rGO-encapsulated Sn-doped V2O5 nanorods for high-performance Supercapacitors

• Published in: Materials today communications Vol. 27; p. 102357
• Main Authors: V., Uma Shankar, D., Govindarajan, R., Gopalakrishnan, T., Maiyalagan, M., Joseph Salethraj
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2021
• Subjects: Sn doped V2O5; Sn-V2O5/rGO; Supercapacitors and specific capacitance; V2O5; Sn doped V2O5; Supercapacitors and specific capacitance; V2O5; Sn-V2O5/rGO
• ISSN: 2352-4928; 2352-4928
• DOI: 10.1016/j.mtcomm.2021.102357

[Display omitted] •Sn doped V2O5 nanorods have been fabricated by using sol-gel method.•A simple and efficient method used to produce the reduced graphene oxide encapsulated with Sn doped V2O5 nanorods.•Sn-V2O5/rGO nanocomposites shows the low charge transfer resistance and it deliver high cyclic performance of about 95 % at 1000th cycle.•High electrochemical performance of the Sn-V2O5/rGO nanocomposites can be achieved due to the combination of nanosheet-nanorods-nanoparticles. Reduced graphene oxide (rGO) anchored Sn doped V2O5 (Sn-V2O5/rGO) nanocomposite materials are produced by employing the sol-gel method. The Sn-V2O5/rGO nanocomposite is composed of Sn dopant homogeneously dispersed on V2O5 nanorods and rGO nanosheets. At the time of charge/discharge process, this peculiar structure mainly reduces the amount of Na+ inflation, enhances the electrolyte insertion into the electrode and also increases the conductivity of the Sn doped V2O5 electrode. As results, the Sn-V2O5/rGO, 4%Sn-V2O5 and V2O5 electrodes exhibits excellent electrochemical performance and it provides high reversible specific capacitance of about 159.37, 139.06 and 120.10 F g−1 at 1 Ag−1. Even at this high current density, this Sn-V2O5/rGO electrode also withstands the capacitance maximum of about 73 %. Concretely, the prepared Sn-V2O5/rGO electrode material exhibits the low charge transfer resistivity than 4%Sn-V2O5 and V2O5 electrodes. Moreover, the electrode obeys the excellent capacitance retention (95 %) at 5 Ag−1 for the 1000th cycle.