质子交换膜燃料电池电压损耗

赵阳; 王树博; 李微微; 谢晓峰

doi:10.16511/j.cnki.qhdxxb.2019.26.019

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清华大学学报（自然科学版） ›› 2020, Vol. 60 ›› Issue (3) : 254-262. DOI: 10.16511/j.cnki.qhdxxb.2019.26.019

核能与新能源工程

质子交换膜燃料电池电压损耗

赵阳, 王树博, 李微微, 谢晓峰

作者信息 +

Polarization of the membrane electrode assembly in a proton exchange membrane fuel cell

ZHAO Yang, WANG Shubo, LI Weiwei, XIE Xiaofeng

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摘要

质子交换膜燃料电池电压损耗的定量分析，对于寻求膜电极性能的提升空间具有重要的参考意义。该文以实验室自制的膜电极为研究对象，对其内部损耗、ohm极化、活化极化以及浓差极化依次进行了实验分析。结果表明：在阴极铂载量为0.2 mg/cm²的膜电极中，活化极化在整体电压损耗中所占比例最高，这一现象在低温下愈发明显；ohm极化的占比最小，电流密度为1 550 mA/cm²时，其最大值约为0.09 V；浓差极化在低电流密度区域的影响较小，在大电流密度区域以指数形式增长。经过对浓差极化的分析发现，40%~44%的氧气扩散阻力主要来源于气体扩散层内的分子扩散阻力，43%~50%的氧气扩散阻力主要来源于氧气穿过离聚物层到达铂表面的阻力。

Abstract

The performance of a proton exchange membrane fuel cell depends on the membrane electrode assembly (MEA) polarization. The characteristics of a home-made MEA with various polarizations were measured to calculate the internal losses, activation polarization, ohmic polarization, and mass transfer polarization. The results show that the activation polarization has a large effect, especially at low temperatures, while the ohmic polarization has little effect with a maximum difference of about 0.09 V for a current density of 1550 mA/cm². The mass transfer polarization effect increases rapidly as the current density increases. Moreover, 40%-44% of the oxygen transport resistance comes from the molecular diffusion resistance in the gas diffusion layer with 43%-50% of the resistance originating from the oxygen dissolution and diffusion through the ionomer layer.

导出引用

赵阳, 王树博, 李微微, 谢晓峰. 质子交换膜燃料电池电压损耗[J]. 清华大学学报（自然科学版）. 2020, 60(3): 254-262 https://doi.org/10.16511/j.cnki.qhdxxb.2019.26.019

ZHAO Yang, WANG Shubo, LI Weiwei, XIE Xiaofeng. Polarization of the membrane electrode assembly in a proton exchange membrane fuel cell[J]. Journal of Tsinghua University(Science and Technology). 2020, 60(3): 254-262 https://doi.org/10.16511/j.cnki.qhdxxb.2019.26.019

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基金

国家重点研发计划项目（2017YFB0103003，2017YFB0103003）

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收稿日期	出版日期
2019-03-13	2020-03-15
发布日期
2020-03-03

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