Poly(vinylidene fluoride)‐Graphene Oxide composite films were prepared by solution casting followed by hot press technique with variation of Graphene Oxide content up to 1.6 vol%. High Resolution Scanning Electron Microscope and Raman spectroscopy were used to investigate the morphology and the dispersion of GO. X‐ray diffraction (XRD) and Fourier transform infrared spectra were analyzed to identify and estimate the fraction of β phase. All the composite film samples are found to have fraction of β phase >80%. Dielectric constant of the composite films increases with increase in Graphene Oxide content up to 0.15 vol% and with further increment; it causes decrease in dielectric constant. Both dielectric loss tangent and ac conductivity show increasing trend with increment of Graphene Oxide content. Both remnant polarization and energy density are affected by Graphene Oxide loading. Remnant polarization increases with Graphene Oxide content whereas energy density follows the same variation trend that of dielectric constant.

中文翻译：

---

氧化石墨烯负载量对热压聚偏二氟乙烯基复合膜铁电和介电性能的影响

聚偏二氟乙烯-氧化石墨烯复合膜是通过溶液流延和热压技术制备的，氧化石墨烯含量的变化最高为1.6 vol％。用高分辨率扫描电子显微镜和拉曼光谱研究GO的形貌和分散。分析了X射线衍射（XRD）和傅立叶变换红外光谱，以鉴定和估计β相的比例。发现所有复合膜样品的分数都为β相> 80％。复合膜的介电常数随氧化石墨烯含量的增加而增加，最高可达0.15 vol％，并随其增加而增加。它导致介电常数降低。介电损耗角正切和交流电导率均随氧化石墨烯含量的增加而增加。残余极化和能量密度均受氧化石墨烯负载的影响。残余极化随着氧化石墨烯含量的增加而增加，而能量密度遵循介电常数相同的变化趋势。