Mitigating PEMFC Degradation During Start-Up: Locally Resolved Experimental Analysis and Transient Physical Modelling

Datasets related to pubblication: Elena Colombo et al 2021 J. Electrochem. Soc.  https://doi.org/10.1149/1945-7111/abf4eb

This paper discusses the results of an experimental and modelling activity devoted to the analysis of start-up/shut-down of PEM fuel cells under operative conditions representative of automotive applications, when mitigation strategies are implemented. The focus is on air start-ups after long stops, when permeated air into the anode could not be avoided. A transient and physical 2D model was developed, incorporating the main electrochemical reactions and pseudo-capacitive contributions, calibrated on specific experiments and validated on local measurements of potential and current. Through the simulations, the impact of each phenomenon was separated in the complex dynamics of the process, elucidating the key role of platinum oxides. The experimental measurements comprise the local potentials, provided by through-plate Reference Hydrogen Electrodes, and the in-plane currents, measured among four regions of a segmented hardware. A systematic study of mitigation strategies based on stressors is presented, like: anode flow rate, oxygen dilution and temperature. Their effectiveness results from the ability in reducing either the process duration or the maximum potential. The model helps in interpreting the observed changes and to obtain trends of corroded carbon as a function of stressors; a controlling role is played by the anode flow velocity and the anodic oxygen concentration.

与下述学术论文相关的数据集：Elena Colombo 等人，2021年，《Journal of the Electrochemical Society（J. Electrochem. Soc.）》，DOI：10.1149/1945-7111/abf4eb。
本论文探讨了针对汽车应用典型工况下、实施缓解策略时质子交换膜（Proton Exchange Membrane, PEM）燃料电池启动/停机过程的实验与建模研究成果。研究重点聚焦于长时停机后、渗透进入阳极的空气无法完全避免的阳极侧空气启动过程。
本研究构建了一款瞬态物理二维模型，纳入了主要电化学反应与伪电容效应，基于专属实验数据完成校准，并通过电位与电流的本地实测值完成验证。通过仿真分析，该模型可拆解复杂过程动态中各现象的影响机制，阐明了氧化铂的关键作用。
本次实验实测数据包含穿板式参比氢电极（Through-plate Reference Hydrogen Electrodes）采集的本地电位，以及分段式测试硬件四个区域间测得的面内电流。本研究针对以各类应力参数为核心的缓解策略开展系统性探究，涵盖阳极流速、氧气稀释与温度等手段；此类策略的有效性体现为可缩短过程总时长或降低峰值电位。
该模型可辅助解释观测到的变化规律，并可推导腐蚀碳随应力参数变化的演化趋势；其中阳极流速与阳极侧氧浓度发挥着核心调控作用。