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The impact of degradation on the economics of green hydrogen

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Listed:
  • Park, Joungho
  • Kang, Sungho
  • Kim, Sunwoo
  • Kim, Hana
  • Cho, Hyun-Seok
  • Lee, Changsoo
  • Kim, MinJoong
  • Lee, Jay H.

Abstract

The production of green hydrogen through renewable energy is increasingly recognized as a viable alternative to fossil fuels in efforts towards global decarbonization. Alkaline water electrolysis, notable for its long operational history and scalability, is a pivotal technology in the mass production of green hydrogen. However, the variability of renewable energy sources presents significant challenges, particularly the frequent on/off operations that accelerate degradation of the electrolysis stack. This study assesses how degradation caused by the instability of renewable energy sources impacts the economic feasibility and productivity of alkaline water electrolysis under. A comprehensive model is developed to forecast efficiency declines in hydrogen production due to degradation and to evaluate renewable energy outputs using meteorological data. Economic viability is analyzed through various scenarios using the levelized cost of hydrogen. Initial results reveal substantial economic and productivity losses when degradation is considered, compared to non-degradation scenarios. The integration of multiple types of renewable sources reduces variability and thus mitigates degradation to some extent. While battery integration stabilizes renewable energy, economic challenges persist due to high costs despite reduced on/off cycles. The study also explores the trade-offs between economic factors and the frequency of stack replacements, generating optimal replacement schedules across different efficiency settings. The sensitivity analysis underscores the significant influence of degradation on productivity and economic outcomes, as well as the uncertainties related to cost and meteorological data.

Suggested Citation

  • Park, Joungho & Kang, Sungho & Kim, Sunwoo & Kim, Hana & Cho, Hyun-Seok & Lee, Changsoo & Kim, MinJoong & Lee, Jay H., 2025. "The impact of degradation on the economics of green hydrogen," Renewable and Sustainable Energy Reviews, Elsevier, vol. 213(C).
  • Handle: RePEc:eee:rensus:v:213:y:2025:i:c:s1364032125001455
    DOI: 10.1016/j.rser.2025.115472
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    References listed on IDEAS

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    1. Park, Joungho & Hwan Ryu, Kyung & Kim, Chang-Hee & Chul Cho, Won & Kim, MinJoong & Hun Lee, Jae & Cho, Hyun-Seok & Lee, Jay H., 2023. "Green hydrogen to tackle the power curtailment: Meteorological data-based capacity factor and techno-economic analysis," Applied Energy, Elsevier, vol. 340(C).
    2. Zhang, Tao & Song, Lingjun & Yang, Fuyuan & Ouyang, Minggao, 2024. "Research on oxygen purity based on industrial scale alkaline water electrolysis system with 50Nm3 H2/h," Applied Energy, Elsevier, vol. 360(C).
    3. Yu, Bolin & Fang, Debin & Xiao, Kun & Pan, Yuling, 2023. "Drivers of renewable energy penetration and its role in power sector's deep decarbonization towards carbon peak," Renewable and Sustainable Energy Reviews, Elsevier, vol. 178(C).
    4. Götz, Manuel & Lefebvre, Jonathan & Mörs, Friedemann & McDaniel Koch, Amy & Graf, Frank & Bajohr, Siegfried & Reimert, Rainer & Kolb, Thomas, 2016. "Renewable Power-to-Gas: A technological and economic review," Renewable Energy, Elsevier, vol. 85(C), pages 1371-1390.
    5. Tian, Xuelin & An, Chunjiang & Chen, Zhikun, 2023. "The role of clean energy in achieving decarbonization of electricity generation, transportation, and heating sectors by 2050: A meta-analysis review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 182(C).
    6. Park, Joungho & Kang, Sungho & Kim, Sunwoo & Kim, Hana & Kim, Sang-Kyung & Lee, Jay H., 2024. "Optimizing green hydrogen systems: Balancing economic viability and reliability in the face of supply-demand volatility," Applied Energy, Elsevier, vol. 368(C).
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