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AluminiumAluminium is a promising material as an alternative green energy storage solution thanks to its very high volumetric energy density (23.5 kWh/L) and full recyclability. CO2-free aluminiumAluminium could be produced from renewable energy sources through an electrolytic process by using vertical inert anodesInert anode and wetted drained cathodes as a sustainable substitute to the Hall-Héroult process which utilises horizontal carbon anodesCarbon anode and cathodes. To date, a viable non-consumable anodeAnode has yet to be implemented in industryIndustry. Ni–Fe–Cu alloys have emerged as a strong candidate for inert anodesInert anode due to their favourable properties. Our work aims to undertake a systematic investigation of the anodeAnode properties (corrosion resistanceCorrosion resistance, cell stability, purity of the resultant aluminiumAluminium) as a function of the alloy composition, to determine an optimal composition range for the inert anodeInert anode and resultant vertical electrolysis cell performance. The effect of the Ni:Fe ratio on the microstructureMicrostructure and cell performance is considered and the methodology with respect to the alloy developmentAlloy development is outlined. Electrolysis tests, oxidationOxidation studies, and microstructureMicrostructure investigations were conducted at the laboratory scale to then guide the up-scaling process.

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On the Alloy Development of Ni–Fe–Cu Inert Anodes for Sustainable, CO2-Free Aluminium Electrolysis

  • 会议论文

  • 发表日期：

    2025年

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  • Thomas Jamieson,
  • Peer Decker,
  • Andrei Yasinskiy,
  • Roman Düssel,
  • Gudmundur Gunnarsson,
  • Jon Magnusson,
  • Bastian Adam,
  • Ralf Busch,
  • Isabella Gallino

摘要

AluminiumAluminium is a promising material as an alternative green energy storage solution thanks to its very high volumetric energy density (23.5 kWh/L) and full recyclability. CO2-free aluminiumAluminium could be produced from renewable energy sources through an electrolytic process by using vertical inert anodesInert anode and wetted drained cathodes as a sustainable substitute to the Hall-Héroult process which utilises horizontal carbon anodesCarbon anode and cathodes. To date, a viable non-consumable anodeAnode has yet to be implemented in industryIndustry. Ni–Fe–Cu alloys have emerged as a strong candidate for inert anodesInert anode due to their favourable properties. Our work aims to undertake a systematic investigation of the anodeAnode properties (corrosion resistanceCorrosion resistance, cell stability, purity of the resultant aluminiumAluminium) as a function of the alloy composition, to determine an optimal composition range for the inert anodeInert anode and resultant vertical electrolysis cell performance. The effect of the Ni:Fe ratio on the microstructureMicrostructure and cell performance is considered and the methodology with respect to the alloy developmentAlloy development is outlined. Electrolysis tests, oxidationOxidation studies, and microstructureMicrostructure investigations were conducted at the laboratory scale to then guide the up-scaling process.