凯发

Versatile and ductile conductive carbonized cotton fabrics deposited reduced graphene oxide (rGO) /manganesedioxide (MnO2) arepreparedin this paper. In order to endow multifunction to cotton fabric,graphene oxide (GO) is deposited on cotton fibers by dip-coating cotton fabric in GO aqueous suspension. Subsequently, MnO2nanoparticles are assembled on the surface of cotton fabricthrough in-situ chemical solution deposition. Finally, MnO2/GO/cotton fabrics are carbonized to achieve conductive fabric.The morphology and structures of obtained fabrics are characterized by SEM, XRD, ICP test and element analysis,and their electro-properties including electro-chemical, electro-heating and electro-mechanical propertiesare evaluated and investigated.According to SEM characterization, graphene oxide acts as an important interfacial material to ameliorate the aggregation ofMnO2 nanoparticle and facilitate the precipitation of MnO2 nanoparticles on cotton fabrics. After carbonization, rGO improves the electro-chemical properties of composite fabrics, yielding remarkable specific capacitance of329.4mAh/g at the current density of 100mA/g, which is more than 40% higher than that of control carbonized cotton fabric (231 mAh/g). Furthermore, the flexible electro-heating and electro-mechanical devices from MnO2/rGO@Cfabrics demonstrate remarkable performance, it monotonically increasesto the steady-state maximum temperatures (∆Tmax)36℃ within 5 min under the appliedvoltage 15V while the ∆Tmax=17℃of the control case, and exhibits excellent and repeatable electro-mechanical properties.Thenormalized resistancereachesas high as 0.78at a constant strain (curvature = 0.6 cm-1).These results open up a new route for the design and application of carbonized textiles in flexible supercapacitor, lithium ion battery electrodes, and other wearable insulation clothing and sensors.