近日，重庆大学丁炜团队研究了阴离子交换膜燃料电池阳极自排水气液解耦输运。相关论文发表在2025年9月25日出版的《美国化学会志》上。

气液去耦传输是阴离子交换膜燃料电池（AEMFCs）阳极催化层的一个基本挑战，其中水表现出矛盾的二元性：作为氢氧根离子（OH^-）的基本传输介质，以及作为需要立即排出的动力学限制产物。

研究组报告了一种仿生毛细管驱动的水管理策略，通过设计分层多孔碳纳米纤维层（CNL）作为自排水阳极催化层（SD-ACL）来实现气液解耦传输。SD-ACL通过结构解耦的途径实现各向异性的质量传输：通过疏水孔隙网络促进快速的平面气体传输，同时通过毛细作用驱动平面内自发的水排放。结果表明，SD-ACL制备的膜电极组件（MEA）在高湿条件下的峰值功率密度高达1150.3 mW cm^-2，具有优异的耐久性，是传统电极组件的2.3倍。此外，SD-ACL可使非贵金属金属阳极AEMFC增强57.5%，为实现高性能无铂族金属（PGM-free） AEMFC技术提供了有前景的策略。

附：英文原文

Title: Gas–Liquid Decoupling Transport by Self-Draining in the Anode of Anion Exchange Membrane Fuel Cells

Author: Guangyao Zhao, Zebi Chen, Xiaoyun Song, Qimei Yang, Jian Wang, Wei Ding, Zidong Wei

Issue&Volume: September 25, 2025

Abstract: The gas–liquid decoupling transport represents a fundamental challenge in anode catalytic layers of anion exchange membrane fuel cells (AEMFCs), where water exhibits a paradoxical duality: as an essential transport medium for hydroxide ions (OH–), yet as a kinetic-limiting product requiring immediate expulsion. Herein, we report a biomimetic capillary-driven water management strategy to achieve gas–liquid decoupling transport by engineering a hierarchically porous carbon nanofiber layer (CNL) as a self-draining anode catalytic layer (SD-ACL). The SD-ACL achieves anisotropic mass transport through structurally decoupled pathways: promoting rapid through-plane gas transport with a hydrophobic porous network while driving spontaneous in-plane water drainage via capillary action. As a result, the SD-ACL-fabricated membrane electrode assemble (MEA) achieved a high peak power density of 1150.3 mW cm–2 at high humidity with excellent durability, which was 2.3 times higher than that of the traditional one. Moreover, the SD-ACL could enhance nonprecious metal-anode-based AEMFCs by 57.5%, offering a promising strategy to achieve high-performance platinum-group metal-free (PGM-free) AEMFC technology.

DOI: 10.1021/jacs.5c11489

Source: https://pubs.acs.org/doi/abs/10.1021/jacs.5c11489