Sodium–carbon dioxide batteries can

Sodium–carbon dioxide batteries can theoretically store 10 times as much energy weight for weight as commercial lithium–ion batteries. They work similarly to lithium–air batteries but use cheaper, more abundant sodium and carbon dioxide. Moreover, many electrolytes react with the compounds formed during discharge in a lithium–air battery – a problem that doesn’t occur in sodium–carbon dioxide batteries, which only produce sodium carbonate and carbon.