 1 A。然而，圖中的 +符號係顯示將蓋板2 1，實施螺絲固定或鉚釘接合之位置 的一例。 圖2乃顯示將圖1所示之燃料電池1，沿著第1方向 X切斷的剖面圖，圖3乃顯示將圖1所示之燃料電池1， 沿著第2方向Y切斷的剖面圖。 燃料電池1係具備：構成起電部之膜電極接合體（以 下，亦有稱作MEA之情況）2，及供給燃料至膜電極接合 體2之燃料供給機構3。 即，膜電極接合體2係由具備層積陽極觸媒層1 1與 陽極氣體擴散層1 2之陽極（或亦有稱作燃料極之情況） 1 3，和層積陰極觸媒層1 4與陰極氣體擴散層1 5之陰極（ 或亦有稱作空氣極或氧化劑極之情況）1 6，和由陽極13 之陽極觸媒層11與陰極16之陰極觸媒層14所夾持之質 子（氫離子）傳導性之電解質膜1 7而加以構成。如此之 膜電極接合體2係經由集電體1 8所加以夾持。 在其實施形態中，如圖3所示，膜電極接合體2係具 有：於在單一的電解質膜1 7之一方的面1 7 A上’隔開間 隔加以配置之複數的陽極1 3，和於在電解質膜1 7之另一 方的面1 7 B上，與各陽極1 3隔開間隔加以配置之複數的 -8 - 201044675 陰極1 6。 此等陽極1 3與陰極1 6之各組合係各夾持電解質膜i 7 ’構成單元件。在此，各單元件係在同一平面上，沿著第 1方向X而延伸存在，於第2方向Y，隔開間隔加以排列 配置。然而’膜電極接合體2之構造係不限於此例，而亦 可爲其他構造。 在此所示的例中，膜電極接合體2係具有配置於單一 之電解質膜17之一方的面17A上之4個的陽極131〜134 ，和配置於電解質膜1 7之另一方的面1 7B之4個的陰極 161〜164。陽極131與陰極161乃呈各對向地加以配置， 構成1組之單元件。同樣地，陽極1 3 2與陰極162乃呈各 對向地加以配置，陽極1 3 3與陰極1 63乃呈各對向地加以 配置，陽極1 3 4與陰極1 64乃呈各對向地加以配置，4組 之單元件乃加以配列於同一平面上。各單元件係經由集電 體1 8，串聯地加以電性連接。 集電體18之陽極集電體A1係層積於陽極131之陽極 氣體擴散層1 2 ’同樣地陽極集電體A2係層積於陽極1 3 2 之陽極氣體擴散層1 2，陽極集電體A3係層積於陽極1 3 3 之陽極氣體擴散層1 2，陽極集電體A4係層積於陽極1 3 4 之陽極氣體擴散層1 2。 集電體18之陰極集電體C係層積於陰極161之陰極 氣體擴散層1 5 ’同樣地陰極集電體C2係層積於陰極1 62 之陰極氣體擴散層15，陰極集電體C3係層積於陰極163 之陰極氣體擴散層15，陰極集電體C4係層積於陰極164 -9- 201044675 之陰極氣體擴散層1 5。 膜電極接合體2係經由各配置於電解質膜1 7之陽極 側及陰極側的橡膠製之〇環等之密封構件1 9加以密封。 由此，防止從膜電極接合體2之燃料洩漏或氧化劑洩漏。 對於膜電極接合體2之陰極1 6側係配置有經由絕緣 材料所形成之板狀體20。其板狀體20係主要作爲保濕層 而發揮機能。即，其板狀體2 0係浸含有在陰極觸媒層1 4 所生成的水之一部分，控制水的蒸散的同時，調整對於陰 極觸媒層14之空氣的導入量且促進空氣之均一擴散者。 對於上述之膜電極接合體2之陽極1 3側，係配置有 '燃料供給機構3。也就是膜電極接合體2係加以配置於配 置在陽極側之燃料供給機構3與配置在陰極側之蓋板2】 之間。 燃料供給機構3乃對於膜電極接合體2之陽極1 3而 言’呈供給燃料地加以構成，但並無特別限定於特定之構 成。以下，對於燃料供給機構3之一例加以說明。 燃料供給機構3乃具備於相對之膜電極接合體2之陽 極1 3的面方向’使燃料分散以及擴散之同時供給之燃料 供給部3X。其燃料供給部3Χ係具備形成爲箱狀之容器 3 0 ’及配置於容器3 〇底面3 5之燃料分配板3丨。如此之燃 料供給機構3係與收容液體燃料之燃料收容部4，藉由流 路5而加以連接。 對於容器3 0 ’於後加以詳細說明’但爲了導入燃料之 燃料導入口 3〇Α乃加以形成於側壁36Α。其燃料導入口 -10 - 201044675 3 〇 A係連接於連繫至燃料收容部4之流路5。 燃料分配板3〗係具有丨個之燃料注入口 32，和複數 之燃料排出口 33 ’藉由如細管34之燃料通路而連接燃料 注入口 3 2與燃料排出口 3 3之構成。燃料注入口 3 2係與 燃料導入口 3〇A加以直接連接，但藉由其他的燃料通路加 以連接亦可。燃料排出口 3 3係對向於膜電極接合體2之 陽極1 3。 0 對於燃料收容部4係收容對應於膜電極接合體2之液 體燃料。作爲液體燃料係可舉出各種濃度之甲醇水溶液或 純甲醇等之甲醇燃料。然而，液體燃料係未必侷限於甲醇 燃料之構成。液體燃料係亦可爲例如，乙醇水溶液或純乙 酉子等之乙醇燃料，丙醇水溶液或純丙醇等之丙醇燃料，乙 二醇水溶液或純乙二醇等之乙二醇燃料，二甲醚，蟻酸， 其他的液體燃料。無論如何，對於燃料收容部4係收容有 對應於膜電極接合體2之液體燃料。 Ο 更且，在燃料供給機構3中’對於連繫至燃料收容部 4之流路5 ’或者燃料導入口 3 ο A與燃料注入口 3 2之間的 . 燃料通路，介入存在有幫浦6亦可。幫浦6並非爲使燃料 循環之幫浦’徹底來說爲從燃料收容部4，將液體燃料輸 液至燃料供給部3 X的燃料供給幫浦。從燃料供給部3 X 供給至膜電極接合體2之燃料乃使用於發電反應，之後進 行循環而未返回至燃料收容部4者。 幫浦6的種類，並無特別加以限定，可控制性佳地輸 送少量的液體燃料，且可小型輕量化者爲佳。 -11 - 201044675 本實施形態之燃料電池1係從未循環燃料之情況，與 以往之主動方式不同者，並非損及裝置之小型化等構成。 另外’對於液體燃料的供給，使用幫浦6，亦與如以往之 內部氣化型之純被動方式不同。圖1所示之燃料電池1係 適用例如稱作半被動型之方式的構成。 另外’在燃料供給機構3中，與幫鋪6串聯地配置燃 料遮斷閥亦可。另外，於燃料收容部4或流路5，亦可裝 置使燃料收容部4內之壓力，與外氣平衡之平衡閥。 如上述，從燃料供給部3 X所排出之燃料係供給至膜 電極接合體2之陽極1 3。在膜電極接合體2內，燃料係擴 散在陽極氣體擴散層1 2，供給至陽極觸媒層1 1。作爲液 體燃料而使用甲醇燃料之情況，在陽極觸媒層1 1產生以 下式（1 )所示之甲醇的內部改質反應。然而，對於作爲 甲醇燃料而使用純甲醇之情況，使在陰極觸媒層1 4生成 的水或電解質膜1 7中的水，與甲醇進行反應而使（1 )式 之內部改質反應生起。或者，經由未需要水之其他的反應 機構，產生內部改質反應。 C Η 3 ◦ Η + Η 2 〇 — C Ο 2 + 6 Η + + 6 e- …(1 ) 由此反應所生成之電子（e·)係經由集電體1 8而引導 至外部，所謂在做爲電性而使攜帶用電子機器等進行動作 後，經由集電體1 8而引導至陰極1 6。在（1 )式之內部改 質反應所生成之質子（Η + )係經由電解質膜1 7而引導至 陰極1 6。對於陰極1 6係作爲氧化劑而供給空氣。到達至 陰極1 6之電子（e )與質子（H f )係在陰極觸媒層1 4， -12- 201044675 與空氣中的氧氣，隨著下述之式（2)反應，伴隨其反應 而生成水。 6e - +6H+ + ( 3/2) 02— 3 H2〇 …（2) 針對在上述之燃料電池1之發電反應，對於爲了使進 行發電之電力增加，係圓滑地進行觸媒反應之同時，均一 地供給燃料於膜電極接合體2之電極全體，使電極全體更 有效地貢獻於發電之情況則成爲重要。 Q 圖4係顯示構成燃料供給部3 X之容器3 0的外觀斜視 圖。容器30係具有於第丨方向X長的長方形狀的底面35 ’和從此底面35之四方直立之側壁36A乃至36D。更具 體而S ’側壁36 A係沿著燃料電池1之短邊s 1而延伸存 在。側壁3 6B係沿著燃料電池丨之短邊S2而延伸存在。 側壁3 6 C係沿著燃料電池1之長邊l 1而延伸存在。側壁 3 6 D係沿著燃料電池丨之長邊L2而延伸存在。此等側壁 36 A至36D的高度係實質上爲相同。 ❹ 對於側壁3 6 A之側面略中央（也就是短邊s 1之中點 附近）’形成有燃料導入口 3 0 A。另外，在圖4所示的例 中’對於側壁3 6 A ’係形成有貫通於高度方向之複數的貫 通孔Η 1。此等貫通孔η 1係迴避燃料導入口 3 〇 A而加以形 成。對於其燃料導入口 3 0 A係連接有連繫至燃料收容部之 流路。 對於側壁3 6 B ’係形成有貫通於高度方向之複數的貫 通孔H2。側壁3 6C及側壁3 6D係形成爲較側壁3 6 a及側 壁3 0B爲小的寬度，未形成有貫通孔。 -13- 201044675 如此之容器3 0係經由使用例如樹脂材料而成型者加 以形成。 在其實施形態中，如圖2及圖3所示，燃料電池1係 具備配置於膜電極接合體2與蓋板2 1之間的剛性構件40 。其剛性構件4〇係具有較蓋板2 1爲高的剛性。如此之剛 性構件40係形成爲例如平板狀，重疊於配置於膜電極接 合體2上之板狀體2〇。另外，剛性構件40之周邊部係重 疊於各容器30之側壁30A乃至36D上。也就是，剛性構 件4〇係在與燃料供給機構3之間保持膜電極接合體2。 蓋板2 1係重疊於與具備前述容器3 0之燃料供給機構 3之間保持膜電極接合體2之剛性構件40，與燃料供給機 構3加以締結。特別是在謀求燃料電池1之小型化或組裝 作業性的改善上，蓋板21係對於燃料電池1之至少1邊 ，或對向之2邊，經由彎曲加工（鉚接）而與燃料供給機 構3加以締結爲佳。 適用圖4所示之容器3 0的情況，在燃料電池1之長 邊L1及長邊L2中’蓋板2 1係經由彎曲加工而與構成燃 料供給機構3之容器3 〇加以締結。也就是，沿著長邊L1 及長邊L 2之蓋板2 1的端部係沿著膜電極接合體2之外周 、容器3 0之側壁3 6 C及側壁3 6 D各加以彎曲，更且彎曲 於容器3 0的背面側。 另外’在短邊S 1及短邊S2中，蓋板2 ；!係經由螺絲 固定或鉚釘接合等之手法而與容器3 0加以締結。也就是 沿著短邊S 1及短邊S 2之蓋板2 1的端部係各加以重疊於 -14- 201044675 容器30之側壁36A及側壁36B，利用貫通孔H1及H2， 經由螺絲固定或鉚釘接合而加以締結。然而，對於剛性構 件4 0，亦如重邊於谷器3 〇之側壁3 6 a及側壁3 6 b之位置 ’形成有與貫通孔Η 1及H2各連通之貫通孔，經由螺絲 固定或鉚釘接合而與蓋板2 i同時締結於容器3 〇。 經由如此之構成’使用比較低剛性之材料，也就是容 易彎曲加工之材料而形成蓋板2 1，使用較蓋板2 1剛性高 0 之材料而形成剛性構件4〇。並且，在經由剛性構件40而 保持層積於與燃料供給機構3之間的複數之D MF C之構成 構件的狀態’呈被覆剛性構件4 0地安裝蓋板2 1，經由彎 曲加工蓋板2 1之端部而與燃料供給機構3締結。 由此’剛性構件40係經由蓋板2 1而適度地進行加壓 。因此，剛性構件40係將含有膜電極接合體2之DMFC 構成構件，遍佈於全面，以均一且適度的壓力進行加壓。 因蓋板2 1乃締結於燃料供給機構3之故，維持經由剛性 Q 構件40之加壓狀態。 隨之，可提昇爲了締結之加工性同時，可將膜電極接 合體2均一且適度地進行加壓者。因此，可提供安定且得 到充分輸出之燃料電池1。另外，假設即使蓋板2 1經由彎 曲加工，其中央部附近乃彎曲於從剛性構件4 〇離間之方 向，只要在蓋板2 1之周邊部按壓剛性構件4 〇 ’可經由剛 性構件4 0而維持均一且適度地加壓膜電極接合體2之狀 能 〇 然而，蓋板21係在至少一邊，經由對於容器3 0而言 -15- 201044675 進行彎曲加工而加以締結爲佳，對於燃料電池丨之 經由彎曲加工而締結於燃料供給機構3亦可。 另外，對於彎曲加工困難的構成，或者較彎曲 締結強度作爲必要的情況，蓋板2丨係在至少一邊 谷器3 0而θ ’經由螺絲固定或鉚釘接合而加以締 〇 上述之剛性構件40係具有連通於蓋板2 1之 2 1 Α的貫通孔之開口部4〇Α。開口部4〇α係和開口 略同一之形狀，且以同一間隔加以形成。 