Preparation and Property of a Three-Dimensional Nitrogen-Doped Graphene-Fe~(3+)/P(AA-co-DMA)Hydrogel

摘要

In this study,a three-dimensional nitrogen-doped graphene(3DNG)-Fe~(3+)/poly(acrylic acid-co-N,N-dimethylacrylamide)(3DNG-Fe~(3+)/P(AA-co-DMA))hydrogel with strong flexibility and excellent self-healing property was prepared.The 3DNG-Fe~(3+)/P(AA-co-DMA)hydrogel was characterized by Fourier transform infrared spectrometer(FT-IR),scanning electron microscope(SEM).The specific surface area and pore size distribution of the 3DNG-Fe~(3+)/P(AA-co-DMA)hydrogel were measured by using Brunauer-Emmett-Teller(BET)method.The experimental results demonstrate that when 6 mol% FeCl3 was added,the breaking strain of Fe~(3+)/P(AA-co-DMA)hydrogel reaches 1149%,and the tensile strength reaches 689 kPa.Furthermore,the recovery degree of Fe~(3+)/P(AA-co-DMA)hydrogel was almost 100% after 24 h.The supercapacitors based on 3DNG-Fe~(3+)/P(AA-co-DMA)hydrogel have a specific capacitance value of 231.8 Fg~(-1)at 1 A·g~(-1),and conductivity is 0.053 S·cm~(-1).When the power density is 5 kWkg~(-1),the energy density of the device is 38.7 Whkg~(-1).