Explain that rechargeable cells run spontaneous redox reactions on discharge that are reversed by an applied current on charging, and deduce the charging reactions by reversing given discharge electrode reactions, and vice versa.
Sodium ions are produced at the anode from the sodium atoms stored in the hard carbon. (i) State the half-equation for the reaction occurring at the anode while the battery discharges. (ii) The battery is rechargeable. Annotate the diagram below to show the…