Unique hierarchical mesoporous LaCrO3 perovskite oxides for highly efficient electrochemical energy storage applications
| Autor: | Yasir Abbas, Nabi Ullah, Iqra Ashraf, Shahid Hussain, Mingsong Wang, Asma Shaheen, Guanjun Qiao, Guiwu Liu, Muhammad Sufyan Javed, Nimra Aslam |
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| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Materials science Process Chemistry and Technology Electrochemistry Capacitance Surfaces Coatings and Films Electronic Optical and Magnetic Materials Dielectric spectroscopy Chemical engineering Electrode Materials Chemistry Ceramics and Composites Cyclic voltammetry Mesoporous material Perovskite (structure) |
| Zdroj: | Ceramics International. 45:15164-15170 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2019.04.258 |
| Popis: | Following sol-gel route, hierarchical mesoporous nanostructures of lanthanum chromates (LaCrO 3 ) perovskite oxides are successfully synthesized for supercapacitor applications. The structural behaviors of nano perovskite oxides are investigated using X-rays diffraction, low and high resolution scanning and transmission electron microscopes, photoelectron X-ray spectroscopy, and Brunauer-Emmett-Teller (BET). The as-prepared LaCrO 3 powders is mingled with activated carbon and subsequently glazed on a flexible carbon cloth current collector (LCO@CC). The electrochemical capabilities of LCO@CC based electrode, such as: cyclic voltammetry, galvanostatic charge:discharge and electrochemical impedance spectroscopy are investigated in neutral M LiCl aqueous solutions. Moreover, the fabricated LCO@CC electrode achieves maximum capacitance of 1268 F/g at 2 A/g and retains excellent cyclic ability of 91.5% after 5000 charge:discharge cycles. The efficient electrochemical performances of carbon cloth decorated LaCrO 3 electrode are credited to dynamic charge storage mechanism by fast redox reaction of electrolyte-electrode interactions with extremely low charge transfer resistance. |
| Databáze: | OpenAIRE |
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