固体氧化物燃料电池镍基阳极抗积碳性能的研究进展

The research progress on anti-coking performance of nickel-based anodes in solid oxide fuel cells

  • 摘要: 固体氧化物燃料电池(SOFCs)是一种快速兴起的低碳能源技术,具有高效率、能够使用含碳燃料以及与碳捕获和储存兼容的特点。然而,目前最常用的高效镍基阳极材料在直接碳氢燃料中容易发生积碳导致失活,极大地限制了其商业化应用。尽管目前已经广泛开展了关于寻找新的可替代阳极材料,然而,催化活性较低和电池制备工艺复杂等新问题同样亟待解决和突破。综合考虑到镍基阳极材料优越的催化活性和成熟的技术,因此,聚焦于解决其表面积碳问题以提升电池运行稳定性仍然具有重要意义和前景。本综述梳理了在碳氢燃料气氛下催化剂表面积碳的形成机制,阐明了操作条件和催化剂性质对碳沉积现象的具体影响。在此基础上,重点总结了多种催化剂的改性策略,以期为缓解碳沉积问题提供有效方法和可靠途径。最后,对当前研究中存在的问题进行了总结,并对未来的研究方向进行了展望,旨在为未来设计在碳氢化燃料气氛下具有强抗积碳能力的SOFCs阳极提供材料和理论基础,以推动SOFC技术的进一步发展和商业化应用。

     

    Abstract: Solid oxide fuel cells (SOFCs) are a rapidly emerging low-carbon energy technology, characterized by high efficiency, the ability to utilize carbon-containing fuels, and compatibility with carbon capture and storage (CCS). However, the most used efficient nickel-based anode materials are prone to coking and deactivation when fueled with hydrocarbon fuels, which severely limits their commercial application. Although extensive research has been conducted to identify new alternative anode materials, new challenges such as low catalytic activity and complex fabrication processes of the fuel cells also need to be urgently addressed and overcome. Considering the excellent catalytic activity and mature technology of nickel-based anode materials, focusing on solving their surface coking problem to enhance the operational stability of the cells remains highly significant and promising. In this study, we investigated the coking mechanism on the catalyst surface under hydrocarbon fuel atmospheres and clarified the specific impacts of operating conditions and catalyst properties on carbon deposition. Based on this, we summarized various catalyst modification strategies to provide effective methods and reliable approaches to mitigate carbon deposition. Finally, we reviewed the current research issues and proposed future research directions, aiming to provide the material and theoretical basis for designing SOFC anodes with strong anti-coking capabilities in hydrocarbon fuel atmospheres, thereby promoting the further development and commercial application of SOFC technology.

     

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