燃料电池边框膜作用

燃料电池边框膜作用

边框膜由TEONEX® PEN薄膜（如果需要，还包括 PEEK 或 PPS）制成的副垫片薄膜具有耐用性、自动化生产线上的良好加工性能以及在 CCM 环境中的中性。

边框膜的任务：

支撑箔使 MEA 保持张紧
它可靠地将介质（H2、O2）彼此分离
它可以密封系统以防泄漏
框架箔有助于自动化组装（Picture-Frame Catalyst Coated Membrane；膜电极组装）。
使用薄箔时，可实现尽可能高的封装密度（减小设备尺寸）
与 CCM 边缘的粘合不明显，因此可以选择非常窄（尽可能小的重叠）
MEA 膜不会因粘合剂或箔而"中毒"

质子交换膜燃料电池 ( proton exchange membrane fuel cell,PEMFC)具有能量转化效率高、比能量大、启动迅速和环境友好等优点,是未来效率最高及最清洁的发电技术之一。PEMFC最关键的组件是膜电极( membrane electrode assembly, MEA)。它由质子交换膜、电催化层和气体扩散层组成,是PEMFC电化学反应能高效进行的核心。膜电极的制备技术不仅直接影响电池性能,而且对降低电池成本、提高电池比功率和比能量至关重要。在 PEMFC 的研发进程中,曾经提出过多种制备MEA的方法。这些方法大致可以分成两类,一类是以热压法为代表,即把催化剂浆料涂覆在碳纸等载体上,然后通过热压使催化层与质子交换膜结合在一起;另一类是直接把催化剂浆料涂覆在质子交换膜上,形成CCM(catalyst coated membrane),然后与气体扩散层组成膜电极,这种方法通常被简称为CCM法。

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:

the supporting foil keeps the MEA tensioned
it reliably separates the media (H2, O2) from each other
it seals the system against leakage
the frame foil facilitates automated assembly (Picture-Frame Catalyst Coated Membrane; Membrane Electrode Assembly).
When using thin foil, the highest possible packing densities are achieved (reduced device size)
Bonding to the edge of the CCM is not noticeable and can therefore be selected to be very narrow (smallest possible overlap)
No "poisoning" of the MEA membrane due to adhesive or foil

https://en.cmc.de/page/hydrogen-technology-fuell-cells

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