Microstructural Development and Rheological Study of a Nanocomposite Gel Polymer Electrolyte Based on Functionalized Graphene for Dye-Sensitized Solar Cells.
作者： Pedram Manafi , Hossein Nazockdast , Mohammad Karimi , Mojtaba Sadighi , Luca Magagnin
关键词: Ionic conductivity 、 Glass transition 、 Polymer 、 Differential scanning calorimetry 、 Electrolyte 、 Chemical engineering 、 Materials science 、 Dye-sensitized solar cell 、 Ionic liquid 、 Nanocomposite
摘要: For a liquid electrolyte-based dye-sensitized solar cell (DSSC), long-term device instability is known to negatively affect the ionic conductivity and performance. These issues can be resolved by using so called quasi-solid-state electrolytes. Despite enhanced of graphene nanoplatelets (GNPs), their inherent tendency toward aggregation has limited application in In present study, GNPs were chemically modified polyethylene glycol (PEG) through amidation reaction obtain dispersible nanostructure poly(vinylidene fluoride-co-hexafluoro propylene) copolymer oxide (PVDF–HFP/PEO) polymer-blended gel electrolyte. Maximum (4.11 × 10−3 S cm−1) was obtained with optimal nanocomposite polymer electrolyte (GPE) containing 0.75 wt% functionalized (FGNPs), corresponding power conversion efficiency 5.45%, which 1.42% 0.67% higher than those nanoparticle-free optimized-GPE (containing 1 GNP) DSSCs, respectively. Incorporating an optimum dosage FGNP, homogenous particle network fabricated that could effectively mobilize redox-active species amorphous region matrix. Surface morphology assessments further performed scanning electron microscopy (SEM). The results rheological measurements revealed plasticizing effect (IL), offering proper insight into polymer–particle interactions within polymeric nanocomposite. Based on differential calorimetry (DSC) investigations, decrease glass transition temperature (and resultant increase flexibility) highlighted influence IL polymer–nanoparticle interactions. shed light effectiveness FGNPs for DSSCs.
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