Jadoon Jamil K, Pham Phuong V
Department of Physics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan.
Department of Physics, University of Engineering and Technology, Lahore, Pakistan.
Nanotechnology. 2024 Aug 12;35(43). doi: 10.1088/1361-6528/ad6a6a.
This study describes the fabrication of composite electrodes comprising TiOand reduced graphene oxide layers using a moderate-temperature hydrothermal method. The morphology, crystalline structure, chemical composition, and optical features of the prepared composites were analyzed by FE-SEM, x-ray diffraction, FTIR, and UV-visible spectroscopy. The cyclic voltammetry (CV) and Nyquist plots were used to assess the electrochemical and impedance responses of the composite electrodes, respectively. The analysis revealed that the incorporation of RGO reduced the TiObandgap to 3.87 eV 3.02 eV and improved the specific capacitance, enhancing the TiO-RGO electrode's supercapacitive performance. CV studies highlight that the TiO-RGO composite has a high specific capacitance of 152 F gat a substantially faster scan rate of 25 mV sin a 1.0 M-KOH dilute electrolyte. These findings confirmed the applicability of the fabricated electrodes as prospective supercapacitor electrodes.
本研究描述了采用中温水热法制备包含TiO和还原氧化石墨烯层的复合电极。通过场发射扫描电子显微镜（FE-SEM）、X射线衍射、傅里叶变换红外光谱（FTIR）和紫外可见光谱对制备的复合材料的形态、晶体结构、化学成分和光学特性进行了分析。循环伏安法（CV）和奈奎斯特图分别用于评估复合电极的电化学和阻抗响应。分析表明，还原氧化石墨烯（RGO）的加入将TiO的带隙降低至3.87 eV 3.02 eV，并提高了比电容，增强了TiO-RGO电极的超级电容性能。CV研究表明，在1.0 M-KOH稀电解质中，TiO-RGO复合材料在25 mV s的大幅更快扫描速率下具有152 F g的高比电容。这些发现证实了所制备电极作为潜在超级电容器电极的适用性。
