Current Bunching Effect of Large-Scale Alkaline Hydrogen Evolution Article Swipe

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Wei Wei , Yanghong Xia , Haoran Cheng , Liming Li , Zhiyuan Hu , Yaolong Bo ·

YOU? · · 2023 · Open Access · · DOI: https://doi.org/10.21203/rs.3.rs-3417623/v1

Alkaline water electrolysers (AWEs) are suitable for the industrial hydrogen production driven by renewable energy sources. However, the understanding about the operating principle of large-scale AWEs is not profound and enough. Here, we report the current bunching effect and its related phenomena for large-scale AWEs, namely low-load inefficiency and anomalous efficiency-temperature relationship. It is generally thought that the electrolysis or ionic current is distributed uniformly on the surface of bipolar plates in AWEs, but in fact, the current is not consistent and locates within narrow areas especially for low-load states. Through the detailed electric field calculation, the mechanism of current bunching effect is revealed. It is pointed out that the physical structures and electrical characteristics instead of the chemical properties of AWEs are strongly related to the current bunching effect. Based on the found current bunching effect, the inefficiency and anomalous efficiency-temperature relationship of low-load AWEs can be explained effectively. This work sheds new light on and provides inspiration for the further development of the industrial hydrogen production from fluctuating renewable energy sources based on low-cost AWEs.

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Environmental Science

Materials Science

Chemistry

Physics

Electrical Engineering

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Inefficiency Current (fluid) Renewable energy Electrolysis Hydrogen production Scale (ratio) Work (physics) Electric field Electric current Hydrogen Environmental science Materials science Chemical physics Chemistry Physics Thermodynamics Electrical engineering Economics Engineering Electrolyte Physical chemistry Electrode Organic chemistry Microeconomics Quantum mechanics

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Type: preprint
Language: en
Landing Page: https://doi.org/10.21203/rs.3.rs-3417623/v1
PDF: https://www.researchsquare.com/article/rs-3417623/latest.pdf
OA Status: green
References: 43
Related Works: 10
OpenAlex ID: https://openalex.org/W4388036432

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DOI: https://doi.org/10.21203/rs.3.rs-3417623/v1

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Title: Current Bunching Effect of Large-Scale Alkaline Hydrogen Evolution

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Type: preprint

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Language: en

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Publication year: 2023

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Publication date: 2023-11-01

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Authors: Wei Wei, Yanghong Xia, Haoran Cheng, Liming Li, Zhiyuan Hu, Yaolong Bo

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Landing page: https://doi.org/10.21203/rs.3.rs-3417623/v1

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Concepts: Inefficiency, Current (fluid), Renewable energy, Electrolysis, Hydrogen production, Scale (ratio), Work (physics), Electric field, Electric current, Hydrogen, Environmental science, Materials science, Chemical physics, Chemistry, Physics, Thermodynamics, Electrical engineering, Economics, Engineering, Electrolyte, Physical chemistry, Electrode, Organic chemistry, Microeconomics, Quantum mechanics

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