Hierarchical MnO2@NiCo2O4@Ti3SiC2/carbon cloth core-shell structure with superior electrochemical performance for all solid-state supercapacitors
Autor: | Hao Xuxia, Rui Liu, Weili Wang, Mingzhe Leng, Jianqiang Bi, Zheng Xing, Weikang Yan, Xicheng Gao |
---|---|
Rok vydání: | 2021 |
Předmět: |
010302 applied physics
Supercapacitor Materials science Process Chemistry and Technology 02 engineering and technology 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Capacitance Electrospinning Energy storage Surfaces Coatings and Films Electronic Optical and Magnetic Materials Chemical engineering Nanofiber 0103 physical sciences Electrode Materials Chemistry Ceramics and Composites 0210 nano-technology Current density |
Zdroj: | Ceramics International. 47:292-300 |
ISSN: | 0272-8842 |
DOI: | 10.1016/j.ceramint.2020.08.133 |
Popis: | Core-shell hierarchical structured composites have demonstrated great advantages in numerous energy storage devices. In particular, structured composites with rationally structural components and controllable morphology are the most effective in enhancing electrochemical properties. In this work, MnO2@NiCo2O4@Ti3SiC2/CC (carbon cloth) core-shell hierarchical structured composites were designed and successfully synthesized via electrospinning followed by a two-step hydrothermal reaction. The Ti3SiC2/CC nanofibers and core-shell nanoarrays were able to improve the specific capacitance and cycling stability. In the three-electrode system, the specific capacitance of MnO2@NiCo2O4@Ti3SiC2/CC was observed as 1938.2 F/g at a current density of 1 A/g, while the rate capability retention was observed as 81.7% between 1 and 10 A/g. Furthermore, a superior cycling stability was observed following 5000 cycles with a specific capacitance retention rate of 55.4%. Employing MnO2@NiCo2O4@Ti3SiC2/CC as the all solid-state supercapacitor positive electrode exhibited a high energy density of 58.0 W h/kg at the power density of 800 W/kg. Results demonstrate the potential of the MnO2@NiCo2O4@Ti3SiC2/CC as an electrode material with phenomenal electrochemical properties for supercapacitors. |
Databáze: | OpenAIRE |
Externí odkaz: |