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为提高高温质子交换膜燃料电池(HT-PEMFC)的输出性能，本文设计了一种基于喷涂和电沉积工艺的正极双催化层结构。通过研究单电池在不同温度、压力以及正极空气化学计量比条件下的输出性能以及电化学阻抗，评估双催化层设计在宽工况下的可行性以及运行稳定性。实验结果表明：双催化层设计能够改善电极界面环境，有效缓解电沉积合成的纯Pt催化剂的中毒现象，双催化层HT‑PEMFC在氢空条件下运行的峰值功率密度值最大可达205 mW/cm2，且在本文所有运行工况中，仅在空气计量比为1.5时观察到电池出现运行不稳定现象。在进一步的电化学阻抗谱实验中，与150℃相比，190℃时正极传质阻抗增大了55.0%，欧姆阻抗降低了35.1%；压力从0增大至2×105 Pa时，正负电荷转移阻抗分别降低了44.6%和29.6%，正负极传质阻抗分别增加了57.1%和33.3%，略微促进了质子的传递；正极空气计量比从1.5增大至3.5时，正极电荷转移与传质阻抗分别降低了92.5%和71.7%，但过高的计量比不利于负极电荷转移过程。
Abstract：To enhance the output performance of high-temperature proton exchange membrane fuel cells(HT-PEMFC), this study designed a dual catalyst layer cathode based on spray-coating and electrodeposition. The feasibility and operational stability under wide operating conditions were evaluated through investigation on single cell output performance and electrochemical impedance under varying temperatures, pressures, and cathode air stoichiometric ratios. Experimental results demonstrated that the dual catalyst layer design improved the electrode interfacial environment, effectively mitigating poisoning of the electrodeposited pure Pt catalyst. HT-PEMFC with dual catalyst layer achieved a peak power density of 205 mW/cm2 under H2/air operating conditions, and in all operating conditions of this paper, the battery is only observed to be unstable when the air metering ratio is 1.5. In the further electrochemical impedance spectrum experiment, compared with 150 ℃, the cathode mass transfer impedance increased abnormally by 55.0% and the ohmic impedance decreased by 35.1% at 190 ℃. When the pressure increased from 0 to 2×105 Pa, the charge transfer resistances of cathode and anode by 44.6% and 29.6%, respectively, but increased mass transfer resistances by 57.1% and 33.3%,while slightly enhancing proton transport. when the air-to-cathode molar ratio increased from 1.5 to 3.5, the cathode air stoichiometric ratio decreased cathode charge transfer and mass transfer resistances by 92.5% and 71.7%, though excessive ratios adversely affected anode charge transfer process.
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基本信息:
DOI：10.19996/j.cnki.ChinBatlnd.2026.02.002
中图分类号:O646;O643.36;TM911.4
引用信息:
[1]郭其浩,郑东.双催化层HT-PEMFC的电化学性能实验研究[J].电池工业,2026,30(02):123-130+152.DOI:10.19996/j.cnki.ChinBatlnd.2026.02.002.
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