燃料電池邊框膜作用
邊框膜由TEONEX? PEN薄膜(如果需要,還包括 PEEK 或 PPS)制成的副墊片薄膜具有耐用性、自動化生產線上的良好加工性能以及在 CCM 環境中的中性。
邊框膜的任務:
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支撐箔使 MEA 保持張緊
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它可靠地將介質(H2、O2)彼此分離
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它可以密封系統以防泄漏
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框架箔有助于自動化組裝(Picture-Frame Catalyst Coated Membrane;膜電極組裝)。
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使用薄箔時,可實現盡可能高的封裝密度(減小設備尺寸)
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與 CCM 邊緣的粘合不明顯,因此可以選擇非常窄(盡可能小的重疊)
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MEA 膜不會因粘合劑或箔而"中毒"
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質 子 交 換 膜 燃 料 電 池 ( proton exchange membrane fuel cell,PEMFC)具有能量轉化效率高、比能量大、啟動迅速和環境友好等優點,是未來效率 最高及最清潔的發電技術之一。PEMFC最關鍵的組件是膜電極( membrane electrode assembly, MEA)。 它由質子交換膜、電催化層和氣體擴散層 組成,是PEMFC電化學反應能高效進行的核心。 膜電極的制備技術不僅直接影響電池性能,而且對降低電池成本、提高電池比功率和比能量至關重要。 在 PEMFC 的研發進程中,曾經提出過多種制備MEA的方法。這些方法大致可以分成兩類,一類是以熱壓法為代表,即把催化劑漿料涂覆在碳紙等載體上,然后通過熱壓使催化層與質子交換膜結合在一起;另一類是直接把催化劑漿料涂覆在質子交換膜上,形成CCM(catalyst coated membrane),然后與氣體擴散層組成膜電極,這種方法通常被簡稱為CCM法。
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CMC Klebetechnik provides the bonding solution to ensure maximum operational reliability with minimum overall height in fuel cells. In addition to the?CCM (Catalyst Coated Membrane), the gas diffusion layers (GDL) and the subgasket foil are the components of the?membrane electrode assembly (MEA)?- the central element of a?PEM fuel cell.
CMC Klebetechnik's?subgasket films?made of TEONEX? films (also PEEK or PPS if required) are designed for durability, good processability on automated production lines and neutrality in the environment of the CCM.
Tasks of the sub-gasket foil:
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the supporting foil keeps the MEA tensioned
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it reliably separates the media (H2, O2) from each other
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it seals the system against leakage
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the frame foil facilitates automated assembly (Picture-Frame Catalyst Coated Membrane; Membrane Electrode Assembly).
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When using thin foil, the highest possible packing densities are achieved (reduced device size)
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Bonding to the edge of the CCM is not noticeable and can therefore be selected to be very narrow (smallest possible overlap)
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No "poisoning" of the MEA membrane due to adhesive or foil
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https://en.cmc.de/page/hydrogen-technology-fuell-cells