如根據如此之構成’經由剛性構件4 〇之開口 及蓋板21之開口部21Α’確保燃料電池1之陰極 氣性。因此’未阻礙伴隨對於發電必要之氧氣導入 所生成之氣體的排出’而可維持適合於燃料電池i 的環境者。 前述之燃料供給機構3係呈其剛性較蓋板2 1 加以形成。在此’燃料供給機構3之中，在與剛性 之間，夾持含有膜電極接合體2之D M F C構成構件 分配板3 1及容器3 0合倂之總合性的剛性，呈較 爲高地加以形成。 即，對於例如燃料分配板3 1及容器3 0的剛性 情況，有著經由與蓋板2 1之締結而產生彎曲之虞 是，含有膜電極接合體2之DMFC構成構件係有必 緊密相互之狀態’以比較高的剛性之一對的構件， 面狀者爲佳。隨之’不只剛性構件40，而燃料供鞋 4邊， 加工， ，對於 結亦可 開口部 部21 A 部 40 A 側的通 及發電 之發電 爲高地 構件40 之燃料 蓋板2 1 爲低之 。也就 、要維持 夾持成 機構3 -16- 201044675 的剛性亦較蓋板2 1爲高者爲佳。 上述之剛性構件40係經由單一之板 此，例如剛性構件40係經由比較厚的板5 加以形成，但並不限定於此。 然而，剛性構件40係經由層積2片 以構成亦可。即，在層積複數片比較低剛 成，作爲剛性構件40，總合性剛性如較蓋 Q 以形成亦可。 然而，在此之剛性係指經由以下之方: 首先，固定剛性構件之端部或蓋板之 此等平面之中央部，測定對於中央部產生 之荷重。對於產生其1 mm變位所需之荷 爲剛性爲高。然而，在此之「端部」係指 板之一端，至相當於其一端部與平面方向 離之1 0%以下的距離之範圍位置。另外， Q 端部的情況，將所彎曲之部分做成端部。 作爲一例，蓋板2 1與剛性構件40乃 例如不鏽鋼（SUS )加以形成之情況，厚 之故，剛性構件4 0係較蓋板2 1爲厚地加. 在作爲剛性構件40而確保必要的剛 40之厚度乃0.5mm以上爲佳。適用如此 40的情況，無關於蓋板21之厚度或剛性 40本身的變形，在面內以均一且適度的 構成構件者成爲可能。201044675 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a technology of a fuel cell using a liquid fuel. [Prior Art] In recent years, in order to use a portable electronic device such as a notebook computer or a mobile phone, it is attempted to use a fuel cell for the power supply of such a portable electronic device. The fuel cell is characterized in that it can generate electricity only by supplying fuel and air (especially oxygen), and can continuously generate electricity for a long time by refueling. Therefore, the fuel cell can be an extremely advantageous system by miniaturizing it as a power source for a portable electronic device. In particular, a direct methanol fuel cell (hereinafter also referred to as a DMFC) which uses methanol as a fuel can be miniaturized, and it is easy to handle the fuel, and is used as a power source for the portable electronic device. Look forward to it. For example, according to Patent Document 1, it is proposed to overlap the membrane electrode assembly in the flange portion of the fuel containing portion, and to attach the metal cover from the air electrode side of the membrane electrode assembly, and to cover the periphery of the cover. The portion is bent along the outer circumference of the membrane electrode assembly, the outer circumference and the outer peripheral edge portion of the flange portion, and the fuel accommodating portion and the film are sandwiched when the membrane electrode assembly and the flange portion are sandwiched by the peripheral edge portion of the lid portion. The electrode assembly is configured to be fixed. Further, according to Patent Document 2, a structure in which the end portion of the curved cover is combined and riveted to the fuel supply portion, and a structure in which the fixed cover and the fuel supply portion are joined are disclosed. Further, as disclosed in Patent Document 3', there is disclosed a push plate for pressing a current collector on a membrane electrode assembly, and a fuel electrode support plate and a front cover are provided. In the fuel cell, in order to maintain the power generation performance, a plurality of laminated DMFC constituent members are provided in a comprehensive manner, and it is necessary to fix them in a state of being pressurized with uniform and moderate pressure. As a fixing method, there are screw fixing or rivet joining, but in the case of applying these methods, it is necessary to ensure a through hole through which the screws pass. Therefore, from the viewpoints of volumetric efficiency and assembly work efficiency, it is not desirable to apply these methods throughout the entire circumference of the fuel cell. On the other hand, the method of joining sheets by bending processing is suitable for volumetric efficiency and work efficiency. However, the bending of the possible sheet material is low in rigidity. Therefore, in the direction from the distance from the membrane electrode assembly, bending such as expansion is likely to occur, and the pressurization is insufficient, and the in-plane pressure becomes uneven, which causes a decrease in power generation performance. [Patent Document 1] [Patent Document 1] International Publication No. 2006/12〇966 (Patent Document 2) Japanese Laid-Open Patent Publication No. 2008-218054 (Patent Document 3) JP-A-2002-226486 [Problem to be Solved by the Invention] An object of the present invention is to provide a fuel -6-201044675 battery which can perform a uniform pressurization of a membrane electrode assembly while improving workability and obtaining a stable and sufficient output. [Means for Solving the Problem] According to one aspect of the present invention, a fuel supply mechanism that supplies an electrolyte is provided in a configuration in which an electrolyte membrane is sandwiched between an anode and a cathode, and an anode disposed on an anode side of the membrane electrode assembly And a fuel cell characterized by being disposed on the cathode side of the film Q and being connected to the fuel supply by bending, and a rigid member disposed on the plate electrode assembly and the plate of the cover plate having high rigidity (the effect of the invention) According to the present