聚丙烯腈基多层异质柔性复合薄膜制备及其压电特性OA北大核心CSTPCD

To achieve synergistic improvement of flexibility and piezoelectric output in piezoelectric nanogenerators,polyacrylonitrile(PAN)piezoelectric thin film and PAN/reduced graphene oxide(rGO)composite piezoelectric thin films were prepared by spin coating method.Two typical sandwich heterojunction piezoelectric nanogenerator(PNG),namely PAN-PAN/rGO-PAN and PAN/rGO-PAN-PAN/rGO,were prepared by stacking hot pressing method.Systematic study was performed to understand the effect of rGO doping content on the output performance of the PAN/rGO composite PNG and two typical heterojunction composite PNG.The results show that the maximum output voltage of the PAN-PAN/rGO-PAN and PAN/rGO-PAN-PAN/rGO composite PNG can reach 4.61 V and 5.80 V,respectively,which is 34.0％and 68.6％higher than that of the three-layer homogeneous PAN-PAN-PAN PNG.The maximum output power of the PAN/rGO0.4-P AN-PAN/rGO0.4 composite PNG is 2.02 μW at the external load resistance of 10 MΩ.In addition,it demonstrates that the three-layer heterogeneous composite PNG has excellent stability after 4500 pressing-releasing cycles test,which shows its great potential applications in flexible wearable electronic devices and flexible electronic skin.