biostudies-literatureUnknown11(6)Kado YThe conversion of CO₂ into valuable carbon materials is essential for establishing a circular economy. This study syntheses hard carbon materials from CO₂ using high-temperature molten salt electrolysis and explores their use as anodes in sodium-ion batteries. CO₂ gases are absorbed as carbonate ions in molten salts and then electrochemically decomposed into solid carbon. When electrolysis was conducted at 600 °C in molten LiCl-KCl containing Li₂CO₃, the generated carbon was amorphous and nongraphitizable, as determined by XRD analysis and Raman spectroscopy. The obtained carbons before and after heat treatments at 900-1800 °C were employed as the anode materials in two-electrode cells with metallic sodium counter electrodes and 1 M NaACS omega10861-10867https://www.ebi.ac.uk/biostudies/studies/S-EPMC12917836biostudies-literatureElectrochemical Conversion of CO<sub>2</sub> via Molten Salt Electrolysis to Produce Hard Carbon Materials for Sodium-Ion Battery.PMC12917836Yamaguchi TShirakura YKado YfalseElectrochemical Conversion of CO<sub>2</sub> via Molten Salt Electrolysis to Produce Hard Carbon Materials for Sodium-Ion Battery.The conversion of CO₂ into valuable carbon materials is essential for establishing a circular economy. This study syntheses hard carbon materials from CO₂ using high-temperature molten salt electrolysis and explores their use as anodes in sodium-ion batteries. CO₂ gases are absorbed as carbonate ions in molten salts and then electrochemically decomposed into solid carbon. When electrolysis was conducted at 600 °C in molten LiCl-KCl containing Li₂CO₃, the generated carbon was amorphous and nongraphitizable, as determined by XRD analysis and Raman spectroscopy. The obtained carbons before and after heat treatments at 900-1800 °C were employed as the anode materials in two-electrode cells with metallic sodium counter electrodes and 1 M Na2026-01-01T00:00:00Z2026 Feb2026-07-16T17:59:34.015Z2026-07-09T11:10:27.107ZS-EPMC129178364172659610.1021/acsomega.6c00423