▎ 摘　　要

The aim of this contribution is to introduce high performance materials for thermoelectric devices. A nanopolymer composite of PVAGNP ((polyvinyl alcohol ((PVA)(0.6)/graphene nanoplatelets (GNP)(0.4)))(1-x)(V2O5)(x) where x = 0, 2.5, 5, 7.5 and 10 wt% has been prepared using a solution cast technique. The influence of V2O5 additives on the morphology, structure, thermal and electrical properties of PVA has been examined by FTIR,. XRD, TGA, DC and IV techniques. The disassociation of V2O5 to (V4+) and (V5+) in the composites acts as a co-bridge which can facilitate the translational electronic motion, which enhances the charge carrier mobility and the electrical conductivity. A prototype cell was constructed using (PVAGNP)(1-x)(GNP)(x) nanocomposites with constantan wire. The addition of V2O5 improves the thermoelectric properties of the (PVA)(0.6)(GNP)(0.4) nanocomposite, where the Seebeck coefficient is increased from 23.1 to 45.8 mu V K-1 from 0 to 10 wt% V2O5, respectively. The power factor is increased from 1.17 x 10(-2) to 36.30 x 10(-2) mu W m(-1) K-2 from 0 to 10 wt% V2O5, respectively, and the ZT is increased from 4.47 x 10(-9) to 1.46 x 10(-7).