研究运行条件和NO2阴极污染对PEM燃料电池的影响,使用放松时间的分布函数分析
W Khalaily1, S Bhowmick1, Y Tsur1,2
1The Department of Chemical Engineering, Technion-Israel Institute of Technology, Haifa, Israel.
ChemSusChem
|September 1, 2024
概括
这项研究研究了二氧化 (NO2) 对聚合物电解质膜燃料电池 (PEMFC) 的影响,发现冲洗有效地再生性能,特别是在较低的温度下. 电化学阻抗光谱和遗传算法确定了污染影响.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 聚合物电解质膜燃料电池 (PEMFC) 对清洁能源至关重要.
- 像二氧化 (NO2) 这样的空气污染物可以降低PEMFC的耐用性和性能.
- 了解NO2对电化学过程的影响对于燃料电池的寿命至关重要.
研究的目的:
- 研究NO2污染对PEMFC耐用性和电化学过程的影响.
- 用先进的建模分析NO2如何影响燃料电池内的各种现象.
- 评估减缓战略对绩效再生的有效性.
主要方法:
- 在不同温度和相对湿度 (RH) 下进行现场电化学阻抗光谱 (EIS).
- 使用基因编程阻抗光谱 (ISGP) 基因算法对EIS数据进行分析,以生成放松时间分布函数 (DFRT) 模型.
- 使用能量分散式X射线光谱 (EDS) 和循环电压计 (CV) 的污染后分析.
主要成果:
- ISGP成功地区分了受NO2污染影响的电化学现象.
- 该研究表明,冲洗PEMFC可以在NO2暴露后恢复性能.
- 性能再生在较低的操作温度下特别有效.
- 在污染后,EDS证实燃料电池组件中存在成分.
- CV显示了由于污染导致的阴极电化学活性表面积的变化.
结论:
- 二氧化物显著影响PEMFC电化学过程和耐用性.
- 该ISGP方法是有效的分析污染对燃料电池的影响.
- 冲洗是NO2诱导的PEMFC降解的一个可行的缓解策略.
- 对于先进的燃料电池应用,对污染物影响和减缓的进一步研究是有必要的.
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