invention, it is possible to provide a membrane electrode and pressurization while improving workability, and a stable and charged battery can be obtained. [Embodiment] Hereinafter, a plan view of an embodiment of the present invention will be described. Fig. 1 is a plan view showing the appearance of the cathode side of the fuel electric power according to the embodiment. The fuel cell 1 is formed in a rectangular flat plate shape. In the plan view, the fuel cell 1 has a rectangular shape, and has a long side L1 and a long side L2 along a pair of extensions, and a cover plate that is bonded to the anode along the membrane electrode of the chamber and the electrode assembly of the electrode assembly a fuel cell having a uniform output compared to the above-mentioned cover body, the first direction X shown by the reference pool (DMFC) 1 _ 1 and extending in the second direction Y of the first 201044675 direction X The short side S1 and the short side S2 of a pair. Further, a cover plate 21 is disposed on the cathode side surface of the fuel cell 1. The cover plate 2 1 has a substantially rectangular outer appearance and is formed, for example, by stainless steel (SUS). In the cover plate 21, an opening portion 2 1 A of a plurality of through holes through which air of an oxidizing agent can be introduced is formed. However, the + symbol in the figure shows an example of a position at which the cover 2 1 is screwed or rivet-joined. 2 is a cross-sectional view showing the fuel cell 1 shown in FIG. 1 taken along the first direction X, and FIG. 3 is a cross-sectional view showing the fuel cell 1 shown in FIG. 1 cut along the second direction Y. Figure. The fuel cell 1 includes a membrane electrode assembly (hereinafter also referred to as an MEA) 2 constituting the electrification portion, and a fuel supply mechanism 3 that supplies fuel to the membrane electrode assembly 2. That is, the membrane electrode assembly 2 is composed of an anode (or a case also referred to as a fuel electrode) 13 having a laminated anode catalyst layer 11 and an anode gas diffusion layer 12, and a laminated cathode catalyst layer 14 The protons sandwiched by the cathode of the cathode gas diffusion layer 15 (or also referred to as the air or oxidant electrode) 66 and the cathode catalyst layer 11 of the anode 13 and the cathode catalyst layer 14 of the cathode 16 The (hydrogen ion) conductive electrolyte membrane 17 is configured. The membrane electrode assembly 2 is sandwiched by the current collector 18. In the embodiment, as shown in FIG. 3, the membrane electrode assembly 2 has a plurality of anodes 1 3 disposed at intervals on one of the surfaces 1 7 A of the single electrolyte membrane 17 , and On the other surface 1 7 B of the electrolyte membrane 17 , a plurality of -8 - 201044675 cathodes 16 are disposed at a distance from each anode 13 . Each of the combinations of the anode 13 and the cathode 16 each sandwich the electrolyte membrane i 7 ' to constitute a unitary member. Here, each of the unitary members is formed on the same plane and extends along the first direction X, and is arranged at intervals in the second direction Y. However, the structure of the membrane electrode assembly 2 is not limited to this example, but may be other configurations. In the example shown here, the membrane electrode assembly 2 has four anodes 131 to 134 disposed on one surface 17A of the single electrolyte membrane 17, and the other surface 1 disposed on the other side of the electrolyte membrane 17 The cathodes 161 to 164 of four of 7B. The anode 131 and the cathode 161 are disposed in opposite directions to constitute a unit of one unit. Similarly, the anode 133 and the cathode 162 are disposed in opposite directions, and the anode 133 and the cathode 163 are disposed in opposite directions, and the anode 134 and the cathode 164 are opposed to each other. Configured, the four units of the unit are arranged on the same plane. Each of the unitary members is electrically connected in series via the current collectors 18. The anode current collector A1 of the current collector 18 is laminated on the anode gas diffusion layer 1 2 of the anode 131. Similarly, the anode current collector A2 is laminated on the anode gas diffusion layer 12 of the anode 1 3 2 , and the anode is collected. The body A3 is laminated on the anode gas diffusion layer 12 of the anode 1 3 3 , and the anode current collector A4 is laminated on the anode gas diffusion layer 12 of the anode 1 3 4 . The cathode current collector C of the current collector 18 is laminated on the cathode gas diffusion layer 15 of the cathode 161. Similarly, the cathode current collector C2 is laminated on the cathode gas diffusion layer 15 of the cathode 1 62, and the cathode current collector C3 The cathode gas diffusion layer 15 is laminated on the cathode 163, and the cathode current collector C4 is laminated on the cathode gas diffusion layer 15 of the cathode 164 -9- 201044675. The membrane electrode assembly 2 is sealed by a sealing member 19 such as a rubber ring