质子交换膜燃料电池中TA1双极板的表面改性研究

doi:10.11902/1005.4537.2020.009

中国腐蚀与防护学报

2021, Vol. 41

Issue (1): 125-130 DOI: 10.11902/1005.4537.2020.009

研究报告

本期目录 | 过刊浏览

质子交换膜燃料电池中TA1双极板的表面改性研究

韩月桐, 张鹏超, 史杰夫, 李婷, 孙俊才(

)

大连海事大学材料工艺研究所大连 116026

Surface Modification of TA1 Bipolar Plate for Proton Exchange Membrane Fuel Cell

HAN Yuetong, ZHANG Pengchao, SHI Jiefu, LI Ting, SUN Juncai(

)

Institute of Materials Technology, Dalian Maritime University, Dalian 116026, China

全文: PDF(1300 KB) HTML

摘要:

针对TA1金属双极板，采用双辉光等离子方法制备出表面Zr改性层 (Zr-TA1)，研究了改性层的微观结构和性能。结果表明，Zr改性层厚度约为3 μm且表面平整致密。在模拟PEMFC阴/阳极环境下，Zr-TA1的自腐蚀电位明显升高，腐蚀电流密度降低了1~2个数量级。Zr改性层提高了TA1的疏水性能，其接触角由TA1双极板的71^o提高到Zr-TA1的94^o。经改性的双极板在140 N·cm^-2的装配压力下，接触电阻由117.3 mΩ·cm²降低到了15.5 mΩ·cm²，极大地提高了样品的表面导电性能。

关键词 ：质子交换膜燃料电池, Ti双极板, Zr改性层, 接触电阻, 耐腐蚀性能

Abstract：

The operation efficiency of proton exchange membrane fuel cell (PEMFC) is primarily affected by the electrical conductivity, corrosion resistance and hydrophobicity of the bipolar plate. Zr coating (Zr-TA1) is prepared by double glow plasma method on TA1 commercial pure Ti-bipolar plate. Then the microstructure and properties of the Zr coated TA1 Ti-plate are studied. It follows that, the thickness of Zr coating is about 3 μm and the coating surface is smooth and compact. Its potentiodynamic/potentiostatic polarization curves are measured in the cathodic and anodic environments of PEMFC, which shows that the corrosion potential of Zr-TA1 is increased significantly and the corrosion current density is decreased by 1~2 orders of magnitude in comparison with the bare TA1 Ti-plate. Furthermore, the hydrophobicity of TA1 is improved by Zr coating and the water contact angle is increased from 71^o (TA1) to 94^o (Zr-TA1). In addition, the contact resistance of Zr-TA1 (under the compaction pressure of 140 N·cm^-2) is decreased from 117.3 mΩ·cm² to 15.5 mΩ·cm², namely, the surface conductivity of the Ti-plate was significantly improved.

Key words： proton exchange membrane fuel cell Ti bipolar plate Zr coating interfacial contact resistance corrosion resistance

收稿日期: 2020-01-14

ZTFLH:

TG172

基金资助:国家重点研发计划(2016YFB0101206)

通讯作者: 孙俊才 E-mail: sunjc@dlmu.edu.cn

Corresponding author: SUN Juncai E-mail: sunjc@dlmu.edu.cn

作者简介: 韩月桐，男，1994年生，硕士生

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引用本文:

韩月桐, 张鹏超, 史杰夫, 李婷, 孙俊才. 质子交换膜燃料电池中TA1双极板的表面改性研究[J]. 中国腐蚀与防护学报, 2021, 41(1): 125-130.
Yuetong HAN, Pengchao ZHANG, Jiefu SHI, Ting LI, Juncai SUN. Surface Modification of TA1 Bipolar Plate for Proton Exchange Membrane Fuel Cell. Journal of Chinese Society for Corrosion and protection, 2021, 41(1): 125-130.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2020.009 或 https://www.jcscp.org/CN/Y2021/V41/I1/125

图1 Zr-TA1表面的XRD图

图2 Zr-TA1的表面形貌及Zr-TA1的横截面形貌及EDS分析

图3 Zr-TA1和未改性TA1双极板在模拟PEMFC阴极和阳极环境下的动电位极化曲线

表1 未改性TA1和Zr-TA1双极板在模拟PEMFC阴/阳极环境下的腐蚀参数

图4 Zr-TA1和未改性TA1双极板在模拟PEMFC阴极和阳极环境下的恒电位极化曲线

图5 未改性TA1和Zr-TA1双极板的水接触角图

图6 在不同模拟PEMFC环境中恒电位极化测试之前/后未改性TA1和Zr-TA1双极板的接触电阻

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