Above and beyond the Lab Scale─Creating a kW-Sized AEM Electrolyzer Validated by In-Situ Distribution of Relaxation Times

IF 5.3 3区工程技术 Q2 ENERGY & FUELS

Energy & Fuels Pub Date : 2025-09-30 DOI:10.1021/acs.energyfuels.5c03702

Suhas Nuggehalli Sampathkumar*, , , Thomas Benjamin Ferriday, , , Zoé Mury, , , Philippe Aubin, , , Khaled Lawand, , and , Jan Van Herle,

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Abstract

Most reported anion exchange membrane water electrolyzers (AEMWEs) are currently limited to the usual 1–10 cm² electrodes in single-cell AEMWEs; however, accelerating its technology readiness level necessitates an explosive increment in unit sizes. We report the design, characterization, and validation of a 1 kW, 500 cm² (5 × 100 cm²) non-PGM AEMWE stack. Complete with corrosion protection, internal heating, and a control system, the patented stack design operated stably at 1.0 A cm^–2 with an energy efficiency of 53.2 kWh kg_H₂^–1. Moreover, to confirm cell-to-cell uniformity, a comprehensive statistical analysis was carried out to reveal five uniformly performing cells. Impedance analysis complemented by distribution of relaxation times (DRT) analysis revealed kinetic insights similar to those traditionally obtained for lab-scale electrodes, proving both non-PGM electrode scalability and efficacy, and the utility of DRT analysis on large-scale AEMWE stacks.

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超越实验室规模——创建kw级AEM电解槽，并通过现场弛豫时间分布进行验证

大多数报道的阴离子交换膜水电解槽（AEMWEs）目前仅限于通常的1-10 cm2的单电池AEMWEs电极；然而，加速其技术准备水平需要单位规模的爆炸性增长。我们报告了1 kW， 500 cm2 （5 × 100 cm2）非pgm AEMWE堆栈的设计，表征和验证。该专利烟囱具有防腐、内部加热和控制系统，在1.0 a cm-2的电压下稳定运行，能效为53.2 kWh kgH2-1。此外，为了确认细胞间的均匀性，进行了全面的统计分析，以显示五个表现均匀的细胞。阻抗分析与松弛时间分布（DRT）分析相结合，揭示了与传统的实验室规模电极相似的动力学见解，证明了非pgm电极的可扩展性和有效性，以及DRT分析在大规模AEMWE堆上的实用性。

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来源期刊

Energy & Fuels 工程技术-工程：化工

CiteScore

9.20

自引率

13.20%

发文量

1101

审稿时长

2.1 months

期刊介绍： Energy & Fuels publishes reports of research in the technical area defined by the intersection of the disciplines of chemistry and chemical engineering and the application domain of non-nuclear energy and fuels. This includes research directed at the formation of, exploration for, and production of fossil fuels and biomass; the properties and structure or molecular composition of both raw fuels and refined products; the chemistry involved in the processing and utilization of fuels; fuel cells and their applications; and the analytical and instrumental techniques used in investigations of the foregoing areas.