Rechargeable Li/CO2–O2 (2 : 1) battery and Li/CO2 battery

Abstract

A Li/CO₂–O₂ (2 : 1, volume ratio) battery and a Li/CO₂ battery with discharging specific capacities of 1808 mA h g⁻¹ and 1032 mA h g⁻¹, respectively, are reported. Li₂CO₃ is the main discharge product in the Li/CO₂–O₂ (2 : 1) battery and can be decomposed during charging. In the Li/CO₂ battery, the main discharge products could be Li₂CO₃ and carbon. Both batteries can be cycled reversibly at room temperature.