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首页> 外文期刊>International Journal of Electrochemical Science >Effect of Dispersion Solvent in Catalyst Ink on Proton Exchange Membrane Fuel Cell Performance
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Effect of Dispersion Solvent in Catalyst Ink on Proton Exchange Membrane Fuel Cell Performance

机译：催化剂油墨中分散溶剂对质子交换膜燃料电池性能的影响

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The effects of dispersion solvents in catalyst ink on performance of the membrane electrode assembly(MEA) for proton exchange membrane fuel cell are studied. Dispersion solvents under examinationare water, ethylene glycol, glycerin, propylene glycols, and methanol. These solvents cover a widerange property of dielectric constant, boiling points, and viscosity. We examine the rheology behaviorsof catalyst ink prepared with these solvents. Both anode and cathode of the MEA are made by usingdoctor-blade method to spread catalyst ink onto the gas diffusion layers. The single cell with preparedMEA is measured by linear scanning voltammetry to evaluate the discharge characteristics, by cyclicvoltammetry to evaluate catalyst utilization, and electrochemical impedance spectroscopy to evaluateinternal resistance. A semi-empirical equation is use to analyze the voltage losses due to activationover-potential and internal resistance. We find that ethylene glycol was the best dispersion agentamong organic solvents tested. The power density of the single cell is able to reach the maximum-1 o power density of 1,428 mA (mg Pt) at hot-pressed temperature of 135 C, and 1200psi for 90seconds.
机译：研究了催化剂油墨中分散溶剂对质子交换膜燃料电池膜电极组件（MEA）性能的影响。检查中的分散溶剂为水，乙二醇，甘油，丙二醇和甲醇。这些溶剂涵盖介电常数，沸点和粘度的广泛特性。我们研究了用这些溶剂制备的催化剂墨水的流变行为。 MEA的阳极和阴极均采用医生刮刀法将催化剂油墨散布到气体扩散层上而制成。通过线性扫描伏安法测量具有制备的MEA的单电池，以评估放电特性，通过循环伏安法测量，以评估催化剂的利用率，并通过电化学阻抗谱来评估内部电阻。使用半经验方程来分析由于激活过电势和内部电阻引起的电压损失。我们发现乙二醇是测试的有机溶剂中最好的分散剂。在135 C的热压温度和1200psi的90秒下，单电池的功率密度能够达到1,428 mA（mg Pt）的最大1 o功率密度。

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