Hydrogen generation and carbon dioxide storage system capable of selectively dissolving and storing carbon dioxide

A hydrogen generation and carbon dioxide storage system, the system comprising:

• a metal-carbon dioxide battery including an anode, a cathode, and a separator interposed between the anode and the cathode;
• a first supply unit configured to supply a first electrolyte to the anode;
• a second supply unit configured to supply a second electrolyte including hydrogen ions and an aqueous alkali bicarbonate solution to the cathode;
• a separation unit configured to separate hydrogen gas from a product discharged from the cathode;
• and
• a dissolution unit disposed downstream of the separation unit and configured to prepare a precursor by receiving a starting material including water supplied from outside and dissolving carbon dioxide contained in a mixed gas supplied from outside in the starting material.