For the investigation of 1, 2, CP1, and CP2 as active materials in LIBs, we fabricated composite electrodes containing 60 wt% of active material, 30 wt% carbon black (ECP-600JD) as the conductive additive, and 10 wt% polyvinylidene fluoride (PVDF) binder. A lithium metal disk was used as the counter electrode and LiPF6 (1.0 M) in a mixture of ethylene carbonate (EC), dimethyl carbonate (DMC) and ethyl methyl carbonate (EMC) (1:1:1, v/v) with 1% vinylene carbonate (VC) was used as the electrolyte. The cells were first evaluated using cyclic voltammetry (CV) over the voltage range of 0.05-3.0 V vs Li/Li + at 0.2 mV s -1 . As shown in Figure -b, the two polymers show two quasireversible anodic peaks at 1.35 and 2.20 V (vs Li/ Li + ), that are comparable to the performance of small molecules and related polymers in our previous report. In addition, the peak-to-peak area under the electrochemical event at 2.20 V were enhanced for CP2 as result of the introduction of benzothiadiazole unit as an additional redox center. This could consequently improve the capacity of the battery. In comparison, the two small molecules 1 and 2 exhibit less-obvious peaks (Figure ), probably due to their undesired bulk morphologies, which hampers the effective full utilization of the redox-active units.