In the present work, we demonstrate the supercapacitor applications of titania nanotube @$\alpha$-Fe₂O₃ composites ([email protected]$\alpha$-Fe₂O₃) synthesized via successive anodization–hydrothermal methods. The structure and morphology of the composites were studied through XRD and SEM analyses and the electrochemical properties were studied through CV, GCD and EIS analyses. The hybrid composite, TNT-Fe4 exhibited highest supercapacitor performance with a capacitance of 157.32 mFcm⁻² at a scan rate of 5 mVs⁻¹ owing to the unique micro/nano hybrid architecture of the composite, comprising of a hierarchical layered Fe₂O₃ coating on titania nanotubes. The asymmetric supercapacitor fabricated with the composite electrode together with activated carbon showed an excellent capacitance of 142.86 mFcm⁻² with an energy density of 38.$88\mathrm{\mu }\mathrm{W}$hcm⁻² at 0.2 mAcm⁻². The high rate capability and outstanding cyclic stability of the composite validate the potential application of the device in charge-storage systems.

在当前的工作中，我们演示了二氧化钛纳米管@的超级电容器应用。$\alpha$-Fe ₂ O ₃复合材料（[电子邮件保护]$\alpha$-Fe ₂ O ₃）通过连续阳极氧化-水热法合成。通过XRD和SEM分析研究了复合材料的结构和形貌，并通过CV，GCD和EIS分析研究了电化学性能。混合复合材料TNT-Fe4表现出最高的超级电容器性能，在5 mVs ^-1的扫描速率下的电容为157.32 mFcm ^-2，这是由于复合材料的独特的微/纳米混合结构所致，该结构包含分层的Fe ₂ O ₃二氧化钛纳米管上的涂层。用复合电极和活性炭制成的不对称超级电容器表现出出色的电容142.86 mFcm ^-2 能量密度为38$88\mathrm{\mu }\mathrm{w\; ^}$hcm ^-2在0.2 mAcm ^-2。复合材料的高倍率能力和出色的循环稳定性证明了该器件在电荷存储系统中的潜在应用。