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订购的膜电极组装具有大幅增强的质子和质量运输,用于质子交换膜水电解

Bin Tian^1,2, Yali Li¹, Yiyang Liu³

¹Division of Advanced Nanomaterials, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123, China.

|July 10, 2023

概括

具有有序结构的工程膜电极组件 (MEAs) 显著降低了负荷,并提高了质子交换膜水电解的性能,提供了具有成本效益和可扩展的解决方案.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.

背景情况:

质子交换膜水电解 (PEMWE) 需要高效的膜电极组件 (MEAs).
减少MEA中的 (Ir) 负载对于成本效益至关重要.
传统的MEA面临的挑战是接口结合,质子运输和气泡管理.

研究的目的:

设计一个订购的MEA,以提高性能和减少Ir负载.
调查结构设计对MEA效率和耐久性的影响.
开发一种可扩展的方法,用于生产用于PEM水电解的先进MEAs.

主要方法:

使用阳极氧化模板和磁铁喷射制造订购的MEA.
设计一个具有梯度Nafion分布的圆Nafion阵列.
实现紧密结合的催化层/质子交换膜 (CL/PEM) 接口.

主要成果:

订购的MEA实现了20.0μg cm-2的超低IR负荷.
与传统的MEA相比,电化学活性区域增加了8.7倍 (1.0 mg cm-2 Ir负载).
在2.0V下达到168,000 mA mg_Ir^-1 cm^-2的质量活动,超过了大多数报告的PEM电解剂.

结论:

工程订购的MEA表现出卓越的性能和耐用性.
该设计促进了高效的质子转移和快速释放氧气泡.
这项工作为设计用于PEM水电解的先进MEAs提供了一种简单,经济有效和可扩展的途径.

关键词:

纳菲安阵列是一个Nafion阵列.订购了MEA的订单.在PEM中,水分是水分.质子和质量运输.超低IR负载超低IR负载

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