Electrocatalytic properties of poly(3,4-ethylenedioxythiophene) (PEDOT) in Li-O2 battery

The catalytic activity of poly(3,4-ethylenedioxythiophene) (PEDOT) was investigated during oxygen reduction/evolution reactions in Li–O2 batteries. PEDOT was prepared by in situ chemical polymerization of 3,4-ethylenedioxythiophene monomer in carbon matrix. PEDOT significantly reduces the overvoltage of the charging process in a Li–O2 battery. The electrocatalytic effect of PEDOT can be attributed to its redox activity. Apparently, PEDOT acts as a mediator in electron transfer during discharge and charge processes.

► PEDOT was prepared by in situ chemical polymerization in carbon matrix.
► PEDOT has electrocatalytic effect toward oxygen reduction/evolution reactions.
► PEDOT significantly reduces the over-voltage during charging in a Li–O2 battery.
► The electrocatalytic effect of PEDOT can be attributed to its redox activity.