材料科学
五氧化二铁
电极
纳米复合材料
石墨烯
钒
氧化物
纳米棒
化学工程
超级电容器
纳米片
电化学
无机化学
纳米技术
化学
冶金
工程类
物理化学
作者
Uma Shankar,Yuttana Mona,P. Suganya,P. Senthil Kumar,D. Govindarajan,V. Mangla Gowri,E. Narayanamoorthi,Pei‐Chien Tsai,Yuan-Chung Lin,Vinoth Kumar Ponnusamy
标识
DOI:10.1016/j.psep.2024.06.017
摘要
In this work, we demonstrate a novel, facile synthesis of reduced graphene oxide nanosheets decorated samarium-doped vanadium pentoxide (RGO/Sm:V2O5) nanocomposite material and explore its application toward supercapacitor and direct methanol oxidation process. As-fabricated material and electrode were well-characterized to evaluate its surface morphology and functionalities. Results indicate a maximum capacitance value of 544 F/g for RGO/Sm:V2O5 modified electrode than the 2%Sm:V2O5 (346 F/g) and V2O5 (133 F/g) modified electrodes. In addition, an excellent Rct value (3.2 Ω) was achieved for the RGO-loaded Sm:V2O5 electrode than the 2%Sm:V2O5 electrode (4.7Ω). The RGO/Sm:V2O5 electrode also shows higher cyclic efficiency (98%) at the 1000th cycle than the non-RGO loaded Sm:V2O5 electrodes. Furthermore, the fabricated electrodes were also examined for the direct methanol oxidation performances, and the results indicate a higher current density value of 181 mA/cm2 for RGO/Sm:V2O5 electrode than 2%Sm:V2O5 electrode (139 mA/cm2). The excellent electrochemical performance of the RGO/Sm: V2O5 electrode is mainly due to the presence of RGO nanosheet in the synthesized nanocomposite material. Therefore, as-prepared material can be applied as an excellent alternative electrode material for energy storage and conversion systems.
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