A study of the Ce3+/Ce4+ redox couple in sulfamic acid for redox battery application

► SA served as media electrolyte for Ce3+/Ce4+ was reported. ► A Zn-Ce redox battery was assembled and it showed impressive charge-discharge performance. ► The performance of Zn-Ce battery was improved by adding carbonate such as NH4HCO3. Its energy efficiency reached up to 53%.