Preparation and Electrochemical Performance of Chitosan/Polyvinyl Alcohol-basedComposite Carbon Nanofibers by Electrospinning
ZHANG Tao1,2,3, SUN Youyi1,2,3, LIU Yaqing1,2,3
1 Shanxi Province Key Laboratory of Functional Nanocomposites,Taiyuan 030051; 2 Research Center for Engineering Technology of Polymeric Composites of Shanxi Province,Taiyuan 030051; 3 School of Materials Science and Engineering,North University of China, Taiyuan 030051
Abstract: The electrochemical properties of electrospining chitosan/polyvinyl alcohol-based composite carbon nanofiber membranes prepared at different carbonization temperatures for supercapacitor electrode materials were observed and studied. The structure of carbon nanofiber membranes obtained by different carbonization temperatures was characterized by SEM, XRD and Raman techniques. And the electrochemical performance of carbon nanofiber membranes obtained at different carbonization temperatures was tested by electrochemical techniques such as cyclic voltammetry (CV) and constant current charge/discharge (GCD). The results show that the composite carbon nanofibers prepared at a carbonization temperature of 700 ℃ have good electrochemical performance. The discharge specific capacitance is as high as 215 F/g at a current density of 1 A/g, and the capacity retention rate after 4 000 cycles is almost 100%, showing higher discharge specific capacitance and better cycle stability.
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