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首页> 外文会议>Meeting of the Electrochemical Society;International Meeting on Chemical Sensors >Effect of Elevated PEM Fuel Cell Operating Temperature (120°C and 140°C) and Membrane Thickness on Proton Conductivity for Combat Vehicle Use
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Effect of Elevated PEM Fuel Cell Operating Temperature (120°C and 140°C) and Membrane Thickness on Proton Conductivity for Combat Vehicle Use

机译：升高的PEM燃料电池工作温度（120℃和140°C）和膜厚度对战斗车辆使用的质子电导率的影响

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Energy required from ground vehicles in the United States (U.S.) Army is increasing due to the need for increased capabilities and mission duties required for an ever changing combat environment. These additional capabilities include silent watch (long term mounted surveillance), advanced radios/jamming devices/sensors, directed energy weapons, exportable power supporting stationary applications, and vehicle-to-grid connectivity. Increasing the combat vehicle energy output, while still fitting into the limited space inside each vehicle, requires an energy source that is compact, power dense and energy efficient. PEM Fuel Cells (PEMFCs) meet those requirements for primary and/or auxiliary power generators placed in vehicles for short or long-term mission roles. While PEMFCs provide a potential solution for the U.S. Army's vehicle energy requirements, there still exists a number of critical areas which need to be resolved before integration into combat vehicles is realized. These issues include: 1. Stack degradation from thermal-cycling and stack sealing loss, 2. Electrocatalyst degradation and 3. Cell membrane thermal degradation. In addition, specifically for the U.S. Army, vehicles significantly restrict heat rejection (due to low air flow from ballistic grills) to the PEMFC system in addition to vehicles operating in locations with elevated ambient temperatures, which can increase the stack operating temperature up to 140°C. Since cooling requirements for PEMFCs are typically engineered for operating temperatures closer to 65°C, these elevated stack temperatures could result in thermal degradation of the cell membrane.
机译：由于需要增加有效的战斗环境所需的能力和使命职责，美国在美国（美国）军队所需的能源正在增加。这些额外的功能包括静音手表（长期安装的监控），高级无线电/干扰设备/传感器，定向能量武器，配套静止应用的可通用电源，以及车辆到网格连接。增加战斗车能量输出，同时仍然适合每个车辆内的有限空间，需要一种紧凑，功率密集和节能的能量源。 PEM燃料电池（PEMFC）满足初级和/或辅助发电机的要求，用于短期或长期任务角色的车辆。虽然PEMFCS为美国军队的车辆能源要求提供了潜在的解决方案，但仍然存在许多需要在融入战斗车辆之前解决的关键区域。这些问题包括：1。堆叠从热循环和堆叠密封损失的劣化，2.电催化剂降解和3.细胞膜热降解。此外，除了美国陆军，车辆除了在具有升高的环境温度的地点的车辆外，车辆除了在具有升高的环境温度的车辆之外，车辆显着地限制了PEMFC系统的热量抑制（由于流量烤架）到PEMFC系统，这可以将堆叠工作温度增加到140 °C。由于PEMFC的冷却要求通常用于更接近65℃的操作温度，因此这些升高的堆叠温度可能导致细胞膜的热降解。

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