which is disposed on the anode side and the cathode side of the electrolyte membrane 17 . Thereby, fuel leakage or oxidant leakage from the membrane electrode assembly 2 is prevented. A plate-like body 20 formed of an insulating material is disposed on the cathode 16 side of the membrane electrode assembly 2. The plate-like body 20 functions mainly as a moisturizing layer. That is, the plate-like body 20 is impregnated with a portion of the water generated in the cathode catalyst layer 14 to control the evapotranspiration of the water, and the amount of introduction of air to the cathode catalyst layer 14 is adjusted to promote uniform diffusion of air. By. The fuel supply mechanism 3 is disposed on the anode 13 side of the membrane electrode assembly 2 described above. That is, the membrane electrode assembly 2 is disposed between the fuel supply mechanism 3 disposed on the anode side and the cover 2 disposed on the cathode side. The fuel supply mechanism 3 is configured to supply fuel to the anode 13 of the membrane electrode assembly 2, but is not particularly limited to a specific configuration. Hereinafter, an example of the fuel supply mechanism 3 will be described. The fuel supply unit 3 is provided with a fuel supply unit 3X that supplies fuel while dispersing and diffusing the fuel in the surface direction of the anode 13 of the membrane electrode assembly 2. The fuel supply unit 3 includes a container 3 0 ' in a box shape and a fuel distribution plate 3 配置 disposed on the bottom surface 35 of the container 3 . The fuel supply mechanism 3 is connected to the fuel accommodating portion 4 for accommodating the liquid fuel by the flow path 5. The container 30' will be described in detail later, but the fuel introduction port 3 for introducing the fuel is formed on the side wall 36A. The fuel introduction port -10 - 201044675 3 〇 A is connected to the flow path 5 connected to the fuel containing portion 4. The fuel distribution plate 3 has a fuel injection port 32, and a plurality of fuel discharge ports 33' are connected to the fuel injection port 32 and the fuel discharge port 3 by a fuel passage such as a thin tube 34. The fuel injection port 3 2 is directly connected to the fuel introduction port 3A, but may be connected by another fuel passage. The fuel discharge port 3 3 is opposed to the anode 13 of the membrane electrode assembly 2. The fuel accommodating portion 4 accommodates the liquid fuel corresponding to the membrane electrode assembly 2. Examples of the liquid fuel system include methanol aqueous solutions of various concentrations or methanol fuels such as pure methanol. However, the liquid fuel system is not necessarily limited to the composition of the methanol fuel. The liquid fuel system may be, for example, an ethanol fuel such as an aqueous ethanol solution or a pure ethylene glycol, a propanol fuel such as an aqueous solution of propanol or pure propanol, a glycol fuel such as an aqueous solution of ethylene glycol or pure ethylene glycol, or the like. Ether, formic acid, other liquid fuels. In any case, the fuel accommodating portion 4 accommodates the liquid fuel corresponding to the membrane electrode assembly 2. Further, in the fuel supply mechanism 3, 'the fuel passage 5' connected to the fuel containing portion 4 or the fuel inlet port 3 ο A and the fuel injection port 32 are interposed between the fuel passages and the pump 6 Also. The pump 6 is not a pump for fuel circulation. It is a fuel supply pump that supplies the liquid fuel to the fuel supply unit 3 X from the fuel containing unit 4. The fuel supplied from the fuel supply unit 3 X to the membrane electrode assembly 2 is used for the power generation reaction, and then circulated without returning to the fuel storage unit 4. The type of the pump 6 is not particularly limited, and it is preferable to transmit a small amount of liquid fuel in a controlled manner, and it is preferable to be small and lightweight. -11 - 201044675 The fuel cell 1 of the present embodiment is a case where the fuel is never recirculated, and unlike the conventional active method, the fuel cell 1 is not configured to be reduced in size. In addition, the use of the pump 6 for the supply of liquid fuel is also different from the pure passive mode of the internal gasification type as in the past. The fuel cell 1 shown in Fig. 1 is applied to a configuration called, for example, a semi-passive type. Further, in the fuel supply mechanism 3, a fuel shutoff valve may be disposed in series with the slab 6. Further, a balance valve for balancing the pressure in the fuel containing portion 4 with the outside air may be provided in the fuel containing portion 4 or the flow path 5. As described above, the fuel discharged from the fuel supply unit 3 X is supplied to the anode 13 of the membrane electrode assembly 2. In the membrane electrode assembly 2, the fuel is diffused in the anode gas diffusion layer 12 and supplied to the anode catalyst layer 11 . When a methanol fuel is used as the liquid fuel, an internal reforming reaction of