Mitigating the pathway competition between moisture and gas via hierarchical fibrous paper for humidity-adaptive fuel cells

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-03-28 DOI:10.1007/s12598-025-03271-5

Peng He, Lei Wang, Hao Tang, Quanbo Huang, Guodong Ren, Ruwei Chen, Xiaohui Wang

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Abstract

Proton exchange membrane fuel cell (PEMFC) is a promising clean energy source, but its performance and stability are vulnerable to the negative effects of humidity conditions. The gas diffusion substrate (GDS) plays a pivotal role in regulating the moisture and gas transport. The single pore structure of traditionally designed GDS often leads to the pathway competition between moisture and gas, which effects the efficiency of fuel cells. In this study, we report on a hierarchical fibrous paper with tunable hierarchical pores for a sustainable GDS. This design offers gas permeability under wet conditions, by separating the gas pathway from the moisture pathway, thus mitigating their pathway competition. In addition, this paper forms a multi-scale scaffold that absorbs moisture under high humidity conditions and releases it under dry conditions. It is allowed to maintain an optimal internal humidity and further enhances the humidity adaptability. Furthermore, the carbon footprint is only 15.97%, significantly lower than commercial alternatives. This feature makes it a sustainable solution to stabilize PEMFCs under diverse humidity conditions.

Graphical abstract

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通过用于湿度适应性燃料电池的分层纤维纸缓解湿气和气体之间的通路竞争

质子交换膜燃料电池（PEMFC）是一种很有前途的清洁能源，但其性能和稳定性容易受到湿度条件的负面影响。气体扩散基质（GDS）在调节水分和气体输送中起着关键作用。传统设计的GDS单孔结构往往导致水分和气体之间的通路竞争，从而影响燃料电池的效率。在这项研究中，我们报告了一种具有可调分层孔的分层纤维纸，用于可持续的GDS。这种设计通过将气体通道与水分通道分离，从而在潮湿条件下提供透气性，从而减轻了它们之间的通道竞争。此外，本文还形成了高湿条件下吸湿、干燥条件下释放的多尺度支架。它可以保持最佳的内部湿度，并进一步增强湿度适应性。此外，碳足迹仅为15.97%，显著低于商业替代品。这一特性使其成为在不同湿度条件下稳定pemfc的可持续解决方案。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.