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<p>Maximizing evaporation performance is crucial for advancing interfacial steam generation (ISG) systems, yet the potential of Joule heating for this remains underexplored. Here, we present a high-performance interfacial evaporator that leverages Joule heating-based evaporation to achieve very high water evaporation rates. The system integrates thiol-functionalized glassy carbon sponge with ultra-low electrical&#xa0;resistance ( ~ 0.75 Ω) to maximize joule heating. Under 1 sun illumination and a 37 W power&#xa0;input, the evaporator achieves an evaporation rate of ~205 kg m⁻²h⁻¹, reaching surface temperatures of 97 °C at the air–water interface. With 3.5 wt% saltwater, joule heating alone produces 11.86 kg m⁻²h⁻¹&#xa0;, and combined solar (1sun)-electrothermal heating increases this to ~18 kg m⁻²h⁻¹. This work showcases the role of high electrical power in&#xa0;interfacial evaporation, offering a pathway for rapid&#xa0;and high-performance steam generation.</p>

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Engineering electrothermally enhanced interfacial evaporation for high-performance solar desalination

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年9月26日

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  • Higgins Marangattil Wilson,
  • Tushar Prashant Pandit,
  • Shakeelur Raheman A.R,
  • Arun kumar Thirugnanasambantham,
  • Hyeong Woo Lim,
  • Sang Joon Lee

摘要

Maximizing evaporation performance is crucial for advancing interfacial steam generation (ISG) systems, yet the potential of Joule heating for this remains underexplored. Here, we present a high-performance interfacial evaporator that leverages Joule heating-based evaporation to achieve very high water evaporation rates. The system integrates thiol-functionalized glassy carbon sponge with ultra-low electrical resistance ( ~ 0.75 Ω) to maximize joule heating. Under 1 sun illumination and a 37 W power input, the evaporator achieves an evaporation rate of ~205 kg m⁻²h⁻¹, reaching surface temperatures of 97 °C at the air–water interface. With 3.5 wt% saltwater, joule heating alone produces 11.86 kg m⁻²h⁻¹ , and combined solar (1sun)-electrothermal heating increases this to ~18 kg m⁻²h⁻¹. This work showcases the role of high electrical power in interfacial evaporation, offering a pathway for rapid and high-performance steam generation.