• 文献标题:   Facile synthesis of ruhtenium nanoparticles capped by graphene and thiols for high-performance supercapacitors
  • 文献类型:   Article
  • 作  者:   GUO Y, LI Z, XIA YJ, WEI YX, ZHANG JT, WANG YY, HE H
  • 作者关键词:   ruthenium, graphene, nanoparticle, supercapacitor, specific capacitance
  • 出版物名称:   ELECTROCHIMICA ACTA
  • ISSN:   0013-4686 EI 1873-3859
  • 通讯作者地址:  
  • 被引频次:   5
  • DOI:   10.1016/j.electacta.2021.138990 EA AUG 2021
  • 出版年:   2021

▎ 摘  要

Ru nanoparticles (Ru@G, Ru@HT, Ru@DT, and Ru@OT) were prepared by facile chemical reduction of RuCl3 and graphene or thiols. The morphologies and structures of these Ru nanoparticles were ascertained by TEM, FTIR, UV-vis, and XPS, confirming the metallic Ru cores were capped by graphene or thiols. Their applications for supercapacitors were investigated in 0.5 M H2SO4 electrolyte, using cyclic voltammetry, galvanostatic charging-discharging test, and electrochemical impedancemetry. Compared as Ru@HT, Ru@DT, and Ru@OT nanoparticles, Ru@G exhibited greatly improved electrochemical performance and stability. It showed a specific capacitance of 1013 F g(-1) at 0.004 V s(-1) , an energy density of 34.8 W kg(-1) at the power density of 1.79 x 10(-5) W kg(-1), the capacitance retention of 94.9% after 10,000 cycles. The peripheral graphene has good stability and excellent electrical conductivity, so it can provide Ru core stable protection as well as good electron transfer routes, thus Ru@G are suitable for implementation in electrochemical applications. (C) 2021 Elsevier Ltd. All rights reserved.