• 文献标题:   Electrolyte and composition effects on the performances of asymmetric supercapacitors constructed with Mn3O4 nanoparticles-graphene nanocomposites
  • 文献类型:   Article
  • 作  者:   XIAO YH, CAO YB, GONG YY, ZHANG AQ, ZHAO JH, FANG SM, JIA DZ, LI F
  • 作者关键词:   hausmannite, mn3o4, graphene, nanocomposite, solvothermal, asymmetric supercapacitor
  • 出版物名称:   JOURNAL OF POWER SOURCES
  • ISSN:   0378-7753 EI 1873-2755
  • 通讯作者地址:   Zhengzhou Univ Light Ind
  • 被引频次:   74
  • DOI:   10.1016/j.jpowsour.2013.07.118
  • 出版年:   2014

▎ 摘  要

Nanocomposites of Mn3O4 nanoparticles and graphene (GR) nanosheets - Mn3O4@GR can be made by growing Mn3O4 nanoparticles directly on the surfaces of GR in solvothermal reactions. The asymmetric supercapacitors constructed with Mn3O4@GR as positive and activated carbon (AC) as negative electrodes, respectively, show highly enhanced performances in energy storage. It was found that the electrolytes employed in constructing electrodes of the devices can influence the performances of Mn3O4@GR supercapacitors dramatically. Compared to their energy density in KOH electrolyte, the devices exhibit improved charge storage performances in Na2SO4 electrolyte. Furthermore, the charge storage abilities of the devices are closely related to the amount of Mn3O4 nanoparticles loaded onto the surface of GR nanosheets. The performances of Mn3O4@GR//AC asymmetric supercapacitors can be optimized by carefully tailoring the composition of electrode materials and adjusting the electrolytes for making the devices. (C) 2013 Elsevier B.V. All rights reserved.