An Electrochemical Impedance Spectroscopy Study and Two Phase Flow Analysis of the Anode of Polymer Electrolyte Membrane Water Electrolyser
An Electrochemical Impedance Spectroscopy Study and Two Phase Flow Analysis of the Anode of Polymer Electrolyte Membrane Water Electrolyser
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聚合物电解质膜水电解槽阳极的电化学阻抗谱研究及两相流分析
DOI：
10.1149/06803.0117ecst
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Dedigama I
中科院分区：
文献类型：
--
作者：
Dedigama I
在实验室常压槽(25 cm~2)上研究了水流量对聚合物电解质膜电解槽性能的影响。获得的线性极化曲线表明，在较高的电流密度下，电压增加，且随水流量的增加而增加。电化学阻抗谱(EIS)显示，虽然较低的水流量会导致较高的电池温度和较低的膜电阻，但在高电流密度下，传质损失占主导地位。由于水的流动完全处于泡状区，气泡的形成动力学和较高的水流率下气体孔隙率的降低导致了传质极限的增加。
The effect of water flow rate on the performance of a polymer electrolyte membrane water electrolyser (PEMWE) was studied using an unpressurised lab-scale (25 cm2) cell. The linear polarisation curves obtained showed a voltage increase at higher current densities that increased with water flow rate. Electrochemical impedance spectroscopy (EIS) showed that while lower water flow rates lead to higher cell temperatures and reduced membrane resistance, mass transport losses dominate at high current density. As the water flow is exclusively in the bubbly regime, increase in mass transport limitation is attributed to bubble formation dynamics and reduced gas void fraction at higher water flow rates.