 Research on lithium-sulfur and lithium-oxygen batteries has increased significantly in the past decade, driven by their high theoretical energy density and abundance of sulfur and oxygen. However, progress toward practical device development is hindered by fundamental key issues. Sodium-based battery systems are also being explored due to their natural abundance and potential for low-cost components. The substitution of lithium for sodium has a significant impact on the overall properties of the cell reaction, but whether this will lead to a more reversible cell chemistry is still uncertain. Some initial reports on room temperature Na slash S8 and Na slash O2 cells show promising differences compared to Li slash S8 and Li slash O2 systems. This article was authored by Philippa Delhelm, Pascal Hartmann, Conrad Elbender and others.