吴新宇,刘瑞良,武昭杰.表面热扩渗技术在金属双极板表面改性中的研究进展[J].表面技术,2024,53(18):1-15.
WU Xinyu,LIU Ruiliang,WU Zhaojie.Research Progress of Thermal Diffusion Technology in Surface Modification of Metallic Bipolar Plate[J].Surface Technology,2024,53(18):1-15 |
| 表面热扩渗技术在金属双极板表面改性中的研究进展 |
| Research Progress of Thermal Diffusion Technology in Surface Modification of Metallic Bipolar Plate |
| 投稿时间：2023-12-03 修订日期：2024-04-15 |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.18.001 |
| 中文关键词: 金属双极板 热扩渗 表面改性 耐蚀性 界面接触电阻 |
| 英文关键词:metallic bipolar plates thermal diffusion surface modification corrosion resistance interfacial contact resistance |
| 基金项目:国家自然科学基金(52371060);黑龙江省自然科学基金(LH2023E060) |
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| Author | Institution |
| WU Xinyu | Key Laboratory of Ultra-light Materials and Surface Technology of Ministry of Education, School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China |
| LIU Ruiliang | Key Laboratory of Ultra-light Materials and Surface Technology of Ministry of Education, School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China |
| WU Zhaojie | Key Laboratory of Ultra-light Materials and Surface Technology of Ministry of Education, School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China |
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| 中文摘要: |
| 燃料电池因其环保和资源利用率高等优点近年来备受关注，对改善全球环境具有重要意义。双极板是燃料电池的重要组成部分，目前燃料电池中大多数的双极板为石墨双极板，其厚度大、加工成本高、柔韧性较差，而金属双极板是替代石墨双极板的最佳材料，其易于加工、成本较低。目前对金属双极板表面制备涂层的研究最为广泛，然而大多数涂层方法工艺复杂，容易形成缺陷，且对燃料电池商业化来说过于昂贵，因此可以通过对金属双极板进行热扩渗改性以满足其服役性能。介绍了不同金属双极板的表面改性技术，列出了不同种类的热扩渗改性技术，重点概况了热扩渗工艺以及耐蚀、导电性能。分析结果表明，对于热扩渗工艺，在制备双极板时应选用合适的温度，以减小或消除形变对双极板的影响;制备出均匀、致密且组织单一的热扩渗层可以明显提高金属双极板的性能;在空气和模拟燃料电池溶液环境中形成的氧化膜和钝化膜同样对金属双极板的性能具有重要影响。在金属双极板表面进行热扩渗改性研究，以提高其耐蚀性、导电性及服役稳定性，同时开发出新型复合工艺，对推动金属双极板在燃料电池的应用至关重要。 |
| 英文摘要: |
| Fuel cells have attracted much attention in recent years due to their environmental protection and high resource utilization advantages, which are of great significance to improving the global environment. Bipolar plate is an important part of fuel cells, which isolates oxidants and reducing agents in fuel cells. Electrons generated by the anode have been collected and then conducted to the cathode. They have good electrical conductivity and thermal conductivity; requiring low contact resistance and high corrosion resistance. Therefore, the Department of Energy (DOE) has established relevant performance indicators, which stipulate that bipolar plates can only be used in proton exchange membrane fuel cells when they meet the standards. At present, most of the bipolar plates in fuel cells are graphite bipolar plates, which have large thickness, high processing cost and poor flexibility, while metal bipolar plates are the best material to replace graphite bipolar plates, which are easy to process and low in cost. But in the acidic environment in which fuel cells operate, metal bipolar plates are prone to corrosion, resulting in a reduction in the output efficiency of fuel cells, which seriously affects the application. At present, the preparation of coatings on the surface of metal bipolar plates is the most widely studied. However, most of the coating methods are too complex, easy to form defects, and are too expensive for the commercialization of fuel cells. Therefore, the method of thermal diffusion modification of metal bipolar plates can be used to meet their service performance. This paper introduced different kinds of metal bipolar plates and different surface modification techniques of metal bipolar plates. Different kinds of thermal expansion modification techniques were listed, with a focus on the thermal expansion process, corrosion resistance and conductivity. The analysis results show that for the thermal expansion process, appropriate temperature should be selected when preparing the bipolar plate to reduce or eliminate the influence of deformation on the bipolar plate. The preparation of a uniform, dense and single thermal expansion layer could significantly improve the performance of metal bipolar plates. The oxidation film and passivation film formed in the air and simulated fuel cell solution environment also played an important role in the performance of metal bipolar plates. |
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