<p>The elevated level of CO₂ in the atmosphere has severely affected human life, to solve these problems fundamentally, promoting the high-value utilization of CO₂ is necessary. Against the background of reduced metal production cost and increasing demand for clean energy storage, it is possible to utilize metal thermal reduction method to convert CO₂ into high-value carbon storage production. However, due to the problematic thermal reduction process, the existing metallic thermal reduction method of CO₂ produces high graphitized carbon materials with poor electrochemical properties. We propose a multicomponent inorganic molten salt-assisted strategy to slow down the intense thermal reduction process of CO₂. At the same time, the waste salt generated during the conversion process can be recycled through the electrolytic metallurgy process of aluminum/magnesium to achieve green production. In the aluminum/magnesium thermal reduction of CO₂, benefitting from the multi-advantages of LiCl + KCl mixed salt and melt, micropores amorphous carbon can synthesized, which has abundant micropores. MAC has a specific capacity of 319 mAh g⁻¹ after 100 cycles at 50&#xa0;mA&#xa0;g⁻¹. The amorphous carbon prepared from molten salt-assisted aluminum/magnesium thermal reduction of CO₂ holds great potential in high-performance sodium-ion batteries. The strategy provides a new approach to achieve clean, economical and easy production of carbon materials for energy storage, and is expected to be a driving force in solving global climate change and energy shortage.</p> Graphical abstract <p></p>