纳米复合材料
材料科学
循环伏安法
超级电容器
三元运算
介电谱
介孔材料
化学工程
电化学
比表面积
电容
纳米技术
电极
催化作用
化学
有机化学
计算机科学
工程类
物理化学
程序设计语言
作者
Ali Ehsani,Mohammad Bigdeloo,Hassan Alamgholiloo,Esrafil Asgari,Amir Sheikhmohammadi,Shahram Nazari,Bayram Hashemzadeh,Naser Ghasemian
标识
DOI:10.1016/j.est.2022.104633
摘要
The development of composite materials in nano-scale for electrochemical activity has remained an enormous challenge in the supercapacitors (SCs) arena. In this work, a new type of ternary TiO2-ZnO/MCM-41 nanocomposite was designed and prepared for further improvement to the electrochemical performance. First, mesoporous MCM-41 silica material was prepared with a sol-gel method and then calcinate under 550 °C to form porous material. Subsequently, ZnO-TiO2 crystals were grown on the MCM-41 silica material surface via a solvothermal method to obtain ternary nanocomposite. The morphology and structure features of the ternary nanocomposite were investigated with FESEM, TEM, and AFM. From the BET analysis, the specific surface area (SSA) of the nanocomposite obtained 580 m2·g−1, which provided an excellent platform for the transmission of ions and electrons. After that, energy storage performance was evaluated by electrochemical measurements such as cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). The electrochemical performance measurements demonstrate a specific capacitance (Cs) as high as 642.4 F·g−1. Moreover, it exhibits excellent cyclic stability with 98.7% capacitance retention after 5000 cycles, which is beyond that of most of the reported silica-based SCs. The current study provided a rational design and synthesis of multifunctional catalysts for the development of SCs applications.
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