methanol represented by the following formula (1) is generated in the anode catalyst layer 11. However, in the case where pure methanol is used as the methanol fuel, the water generated in the cathode catalyst layer 14 or the water in the electrolyte membrane 17 is reacted with methanol to cause the internal reforming reaction of the formula (1) to occur. Alternatively, an internal reforming reaction is generated via another reaction mechanism that does not require water. C Η 3 ◦ Η + Η 2 〇 - C Ο 2 + 6 Η + + 6 e- (1) The electrons (e·) generated by the reaction are guided to the outside via the current collector 18, so-called After being operated as an electrical device, the portable electronic device or the like is operated, and then guided to the cathode 16 via the current collector 18. The proton (Η + ) generated by the internal reforming reaction of the formula (1) is guided to the cathode 16 via the electrolyte membrane 17 . The cathode 16 is supplied with air as an oxidant. The electrons (e) and protons (H f ) reaching the cathode 16 are in the cathode catalyst layer 14 4, -12- 201044675 and oxygen in the air, reacting with the following formula (2), accompanied by the reaction Generate water. 6e - +6H+ + (3/2) 02-3 H2〇 (2) For the power generation reaction of the fuel cell 1 described above, in order to increase the electric power for power generation, the catalyst reaction is smoothly performed while uniformizing It is important to supply fuel to the entire electrode of the membrane electrode assembly 2, and to contribute more efficiently to the entire power generation. Q Fig. 4 is a perspective view showing the appearance of the container 30 constituting the fuel supply portion 3 X. The container 30 has a rectangular bottom surface 35' that is long in the second direction X and side walls 36A or 36D that are erected from the four sides of the bottom surface 35. More specifically, the S' side wall 36 A extends along the short side s 1 of the fuel cell 1. The side wall 3 6B extends along the short side S2 of the fuel cell stack. The side wall 3 6 C extends along the long side l 1 of the fuel cell 1 . The side wall 3 6 D extends along the long side L2 of the fuel cell stack. The heights of the side walls 36 A to 36D are substantially the same.燃料 A fuel introduction port 3 0 A is formed at a slightly center of the side surface of the side wall 3 6 A (that is, near the midpoint of the short side s 1 ). Further, in the example shown in Fig. 4, a plurality of through holes 贯通 1 penetrating through the height direction are formed for the side wall 3 6 A '. These through holes η 1 are formed by avoiding the fuel introduction port 3 〇 A. A flow path connected to the fuel containing portion is connected to the fuel introduction port 30A. The side wall 3 6 B ' is formed with a plurality of through holes H2 penetrating through the height direction. The side wall 3 6C and the side wall 3 6D are formed to have a smaller width than the side wall 316a and the side wall 30B, and no through hole is formed. -13- 201044675 Such a container 30 is formed by molding using, for example, a resin material. In the embodiment, as shown in Figs. 2 and 3, the fuel cell 1 includes a rigid member 40 disposed between the membrane electrode assembly 2 and the lid 21. The rigid member 4 has a higher rigidity than the cover 21. The rigid member 40 is formed, for example, in a flat plate shape, and is superposed on the plate-like body 2 disposed on the membrane electrode assembly 2. Further, the peripheral portion of the rigid member 40 is overlapped on the side walls 30A or 36D of each of the containers 30. That is, the rigid member 4 is held between the fuel supply mechanism 3 and the membrane electrode assembly 2. The cover plate 21 is superposed on the rigid member 40 that holds the membrane electrode assembly 2 between the fuel supply mechanism 3 including the container 30, and is connected to the fuel supply mechanism 3. In particular, in order to reduce the size and assembly workability of the fuel cell 1, the cover 21 is connected to the fuel supply mechanism 3 via at least one side or the opposite side of the fuel cell 1 via bending (riveting). It is better to conclude it. In the case of the container 30 shown in Fig. 4, in the long side L1 and the long side L2 of the fuel cell 1, the cover plate 2 is joined to the container 3 constituting the fuel supply mechanism 3 by bending. That is, the end portions of the cover plate 2 1 along the long side L1 and the long side L 2 are bent along the outer circumference of the membrane electrode assembly 2, the side walls 3 6 C of the container 30, and the side walls 3 6 D, respectively. And bent on the back side of the container 30. Further, in the short side S 1 and the short side S2, the cover 2;! is joined to the container 30 by means of screw fixing or rivet joining. That is, the end portions of the cover plate 2 1 along the short side S 1 and the short side S 2 are overlapped with the side walls 36A and the side walls 36B of the container 30 of the-14-201044675, and