Carbon Cloth with Graphene Films as Cathodic Microporous Layer in Air-Breathing Proton Exchange Membrane Fuel Cells (PEMFCs)

IF 0.8 4区 工程技术 Q4 CHEMISTRY, MULTIDISCIPLINARY
Zihao Chen, Zitong Huang, Liangliang Sun, Junbo Wang, Hailong Xiong, Haoyu Yang, Jinwen Yang
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Abstract

Enhancing the performance of PEMFCs significantly depends on the efficient diffusion of gases and the transport of water molecules. In this study, we utilized the high porosity and electrical conductivity of carbon fiber to promote the autonomous growth of lotus leaf graphene along the carbon fiber substrate. This innovation enables the creation of a gas cathode microporous layer for aspirated PEMFCs, which demonstrates high structural stability, minimal mass transfer resistance, and cost-effectiveness. Efficient gas diffusion and water transport are critical, as inadequate management of these factors can negatively impact battery lifespan and stability. The PEMFC cell with Gra/CC-60 exhibits a maximum current density of 1480 mA/cm2, outperforming other samples. Additionally, the peak power density reaches 398.9 mW/cm2 at 0.43 V. Remarkably, after 12 hours of operation at high current density, the PEMFC cell shows only a 7.94% drop in current density. This research paves the way for the development of microporous layers for fuel cells, sensors, and catalytic modules, while also introducing a novel approach to the selection and design of carbon materials.

Abstract Image

石墨烯膜碳布阴极微孔层在呼吸式质子交换膜燃料电池中的应用
提高pemfc的性能很大程度上取决于气体的有效扩散和水分子的传输。在这项研究中,我们利用碳纤维的高孔隙率和高导电性来促进荷叶石墨烯沿着碳纤维衬底自主生长。这一创新为吸气式pemfc创造了气体阴极微孔层,具有较高的结构稳定性、最小的传质阻力和成本效益。有效的气体扩散和水输送至关重要,因为对这些因素的管理不当会对电池的寿命和稳定性产生负面影响。含有Gra/CC-60的PEMFC电池显示出1480 mA/cm2的最大电流密度,优于其他样品。此外,在0.43 V时,峰值功率密度达到398.9 mW/cm2。值得注意的是,在高电流密度下工作12小时后,PEMFC电池的电流密度仅下降了7.94%。这项研究为燃料电池、传感器和催化模块的微孔层的发展铺平了道路,同时也为碳材料的选择和设计引入了一种新的方法。
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来源期刊
Solid Fuel Chemistry
Solid Fuel Chemistry CHEMISTRY, MULTIDISCIPLINARY-ENERGY & FUELS
CiteScore
1.10
自引率
28.60%
发文量
52
审稿时长
6-12 weeks
期刊介绍: The journal publishes theoretical and applied articles on the chemistry and physics of solid fuels and carbonaceous materials. It addresses the composition, structure, and properties of solid fuels. The aim of the published articles is to demonstrate how novel discoveries, developments, and theories may be used in improved analysis and design of new types of fuels, chemicals, and by-products. The journal is particularly concerned with technological aspects of various chemical conversion processes and includes papers related to geochemistry, petrology and systematization of fossil fuels, their beneficiation and preparation for processing, the processes themselves, and the ultimate recovery of the liquid or gaseous end products.
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