Properties of NbC/а-C:H films on titanium bipolar plates for proton exchange membrane fuel cells

IF 2.6 4区工程技术 Q3 ELECTROCHEMISTRY Fuel Cells Pub Date : 2022-12-04 DOI:10.1002/fuce.202200049

Yong Gou Dr, Guang Jiang Dr, Jiangtao Geng Dr, Zhigang Shao Dr

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引用次数: 1

Abstract

Surface modification of metallic bipolar plates is a crucial subject for the performance elevation of proton exchange membrane fuel cells (PEMFCs). In this work, a series of NbC/а-C:H films with different Nb/C ratios are prepared by arc ion plating. Film microstructure, composition, mechanical properties, hydrophobility, interfacial contact resistance (ICR), and corrosion resistance in the simulated cathode environment of PEMFCs are systematically studied. The results show that within the experiment conditions, higher NbC content helps to promote the film hardness and adhesion strength as well as the interfacial conductivity. While higher а-C:H content attributes to a more compact microstructure thus improving the anti-corrosion performance. The best corrosion resistance and conductivity come with the lowest corrosion current density of 0.09 µA/cm² and ICR of 0.77 mΩ cm², respectively. Based on the result of this research, to further improve the comprehensive performance of NbC/а-C:H film, strategies for increasing the metal carbide content and preventing surface metal oxidation while keeping a dense and fine microstructure need to be considered.

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质子交换膜燃料电池用钛双极板上NbC/ fe‐C:H膜的性能

金属双极板的表面改性是提高质子交换膜燃料电池（PEMFC）性能的关键课题。在本工作中，通过电弧离子镀制备了一系列具有不同Nb/C比的NbC/а‐C:H薄膜。系统地研究了PEMFC膜的微观结构、组成、力学性能、疏水性、界面接触电阻（ICR）和在模拟阴极环境中的耐腐蚀性。结果表明，在实验条件下，较高的NbC含量有助于提高薄膜的硬度和粘合强度以及界面电导率。而а‐C:H含量越高，微观结构越紧凑，从而提高了抗腐蚀性能。最佳的耐腐蚀性和导电性分别为0.09µA/cm2和0.77 mΩcm2的最低腐蚀电流密度。基于这项研究的结果，为了进一步提高NbC/а‐C:H薄膜的综合性能，需要考虑在保持致密精细微观结构的同时增加金属碳化物含量和防止表面金属氧化的策略。

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来源期刊

Fuel Cells 工程技术-电化学

CiteScore

5.80

自引率

3.60%

发文量

审稿时长

3.7 months

期刊介绍： This journal is only available online from 2011 onwards. Fuel Cells — From Fundamentals to Systems publishes on all aspects of fuel cells, ranging from their molecular basis to their applications in systems such as power plants, road vehicles and power sources in portables. Fuel Cells is a platform for scientific exchange in a diverse interdisciplinary field. All related work in -chemistry- materials science- physics- chemical engineering- electrical engineering- mechanical engineering- is included. Fuel Cells—From Fundamentals to Systems has an International Editorial Board and Editorial Advisory Board, with each Editor being a renowned expert representing a key discipline in the field from either a distinguished academic institution or one of the globally leading companies. Fuel Cells—From Fundamentals to Systems is designed to meet the needs of scientists and engineers who are actively working in the field. Until now, information on materials, stack technology and system approaches has been dispersed over a number of traditional scientific journals dedicated to classical disciplines such as electrochemistry, materials science or power technology. Fuel Cells—From Fundamentals to Systems concentrates on the publication of peer-reviewed original research papers and reviews.