Effect of Temperature on Morphology and Electrochemical Capacitive Properties of Electrospun Carbon Nanofibers and Nickel Hydroxide Composites

摘要: Binder-free Ni(OH)2/carbon nanofiber composites used as supercapacitor electrodes were fabricated through the chemical precipitation of Ni(OH)2 on electrospun carbon nanofibers. These exhibited a hierarchical structure in which nanoflakes connected with fiber network. We varied annealing temperature to investigate morphological progress and subsequent electrochemical performance composite fibers. The remained unchanged when was lower than 300 °C. At 350 °C, most converted NiO, NiO peeled off from surface, forming microparticles. Electrochemical measurements revealed that specific capacity increased an increase reached maximum 455 C/g at In addition, favorable cycling stability after 2000 cycles without fading. satisfactory because synergetic effect faradaic behavior easily accessible electron transport peeling aggregation microparticles caused reduction composites.