The Effect of CO2 Bubble Distribution on Power Generation Performance of a Direct Formic Acid Fuel Cell
The Effect of CO2 Bubble Distribution on Power Generation Performance of a Direct Formic Acid Fuel Cell
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CO2气泡分布对直接甲酸燃料电池发电性能的影响
DOI：
10.1149/09208.0335ecst
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Tsujiguchi Takuya
中科院分区：
文献类型：
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作者：
Watanabe Konosuke;Araki Takuto;Inoue Gen;Mochizuki Ryota;Tsujiguchi Takuya
与其他直接液体燃料电池相比，直接甲酸燃料电池（dafcs）具有更高的功率密度，因此受到了广泛的关注。然而，当产生的CO2气泡滞留在阳极多孔输运层（PTL）中时，dafcs的性能会下降。在本研究中，研究了两种类型的PTL，即碳纸和碳布的dafcs发电特性。实验结果表明，碳布的最大电流密度比碳纸高约60 mA/cm2。利用x射线计算机断层扫描技术对阳极PTL中的CO2气泡分布进行了可视化分析，结果表明PTL的结构影响了CO2气泡分布，甲酸在液相中的输运路径受到了干扰。由此可见，CO2气泡的输运特性会影响dafcs的发电特性。
Direct formic acid fuel cells (DFAFCs) have received considerable attention because they can generate higher power density compared with other direct liquid fuel cells. However, when the generated CO2 bubbles are retained in the anode porous transport layer (PTL), the performance of DFAFCs deteriorates. In this study, power generation characteristics of DFAFCs using two types of PTL, viz. carbon paper and carbon cloth, were investigated. It was found that the maximum current density is about 60 mA/cm2 higher with the carbon cloth than with the carbon paper. The CO2 bubble distributions in anode PTLs were visualized during the operation using X-ray computed tomography, and the visualized images showed that the PTL structure affected the CO2 bubble distribution, and that the transport paths of formic acid through liquid phase are tortured. Thus, it could be concluded that the transport characteristics of CO2 bubbles affect the power generation characteristics of DFAFCs.