Journal
JOURNAL OF ENERGY STORAGE
Volume 50, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.est.2022.104633
Keywords
Cyclic stability; Ternary nanocomposite; TiO2-ZnO/MCM-41; Supercapacitors; Storage mechanism
Categories
Funding
- Khoy University of Medical Sciences [400000005, IR.KHOY.REC.1400.006]
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This study reports the design and preparation of a new ternary TiO2-ZnO/MCM-41 nano composite and evaluates its electrochemical performance. The results show that the nanocomposite exhibits a high specific surface area and excellent cycling stability, indicating its potential application in supercapacitors.
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 nano composite 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 ? 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 m(2).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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