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Renewable intermittent energy sources like solar and wind power are important for decarbonizing the energy sector and energy storageEnergy storage will become necessary for balancing production and demand and can also be important for load levelling purposes. Such energy storageEnergy storage should be cheap and made from readily available materials. A suggested battery technology is the all-liquid molten saltMolten salt Na-Zn battery, which is operated at 600 °C. The battery produces liquid sodiumLiquid sodium during charging. Sodium will float to the top of the electrolyte. Ceramic and glass materials which act as insulating and sealing materials tend to corrode/disintegrate in contact with liquid and/or gaseous sodiumGaseous sodium. Therefore, in this study, different ceramic and glass materials were exposed to gaseous and liquid sodiumLiquid sodium to determine their resistance to sodium integration leading to materials degradation. The samples were investigated by micro-X-ray computed tomography (µ-CT) before and after exposure. This study found that glass ceramics showed low resistance to sodium exposure, while materials such as Al2O3Al2O3 and AlN showedMicro X-ray computed tomography good resistance to sodium exposure.

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Sodium Resistance of Ceramic and Glass Materials—Na Thermo-gravimetric Analysis and Liquid Na Exposure Test

  • 会议论文

  • 发表日期：

    2025年

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  • Ole S. Kjos,
  • Zhaohui Wang,
  • Kent-Robert Molvik,
  • Stein Rørvik,
  • Cathrine K. W. Solem,
  • Camilla Sommerseth

摘要

Renewable intermittent energy sources like solar and wind power are important for decarbonizing the energy sector and energy storageEnergy storage will become necessary for balancing production and demand and can also be important for load levelling purposes. Such energy storageEnergy storage should be cheap and made from readily available materials. A suggested battery technology is the all-liquid molten saltMolten salt Na-Zn battery, which is operated at 600 °C. The battery produces liquid sodiumLiquid sodium during charging. Sodium will float to the top of the electrolyte. Ceramic and glass materials which act as insulating and sealing materials tend to corrode/disintegrate in contact with liquid and/or gaseous sodiumGaseous sodium. Therefore, in this study, different ceramic and glass materials were exposed to gaseous and liquid sodiumLiquid sodium to determine their resistance to sodium integration leading to materials degradation. The samples were investigated by micro-X-ray computed tomography (µ-CT) before and after exposure. This study found that glass ceramics showed low resistance to sodium exposure, while materials such as Al2O3Al2O3 and AlN showedMicro X-ray computed tomography good resistance to sodium exposure.