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The rapid growth of industry and expansion of structures contribute to global warming by releasing waste heat, which intensifies the greenhouse effect and accelerates climate change. Converting waste heat into usable energy can help mitigate these impacts. This study explores using seawater enhanced with graphene, for energy harvesting in thermoelectrochemical cells. Traditional ionic liquids used in these cells are costly, limiting their use. The research investigates the thermal-to-electric conversion of seawater with added graphene nanoplatelets to improve its ionic and electrical conductivity. The Seebeck coefficient and power generation were measured with seawater molarity ranging from 0.001 to 1.0 M, mixed with graphene nanoplatelets from 0.001 to 5 wt%. Pure seawater achieved a peak Seebeck coefficient of − 1.795 mV/K and a power density of 7.75 μW/m2. Adding 0.001 wt% graphene increased the power density to 83.2 μW/m2, though the Seebeck coefficient decreased to − 0.44 mV/K. The study highlights that graphene can significantly enhance the thermoelectrochemical properties of seawater towards green energy harvesting from thermal.

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Investigation of Aqueous Sea Salt Thermoelectrochemical Power Generation Using Graphene Nanoplatelet Additive

  • 会议论文

  • 发表日期：

    2025年

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  • Muhammad Irsyad Iskandar Mohamed Idris,
  • Nur Fadzilah Basri,
  • Suhana Mohd Said,
  • Mohd Faizul Mohd Sabri,
  • Megat Muhammad Ikhsan Megat Hasnan

摘要

The rapid growth of industry and expansion of structures contribute to global warming by releasing waste heat, which intensifies the greenhouse effect and accelerates climate change. Converting waste heat into usable energy can help mitigate these impacts. This study explores using seawater enhanced with graphene, for energy harvesting in thermoelectrochemical cells. Traditional ionic liquids used in these cells are costly, limiting their use. The research investigates the thermal-to-electric conversion of seawater with added graphene nanoplatelets to improve its ionic and electrical conductivity. The Seebeck coefficient and power generation were measured with seawater molarity ranging from 0.001 to 1.0 M, mixed with graphene nanoplatelets from 0.001 to 5 wt%. Pure seawater achieved a peak Seebeck coefficient of − 1.795 mV/K and a power density of 7.75 μW/m2. Adding 0.001 wt% graphene increased the power density to 83.2 μW/m2, though the Seebeck coefficient decreased to − 0.44 mV/K. The study highlights that graphene can significantly enhance the thermoelectrochemical properties of seawater towards green energy harvesting from thermal.