论文部分内容阅读
采用静电纺丝结合还原氮化法制备多孔TiN纤维,利用XRD、SEM、TEM和N_2吸脱附等分析其结构,使用循环伏安和充放电测试其电化学性能。结果表明,纤维为立方TiN相,纤维连续,存在较为丰富的介孔结构,其比表面积为21.55 m~2/g。样品在不同扫率下的CV曲线均呈类矩形,由电流密度为20 mA/g时GCD曲线计算其比电容为24.03 F/g,在电流密度为50 mA/g时,经4500次充放电循环后样品的比电容仍能保持90%以上,当功率密度为20 W/kg时,样品的能量密度为3.3 Wh/kg。因此,采用本方法制备的多孔TiN纤维在超级电容器领域具有应用潜力。
Porous TiN fibers were prepared by electrospinning combined with reduction nitridation. The structure of the porous TiN fibers was analyzed by XRD, SEM, TEM and N 2 adsorption-desorption. The electrochemical properties of the porous TiN fibers were tested by cyclic voltammetry and charge-discharge tests. The results show that the fibers are cubic TiN phase with continuous fibers and abundant mesoporous structure. The specific surface area is 21.55 m 2 / g. The CV curve of the sample at different scan rates showed a quasi-rectangular shape, the specific capacitance was 24.03 F / g calculated from the GCD curve at a current density of 20 mA / g, and at 4500 mA at a current density of 50 mA / g The specific capacitance of the sample remained above 90% after cycling, and the energy density of the sample was 3.3 Wh / kg at a power density of 20 W / kg. Therefore, the porous TiN fiber prepared by the method has potential application in the field of supercapacitors.