Two-dimensional layered Ti3C2 MXene nanosheets decked with ZrO2 nanospheres for the high-performance solid-state hybrid supercapacitors

• Published in: Journal of energy storage 2024-09, Vol.98, p.112821, Article 112821
• Main Authors: S.S., Pradeepa, K., Sutharthani, R., Suba Devi, Fu, Yen-Pei, M., Sivakumar
• Format: Article
• Language: English
• Subjects: Energy density; Hybrid supercapacitor; Titanium carbide; Two-dimensional material; Zirconium oxide
• ISSN: 2352-152X
• DOI: 10.1016/j.est.2024.112821

Two-dimensional (2D) MXenes have developed as promising materials for high-performance supercapacitors owing to their distinctive layered structure, facilitating both high redox surface sites and enhanced ion transport kinetics. In our present study, we successfully synthesized titanium carbide‑zirconium oxide nanocomposites (Ti3C2-ZrO2 NC) in a facile and budgetary manner, positioning them as viable materials for electrochemical supercapacitor applications. The 2D layered Ti3C2 nanosheets in Ti3C2-ZrO2 NC hetrojunction elevated the charge-carrier separation efficiency by diminishing the insertion distance to reach the surface of the electrode. Galvanostatic charge-discharge (GCD) profiles showcased the nonlinear behaviour of Ti3C2-ZrO2 NC electrode, revealing their battery-like charge storage process that delivers exceptional performance with a high specific capacity of 483.6C/g at 1 A/g of current density along with an impressive capacitive retention of 88.85 % even after 5000 charge-discharge cycles. The assembled Ti3C2-ZrO2//AC solid-state hybrid supercapacitor (SHSC) device exhibited notable energy and power densities of 75.60 Wh/kg and 1445 W/kg respectively. These findings underscore the pivotal role of 2D layered MXene structure in enhancing the conductivity and reaction kinetics that facilitate exceptional charge storage mechanisms and position them as promising materials for future energy storage devices. [Display omitted] •2D - Ti3C2 was synthesized by Exfoliation technique.•Ti3C2-ZrO2 NC exhibits the total capacitance 1076.2C/g by Trasatti method.•From Dunn's method, Capacitive-Diffusion contributions are 60.49 % and 39.50 % respectively.•Ti3C2-ZrO2//AC SHSC delivering the high energy density of 75.63 Wh/kg and the high power density of 1445 W/kg.