Influence of the Sintering of Electrocatalysis and Descrease of Proton Conductivity on the Current-Voltage Performance in the High-Temperature Proton Exchange Membrane Fuel Cells (HT-PEMFC)
Influence of the Sintering of Electrocatalysis and Descrease of Proton Conductivity on the Current-Voltage Performance in the High-Temperature Proton Exchange Membrane Fuel Cells (HT-PEMFC)
复制标题
电催化烧结和质子电导率降低对高温质子交换膜燃料电池（HT-PEMFC）电流电压性能的影响
DOI：
10.1149/06113.0007ecst
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Akira Miyamoto
中科院分区：
文献类型：
--
作者：
Ai Suzuki;Mark Williams;Yuka Oono;Ryuji Miura;Nozomu Hatakeyama;Michio Hori;Akira Miyamoto
在150 ℃、170 ℃和190 ℃的非湿润条件下，从理论上研究了电催化剂烧结和质子电导率降低对HT-PEMFC电流-电压特性的影响。基于质子通过的弯曲度评价质子传导率的降低速率。随着温度的升高，磷酸蒸发得越多，发现质子路径变得越曲折，因此估计质子电导率降低。电压降的理论分解表明，在前几百小时内，电催化剂的烧结对电压降有影响。在后一阶段中的随后的电压降主要是由于质子传导率的降低而引起的。
The influence of the sintering of electrocatalysts and decrease of the proton conductivity on the current-voltage performance in the HT-PEMFC was theoretically evaluated under the non-humid conditions at 150 C, 170 C and 190 C. Decreasing rate of the proton conductivity was evaluated based on the tortuosity of the proton pass. The more the phosphoric acid was evaporated with a rise in temperature, the proton path found to become more tortuous and the proton conductivity was accordingly estimated to be decreased. A theoretical breakdown of the voltage drops indicated that the sintering of the electrocatalyst influenced on the voltage drop in earlier several hundreds of hours. The following voltage drop in the latter stage was caused mainly due to the decrease in the proton conductivity.