• 文献标题:   Ultrathin hollow-structured NiCo2O4 nanorod supported on improved N-doped graphene for superior supercapacitor applications
  • 文献类型:   Article
  • 作  者:   LI Y, ZHANG MM, PAN DH, WANG Y, XIE JM, YAN ZX, JING JJ
  • 作者关键词:   nico2o4 nanorod, nitrogendoped graphene, hydrothermal synthesi, supercapacitor
  • 出版物名称:   JOURNAL OF ALLOYS COMPOUNDS
  • ISSN:   0925-8388 EI 1873-4669
  • 通讯作者地址:   Jiangsu Univ
  • 被引频次:   6
  • DOI:   10.1016/j.jallcom.2017.06.138
  • 出版年:   2017

▎ 摘  要

Novel and hollow-structured bimetallic oxide (NiCo2O4) anchored on nitrogen-doped graphene (NG) has been manufactured by a hydrothermal-calcination method. The ultrafine hollow-structured NiCo2O4 nanorod can be dexterously grafted on an N-doped graphene surface (NiCo2O4/NG) by regulating the alkali sources. The obtained NiCo2O4/NG composite shows much larger specific capacitance and stability according to the cyclic voltammetry (CV) measurements and galvanostatic charge-discharge (GCD) examinations. The electrochemical measurements show that NiCo2O4/NG-H3 composite exhibited a high specific capacitance of 2147.4 F g(-1) at 1 A g(-1), as well as perfect cycling stability (93.7% capacitance retention after 2000 cycles), indicating a potential application in electrochemical supercapacitors. The XPS spectra of NiCo2O4/NG-H3 further reveal that the excellent performance should be attributed to the electron-donating (synergistic effect) between NiCo2O4 and NG. (C) 2017 Elsevier B. V. All rights reserved.