Electrochemical characteristics of poly(3-methyl thiophene)/sulfonated-SEBS composite electrode for polymer battery

We, in this study, focus on the effect of sulfonated poly(styrene-ethylene-butylene-styene) (SSEBS) as a binder to enhance electrochemical property of poly(3-methyl thiophene) (P3MT) as a active material of cathode in redox system. P3MT was polymerized using FeCl3 as both a dopant and an initiator. The cathode was prepared to cast on Al mesh the slurry mixed P3MT, carbon black and binder (8:1:1 wt.%). The specific discharge capacity of P3MT–SSEBS electrode is high as 80 mAh/g, while that of P3MT–SEBS and P3MT–PVDF electrodes have lower values as 50 and 25 mAh/g, respectively. The reason for this is that SSEBS acts as a binder as well as a dopant. In an advance, the effect of sulfonation promotes the miscibility, contact area and affinity.