the through holes H1 and H2 are fixed by screws or The rivets are joined to join. However, for the rigid member 40, a through hole which communicates with each of the through holes Η 1 and H2 is formed at a position 'the side of the side wall 3 6 a and the side wall 3 6 b of the valley 3 ,, and is fixed by screws or rivets. The joint is joined to the lid 2 i at the same time as the container 3 〇. The cover member 2 is formed by using a relatively low-rigidity material, that is, a material which is easily bent, and the rigid member 4 is formed using a material having a higher rigidity than the cover plate 2 1 . Further, in a state in which the constituent members of the plurality of D MF C stacked between the fuel supply mechanism 3 and the fuel supply mechanism 3 are held via the rigid member 40, the cover plate 2 is attached to the covered rigid member 40, and the cover plate 2 is processed by bending. The end of 1 is connected to the fuel supply mechanism 3. Thereby, the rigid member 40 is appropriately pressurized via the cover plate 2 1 . Therefore, the rigid member 40 is formed by omitting the DMFC constituent member including the membrane electrode assembly 2, and pressurizing it under uniform and moderate pressure. Since the cover plate 21 is connected to the fuel supply mechanism 3, the pressurized state via the rigid Q member 40 is maintained. Accordingly, the film electrode assembly 2 can be uniformly and appropriately pressurized in order to improve the workability to be concluded. Therefore, the fuel cell 1 which is stable and has sufficient output can be provided. Further, it is assumed that even if the cover plate 21 is bent, the vicinity of the central portion thereof is curved in a direction away from the rigid member 4, as long as the rigid member 4'' is pressed at the peripheral portion of the cover plate 2 by the rigid member 40. It is preferable to maintain the uniform and moderate pressure of the membrane electrode assembly 2, however, the cover 21 is preferably formed on at least one side by bending the container 30 to -15-201044675, and for the fuel cell 丨It may be concluded by the bending process to the fuel supply mechanism 3. Further, in the case where the bending process is difficult or the bending strength is required, the cover plate 2 is attached to at least one of the barges 30, and θ' is joined by screwing or rivet bonding to form the rigid member 40 described above. The opening portion 4B having a through hole communicating with the 2 1 Α of the cover plate 2 1 . The opening portion 4A and the opening have the same shape and are formed at the same interval. According to such a configuration, the cathode gas of the fuel cell 1 is ensured through the opening of the rigid member 4 and the opening 21' of the cover 21. Therefore, it is possible to maintain an environment suitable for the fuel cell i without 'blocking the discharge of the gas generated by the introduction of oxygen necessary for power generation. The aforementioned fuel supply mechanism 3 is formed to have a lower rigidity than the cover plate 2 1 . In the fuel supply mechanism 3, the rigidity of the DMFC-constituting member distribution plate 3 1 including the membrane electrode assembly 2 and the container 30 combined with each other is relatively high. form. That is, for example, in the case where the rigidity of the fuel distribution plate 31 and the container 30 is bent by the connection with the cover plate 2, the DMFC constituent members including the membrane electrode assembly 2 are in a state of being close to each other. 'A member with a relatively high rigidity, the shape is better. Then, not only the rigid member 40 but also the fuel supply side 4, the processing, and the power generation of the opening portion 21 A portion 40 A side and the power generation of the high ground member 40 are low. . In other words, it is preferable to maintain the rigidity of the clamping mechanism 3 - 16 - 201044675 which is higher than that of the cover plate 2 1 . The rigid member 40 described above is formed via a single plate. For example, the rigid member 40 is formed by a relatively thick plate 5, but is not limited thereto. However, the rigid member 40 may be constructed by laminating two sheets. That is, the laminated plurality of sheets are relatively low-rigid, and as the rigid member 40, the total rigidity may be formed by the cover Q. However, the rigidity here means the following: First, the end portion of the rigid member or the center portion of the flat surface of the cover plate is fixed, and the load generated at the center portion is measured. The load required to produce its 1 mm displacement is high. However, the "end portion" here refers to the position of one end of the fingerboard to a distance corresponding to a distance of one end portion from the plane direction of 10% or less. Further, in the case of the Q end portion, the bent portion is formed as an end portion. As an example, when the cover plate 21 and the rigid member 40 are formed of, for example, stainless steel (SUS), the thickness of the rigid member 40 is thicker than that of the cover plate 2 1. The necessary rigidity is ensured as the rigid member 40. The thickness of 40 is preferably 0.5 mm or more. In the case where such a 40 is applied, regardless of the thickness of the cover 21 or the deformation of the rigidity 40 itself, it is possible to form a member in a uniform and appropriate manner in the plane.
