静电纺丝结合还原氮化法制备多孔TiN纤维及电化学研究

Synthesis of Porous TiN Fiber via Reduction-nitridationReaction Based on Electrospinning and Its Electrochemical Performance

摘要:

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N₂吸脱附等分析其结构,采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 m₂/g。电化学测试表明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容量仍能保持90 %以上,当功率密度为0.02 kW/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。

Abstract:

The porous titanium nitride fibers were prepared by electrospinning combined with reduction-nitride process. The structural information of the prepared fibers can be characterized by XRD, SEM, TEM and BET. And the electrochemical feature was characterized by cyclic voltammetry and charge-discharge measurements. The results showed that the synthesized TiN continuous fiber was cubic TiN phase, and there existed abundant mesoporous structure. The specific surface area of fiber was 21.55 m₂/g. The CV curves at different scan rate were similar to the rectangle. The specific capacitance was 24.03 F/g when the current density was 20 mA/g. When the current density was 50 mA/g, the specific capacitance remained above 90 % after charge-discharge measurement for 4500 times. Moreover, the power density was 0.02 kW/kg and the energy density was 3.3 Wh/kg. In summary, the porous TiN fibers have great potential application in the field of super capacitor.