Unique hierarchical mesoporous LaCrO3 perovskite oxides for highly efficient electrochemical energy storage applications. Issue 12 (15th August 2019)

• Record Type: Journal Article
• Authors: Hussain, Shahid; Javed, Muhammad Sufyan; Ullah, Nabi; Shaheen, Asma; Aslam, Nimra; Ashraf, Iqra; Abbas, Yasir; Wang, Mingsong; Liu, Guiwu; Qiao, Guanjun
• Is Part Of: Ceramics international. Volume 45:Issue 12(2019)
• Page Start: 15164
• Page End: 15170
• Publication Date: 2019-08-15
• Subjects: Lanthanum chromate -- Hierarchical nanoflowers -- Sol-gel -- Carbon-cloth -- Supercapacitor; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.04.258
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Following sol-gel route, hierarchical mesoporous nanostructures of lanthanum chromates (LaCrO3 ) 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 LaCrO3 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 LaCrO3 electrode are credited to dynamic charge storage mechanism by fast redox reaction of electrolyte-electrode interactions with extremely low charge transfer resistance. Graphical abstract: Image 1