材加以構成。在 :不鏽鋼（SUS ) 以上的板材而加 性的薄板材之構 板21爲高地加 法所定義者。 端部，各壓下在 1 m m變位所需 重爲大者，判斷 從剛性構件或蓋 另一端之間的距 對於彎曲蓋板之 經由同一材料， 度越厚剛性爲高 以形成。 性上，剛性構件 厚度之剛性構件 ，抑制剛性構件 壓力加壓DMFC -17- 201044675 在另一方面，當剛性構件4 〇之厚度過厚時，燃料電 池1的重量則增加，另外，燃料電池]的厚度亦增加。因 此’剛性構件4〇的厚度乃i ·0mm以下者爲佳。作爲總合 ’剛性構件40之厚度乃〇_6mm〜〇.8mm之範圍更佳。 (實施例） 作爲貫施例，如圖5所示，於收容於容器3 〇之膜電 極接合體2的陰極1 6側’配置板狀體2 〇，更且於其板狀 體2〇上’配置剛性構件4〇。其剛性構件4〇係經由不鏽鋼 加以形成，其厚度乃作爲0.7 m m。 呈被覆剛性構件4〇及容器30地配置蓋板21。其蓋板 21係經由彎曲加工而締結於容器3 0。如此之蓋板2 1係經 由不鏽鋼加以形成’其厚度乃作爲〇.3mm。 對於使用之剛性構件4 0及蓋板2 1之剛性，經由既已 敘述之方法而確認過。其結果，將對於使蓋板2 1之中央 部變位1 mm所需的荷重作爲1之情況，對於使剛性構件 4〇之中央部變位1 mm所需的荷重爲4。 在如此之實施例中，蓋板2 1之彎曲加工乃可容易進 行’且在彎曲加工後，經由蓋板2 1及剛性構件4 0 ,可均 一地加壓膜電極接合體2者。 作爲比較例，如圖6所示，於收容於容器3 0之膜電 極接合體2的陰極1 6側，配置板狀體2 0，更且於其板狀 體20上，配置蓋板2 1。如此之蓋板21係經由不鏽鋼加以 形成，其厚度乃作爲1 . Omm。另外，經由既已敘述之方法 -18- 201044675 而確認其蓋板2 1之剛性結果，將對於使在實施例所使用 之厚度〇.3mm的蓋板之中央部變位lnim所需的荷重作爲 1之情況’對於使比較例1之蓋板21之中央部變位1 m m 所需的荷重爲6。 在如此之比較例1中’雖得到高剛性，但彎曲加工則 變爲困難，無法進行蓋板21與容器3 0之締結。雖爲當然 ，仍無法均一地加壓膜電極接合體2者。 0 作爲比較例2，如圖7所示，於收容於容器3 〇之膜電 極接合體2的陰極1 6側，配置板狀體2 0，更且於其板狀 體2 0上，配置在實施例所使用之蓋板2 1。其蓋板2 1係經 由不鏽鋼加以形成，其厚度乃作爲〇.3mm。 在如此之比較例2中，雖可容易進行彎曲加工，可進 行蓋板21與容器3 0之締結，但蓋板21之剛性不充分， 在彎曲加工之後’彎曲於從膜電極接合體2離間之方向。 雖爲當然，仍無法均一地加壓膜電極接合體2者。 〇 如以上說明，如根據本實施形態，可提供可進行膜電 極接合體之均一的加壓同時，可提昇加工性，可得到安定 且充分之輸出的燃料電池。 上述之實施形態之燃料電池1係在使用各種之液體燃 料之情況’發揮效果，並無限定液體燃料之種類或濃度之 構成。但使燃料分散於面方向之同時而供給之燃料供給部 3X係特別在燃料濃度爲濃之情況爲有效。因此，實施形 態之燃料電池1係在將濃度爲8 Owt%以上之甲醇作爲液體 燃料而使用之情況，可特別發揮其性能或效果。隨之，實 19- 201044675 施形態係對於將甲醇濃度爲80wt%以上之甲醇水溶液或純 甲醇作爲液體燃料而使用之燃料電池1爲最佳。 更且’上述之實施形態係對於將本發明適用於半被動 型之燃料電池1的情況已做過說明，但本發明並不局限於 此’對於內部氣化型之純被動型之燃料電池而言，亦可適 用。 然而’本發明係可適用於使用液體燃料之各種燃料電 池者。另外，燃料電池之具體的構成或燃料之供給狀態亦 無特別加以限定，而對於供給於Μ E A之所有燃料乃液體 燃料之蒸氣’所有爲液體燃料，或一部分以液體狀態所供 給之液體燃料之蒸氣等各種形態，可適用本發明。在實施 階段中，在不脫離本發明之技術思想的範圍，可將構成要 素進行變形而作具體化。更且，可做適宜地組合上述實施 形態所不之複數的構成要素’或從實施形態所示之全構成 要素刪除幾個構成要素等各種變形。本發明之實施形態係 可在本發明之技術思想的範圍內進行擴張或變更者，其擴 張、變更之實施形態亦包含於本發明之技術範圍者。 【圖式簡單說明】 圖1乃顯示有關本發明之一實施形態的燃料電池之陰 極側的外觀平面圖。 圖2乃槪略性地顯示將圖1所示之燃料電池，沿著第 i方向切斷之剖面構造圖。 圖3乃槪略性地顯示將圖1所示之燃料電池，沿著第 -20- 201044675 2方向切斷之剖面構造圖。 圖4乃顯示構成可適用於圖i所示之燃料電池的燃料 供給部之容器外觀斜視圖。 圖5乃實施例之燃料電池的槪略剖面圖。 圖6乃比較例〗之燃料電池的槪略剖面圖。 圖7乃比較例2之燃料電池的槪略剖面圖。 0 【主要元件符號說明】 1 :燃料電池 2 ·’膜電極接合體 3 :燃料供給機構 3 X :燃料供給部 4 =燃料收容部 5 :流路 1 1 :陽極觸媒層 Q 1 2 :陽極氣體擴散層 1 3，1 3 1〜1 3 4 :陽極（燃料極） 1 4 :陰極觸媒層 胃 1 5 :陰極氣體擴散層 16，161〜164:陰極（空氣極） 1 7 ··電解質膜 2〇 :板狀體 21 :蓋板 21A，40A:開口部 -21 - 201044675 3 0 :容器 3 1 :燃料分配板 30Α :燃料導入口 3 2 :燃料注入口 3 3 :燃料排出口 3 5 :底面 36Α〜36D:側壁 40 :剛性構件 Η 1 :貫通孔 C〜C4 :集電體 -22 -The material is constructed. The sheet 21 of the thin sheet which is added to the sheet of stainless steel (SUS) or more is defined by the high ground addition. At the end, the weight required to be displaced at 1 m m is determined to be greater, and it is judged that the distance from the rigid member or the other end of the cover is formed by the same material as the curved cover is thicker and thicker. Sexually, a rigid member having a rigid member thickness, suppressing the rigid member pressure pressurization DMFC -17- 201044675 On the other hand, when the thickness of the rigid member 4 is too thick, the weight of the fuel cell 1 is increased, and in addition, the fuel cell] The thickness also increases. Therefore, it is preferable that the thickness of the rigid member 4 is not more than 0 mm. The thickness of the rigid member 40 is preferably in the range of 〇6 mm to 〇.8 mm. (Example) As a general example, as shown in Fig. 5, the plate-like body 2 is disposed on the cathode 16 side of the membrane electrode assembly 2 accommodated in the container 3, and the plate-like body 2 is placed on the plate-like body 2 'Configure the rigid member 4〇. The rigid member 4 is formed of stainless steel and has a thickness of 0.7 m. A cover plate 21 is disposed to cover the rigid member 4A and the container 30. The cover plate 21 is joined to the container 30 via bending. Such a cover plate 2 1 is formed of stainless steel, and its thickness is 〇.3 mm. The rigidity of the rigid member 40 and the cover 21 used was confirmed by the method described above. As a result, the load required to displace the center portion of the cover 2 1 by 1 mm was set to 1, and the load required to displace the center portion of the rigid member 4 to 1 mm was 4. In such an embodiment, the bending of the cover 21 can be easily performed, and after the bending process, the membrane electrode assembly 2 can be uniformly pressurized via the cover 21 and the rigid member 40. As a comparative example, as shown in FIG. 6, the plate-like body 20 is placed on the cathode 16 side of the membrane electrode assembly 2 housed in the container 30, and the cover plate 2 is placed on the plate-like body 20. . The cover plate 21 is formed of stainless steel and has a thickness of 1.0 mm. Further, the rigidity of the cover plate 2 is