Challenges in Electrolyzer Performance Evaluation for Green Hydrogen Production

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2024-06-20 DOI:10.1021/acsmaterialslett.4c00690

Seok-Jin Kim, Javeed Mahmood, Phil Woong Kang, Zhonghua Xue and Cafer T. Yavuz*,

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Abstract

The transition to sustainable energy increasingly relies on hydrogen gas produced by water electrolysis. Current performance metrics for electrolyzers, typically measured in megawatts or kilowatts, inadequately capture the full scope of the system efficiency and hydrogen output rates. The gap between academic and industrial evaluations can distort the perceived effectiveness of these technologies. This Perspective proposes a refined dual-metric evaluation system that integrates both energy efficiency (kWh/kg H₂) and production rate (Nm³/h) to provide a balanced view of performance. A standardized framework similar to that for photovoltaic technologies is suggested to enable transparent comparisons and support advancements in electrolyzer design. Emphasizing the need for consistent testing conditions, the framework aims to ensure that the evaluations of the electrodes, stacks, and overall systems remain reliable across various operational scenarios. Adopting such a comprehensive evaluation approach is essential for accurately communicating the capabilities of water electrolyzers and propelling the widespread use of green hydrogen.

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绿色制氢电解槽性能评估面临的挑战

向可持续能源的过渡越来越依赖于水电解产生的氢气。目前电解槽的性能指标通常以兆瓦或千瓦为单位，不足以全面反映系统效率和氢气产出率。学术评估与工业评估之间的差距会扭曲这些技术的预期效果。本视角提出了一套完善的双指标评估系统，该系统综合了能效（千瓦时/千克氢气）和产出率（Nm3/h），以提供一个平衡的性能视角。建议采用与光伏技术类似的标准化框架，以便进行透明的比较，支持电解槽设计的进步。该框架强调需要一致的测试条件，旨在确保电极、堆栈和整体系统的评估在各种运行情况下都能保持可靠。采用这种全面的评估方法对于准确宣传水电解槽的能力和推动绿色氢气的广泛使用至关重要。

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.