Abstract
A series of LaMn1±xO3 perovskite (x=0, 0.05, 0.1) has been synthesized via a facile sol–gel method and applied as supercapacitor electrodes. The morphology, phase structure, composition, chemical states of constituents and electrochemical properties are investigated. As a result, all the LaMn1±xO3 samples revealed a single mesoporous phase of perovskite with typical pore sizes from 2 to 5nm. The nonstoichiometric LaMn1.1O3 sample showed much higher specific capacity (202.1mAhg−1/727.6Cg−1 at 1Ag−1) than stoichiometric LaMnO3 perovskite (114.4 mAhg−1/411.8Cg−1 at 1Ag−1). Detailed chemical analysis demonstrated that the presence of point defects such as oxygen and cation vacancies, and a high Mn4+/Mn3+ ratio contributed to the excellent electrochemical performance. Furthermore, the cycle stability analyses of the LaMn1±xO3 perovskite revealed that LaMn1.1O3 manifested an exceptionally high rate capability. These results prove that nonstoichiometric LaMn1.1O3 can be a promising material for supercapacitor electrodes.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