confirmed by the method -18-201044675 which has been described, and the load required to displace the central portion of the cover plate having a thickness of 〇3 mm used in the embodiment is taken as In the case of 1 'the load required to displace the center portion of the cover 21 of Comparative Example 1 by 1 mm was 6. In Comparative Example 1, the rigidity was obtained, but the bending process became difficult, and the connection between the lid 21 and the container 30 could not be performed. Of course, the membrane electrode assembly 2 cannot be uniformly pressurized. As a comparative example 2, as shown in FIG. 7, the plate-like body 20 is disposed on the cathode 16 side of the membrane electrode assembly 2 accommodated in the container 3, and is disposed on the plate-like body 20, The cover plate 2 used in the embodiment. The cover plate 2 1 is formed of stainless steel and has a thickness of 〇.3 mm. In Comparative Example 2, the bending process can be easily performed, and the cover 21 and the container 30 can be joined. However, the rigidity of the cover 21 is insufficient, and the bending is performed after being bent from the membrane electrode assembly 2. The direction. Of course, it is not possible to uniformly pressurize the membrane electrode assembly 2 . As described above, according to the present embodiment, it is possible to provide a fuel cell which can perform uniform pressurization of the membrane electrode assembly and can improve workability and obtain stable and sufficient output. The fuel cell 1 of the above embodiment exerts an effect in the case of using various liquid fuels, and does not limit the type or concentration of the liquid fuel. However, the fuel supply unit 3X that supplies the fuel while being dispersed in the surface direction is effective particularly when the fuel concentration is rich. Therefore, the fuel cell 1 of the embodiment is particularly useful in the case where methanol having a concentration of 80% by weight or more is used as a liquid fuel. In the meantime, the fuel cell 1 used as a liquid fuel in which a methanol aqueous solution having a methanol concentration of 80% by weight or more or pure methanol is used as the liquid fuel is preferred. Further, the above embodiment has been described for the case where the present invention is applied to the semi-passive type fuel cell 1, but the present invention is not limited to this 'for the internal gasification type pure passive type fuel cell. Words can also be applied. However, the present invention is applicable to various fuel cells using liquid fuel. Further, the specific constitution of the fuel cell or the supply state of the fuel is not particularly limited, and the vapor supplied to all the fuels supplied to the EA is liquid fuel, or a part of the liquid fuel supplied in a liquid state. The present invention can be applied to various forms such as steam. In the implementation stage, the constituent elements can be modified and embodied without departing from the scope of the technical idea of the present invention. Further, various modifications such as the constituent elements of the above-described embodiments may be combined as appropriate, or several constituent elements may be deleted from the entire constituent elements of the embodiment. The embodiment of the present invention can be expanded or changed within the scope of the technical idea of the present invention, and the embodiments of the invention are also included in the technical scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view showing the appearance of a cathode side of a fuel cell according to an embodiment of the present invention. Fig. 2 is a schematic cross-sectional structural view showing the fuel cell shown in Fig. 1 taken along the i-th direction. Fig. 3 is a schematic cross-sectional structural view showing the fuel cell shown in Fig. 1 taken along the direction of -20 - 201044675 2 . Fig. 4 is a perspective view showing the appearance of a container constituting a fuel supply portion applicable to the fuel cell shown in Fig. i. Figure 5 is a schematic cross-sectional view of the fuel cell of the embodiment. Figure 6 is a schematic cross-sectional view of a fuel cell of a comparative example. Fig. 7 is a schematic cross-sectional view showing the fuel cell of Comparative Example 2. 0 [Description of main component symbols] 1 : Fuel cell 2 · 'membrane electrode assembly 3 : fuel supply mechanism 3 X : fuel supply portion 4 = fuel storage portion 5 : flow path 1 1 : anode catalyst layer Q 1 2 : anode Gas diffusion layer 1 3,1 3 1~1 3 4 : anode (fuel electrode) 1 4 : cathode catalyst layer stomach 1 5 : cathode gas diffusion layer 16, 161 to 164: cathode (air electrode) 1 7 ··electrolyte Membrane 2: Plate-like body 21: Cover plate 21A, 40A: Opening portion-21 - 201044675 3 0 : Container 3 1 : Fuel distribution plate 30 Α : Fuel introduction port 3 2 : Fuel injection port 3 3 : Fuel discharge port 3 5 : bottom surface 36Α~36D: side wall 40: rigid member Η 1 : through hole C~C4: current collector -22 -