Development of non-perfluorinated hybrid materials for single-cell proton exchange membrane fuel cells
Development of non-perfluorinated hybrid materials for single-cell proton exchange membrane fuel cells
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用于单电池质子交换膜燃料电池的非全氟杂化材料的开发
DOI：
10.1016/j.ijhydene.2012.08.082
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发表时间：
2012
影响因子：
7.2
通讯作者：
B. Rambabu
中科院分区：
文献类型：
--
作者：
U. Thanganathan;David D. Dixon;Sundara L. Ghatty;B. Rambabu
为了降低成本，设计一类杂化膜，并构建各种结构的质子交换膜燃料电池(PEMFC)的膜-电极-组件(MEA)，需要开发在100℃下工作的低温燃料电池。本工作制备了PVA/PMA/SiO_2杂化复合膜，并通过阻抗法测定了复合膜的电导率。在80℃和100%相对湿度(RH)下，电导率达到最大值4.2x×10−3s/cm。通过动电势分析和电流-电压(I-V)曲线确定了不同MEA的电流密度。在80℃、100%相对湿度下，获得最大电流密度为635 mA/cm2。据我们所知，这是第一次报道用于低温运行的PVA基电解液的高电流密度。用X射线衍射仪和傅里叶变换红外光谱仪对其结构进行了表征，用DSC和TGA技术对其热性能进行了研究，并对结果进行了讨论。补充)。研究表明，单电池的性能主要取决于膜的温度、相对湿度和化学成分。
Development of low temperature fuel cells that operate under 100 °C are needed to reduce the costs, to design a class of hybrid membranes and to construct various structures of membrane-electrode-assembles (MEAs) for proton exchange membrane fuel cells (PEMFC). In this work, PVA/PMA/SiO2hybrid composite membranes were synthesized and their conductivities were determined by impedance measurements. We found a maximum conductivity value of 4.2 × 10−3S/cm at 80 °C and 100% relative humidity (RH). A fuel cell test evaluation for various MEAs was conducted by the potentiodynamic analysis and the current density values were determined from the current–voltage (I–V) curves. A maximum current density of 635 mA/cm2was obtained at 80 °C and 100% RH. To the best of our knowledge, this is the first time that a high current density of PVA-based electrolytes for PEMFCs operating at low temperature is reported. The structural characters were examined using of XRD and FTIR methods, and thermal properties were studied using DSC and TGA techniques and the results were discussed (cf. supplementation). The present study revealed that the single cell performance depends mainly on the temperature, relative humidity and chemical compositions of the membranes.