Development of Double-Side Ordered Membrane Electrode Assembly Based on Titanium Nitride Nanoarrays

Industrial Chemistry & Materials Pub Date : 2024-03-21 DOI:10.1039/d4im00008k

Lingfeng Xuan, Deqing Mei, Caiying Zhou, Wenze Mao, Yancheng Wang

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Abstract

The membrane electrode assembly (MEA) plays a crucial role in the functionality of proton exchange membrane fuel cells (PEMFCs). The channels present within the catalyst layer of MEAs exhibit a disordered configuration, which consequently give rise to low efficiency in mass transportation. This paper presents a novel double-side ordered MEA to improve its both mass transport performance and durability. Using seed-assisted hydrothermal reaction and nitriding treatment, TiN nanorods array was synthesized on ITO surface and the catalyst was uniformly coated onto the TiN support by ultrasonic spraying. After that the double-side ordered MEA was fabricated employing a transfer printing process. The electrochemical testing was conducted to evaluate the MEA’s performance, and results showed that the double-side ordered MEA can generate a peak power of 678.30 mW/cm2 with platinum loading of 0.2 mg/cm2. After chemical accelerated stress test operation, the peak performance degradation was 5%. These results provide substantial evidence for the effectiveness of our developed double-side ordered MEA can mitigate catalyst polarization corrosion. Thus, this study reveals the immense potential of the TiN nanorod array-based double-side ordered MEA could advance the development of efficient and stable MEAs.

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开发基于氮化钛纳米阵列的双面有序膜电极组件

膜电极组件（MEA）在质子交换膜燃料电池（PEMFC）的功能中起着至关重要的作用。质子交换膜燃料电池催化剂层内的通道呈现出无序配置，因此在大规模运输中效率较低。本文介绍了一种新型双面有序 MEA，以改善其质量传输性能和耐用性。利用种子辅助水热反应和氮化处理，在 ITO 表面合成了 TiN 纳米棒阵列，并通过超声喷涂将催化剂均匀涂覆在 TiN 支承上。然后采用转移印刷工艺制作了双面有序 MEA。电化学测试评估了 MEA 的性能，结果表明，在铂负载为 0.2 mg/cm2 的情况下，双面有序 MEA 可产生 678.30 mW/cm2 的峰值功率。经过化学加速应力测试操作后，峰值性能衰减为 5%。这些结果充分证明了我们开发的双面有序 MEA 能够有效缓解催化剂极化腐蚀。因此，这项研究揭示了基于 TiN 纳米棒阵列的双面有序 MEA 的巨大潜力，可推动高效、稳定 MEA 的发展。

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Industrial Chemistry & Materials chemistry, chemical engineering, functional materials, energy, etc.-

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