Water Movement in a Solid-State Alkaline Fuel Cell Affected by the Anion-Exchange Pore-Filling Membrane Properties
Water Movement in a Solid-State Alkaline Fuel Cell Affected by the Anion-Exchange Pore-Filling Membrane Properties
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DOI：
10.1021/jp405088s
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发表时间：
2013-08
影响因子：
3.7
通讯作者：
Hangzhou Zhang;H. Ohashi;Takanori Tamaki;Takeo Yamaguchi
中科院分区：
文献类型：
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作者：
Hangzhou Zhang;H. Ohashi;Takanori Tamaki;Takeo Yamaguchi
与质子交换膜燃料电池(PEMFC)不同的是，在固态碱性燃料电池(SAFC)中，水在阴极反应，在阳极产生。这种系统性的差异导致了小岛屿发展中国家水管理面临的新挑战。为了探讨水在电池中的运动与电池性能的关系，我们以3-甲基丙烯酰胺丙基三甲基氯化铵和苯乙烯为电解质单体，采用填孔技术合成了不同的亲水/疏水阴离子交换膜。我们发现，通过改变AEM的性质，电池的性能发生了显著的变化。水在电池中的运动对电池的性能有很大影响，这也取决于AEM的性质。在高亲水性的膜中，水的运动方向是从阳极到阴极，这可以增加阴极的相对湿度(RH)，从而改善离子电导率，抑制阳极处的泛滥。相反，结果是相反的.
In contrast with proton-exchange membrane fuel cells (PEMFCs), in a solid-state alkaline fuel cell (SAFC) water reacts at the cathode and is generated at the anode. This systematic difference leads to the new challenge of water management for SAFCs. To explore the relationship between water movement in the cell and cell performance we used 3-methacryloylamino propyl trimethylammonium chloride and styrene as the electrolyte monomers to synthesize different hydrophilic/hydrophobic anion-exchange membranes (AEMs) using a pore-filling technique. We discovered that the cell performance changed remarkably by changing the AEM properties. The cell performance was affected significantly by the water movement in the cell, which also depends on the AEM properties. In a highly hydrophilic membrane, the water movement direction is from the anode to the cathode, which can increase the cathode relative humidity (RH) to improve the ion conductivity and suppress flooding at the anode. In contrast, the result is the opposi...