燃料电池研究中的电池测试方法
Battery Testing Methods in Fuel Cell Research
摘要:
本文介绍了燃料电池研究中使用的一些关键实验室电化学电池测试方法。伏安法、计时电流法、计时电位法和电化学阻抗谱等方法是非常重要的。所有电化学腐蚀测试均通过电解质溶液中的三电极极化池装置进行,该装置包含参比电极、对电极和工作电极(感兴趣的金属样品)。所有三个电极都连接到恒电位仪。金属的腐蚀通过氧化还原反应发生。所有上述测试方法可以通过操纵来自电池的电流和电压响应来执行。恒电位实验(伏安法和计时电流法)使用工作电极处的恒定电位进行,并在恒电流实验(计时电位法)时记录电流响应,反之亦然。通过所有这些实验测得的数据可以提供关于反应可逆性、扩散系数、还原电位、化学反应速率、耐久性、吸附、电压损失和对电极材料提供的质量和电荷传输的有效电阻的非常有用的信息。
英文摘要:
This report presents some of the key laboratory electrochemical battery testing methods that are used in fuel cell research. Methods such as voltammetry, chronoamperometry, chronopotentiometry, and electrochemical impedance spectroscopy are of major importance. All the electrochemical corrosion tests are performed through a tri-electrode polarization cell setup containing a reference electrode, a counter electrode, and the working electrode (metal sample of interest) in an electrolyte solution. All three electrodes are connected to a potentiostat. Corrosion of metal occurs through an oxidation-reduction (redox) reaction. All the above testing methods can be performed by manipulating the current and voltage responses from the cell. Potentiostatic experiments (voltammetry and chronoamperometry) are performed using constant potential at the working electrode and recording the current response while galvanostatic experiments (chronopotentiometry) and vice versa. The measured data through all these experiments can provide very useful information regarding reaction reversibility, diffusion coefficient, reduction potential, rate of chemical reaction, durability, adsorption, voltage losses, and effective resistance to the mass and charge transport offered by electrode material.
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