• 文献标题:   Simple microwave synthesis and improved electrochemical performance of Nb-doped MnO2/reduced graphene oxide composite as anode material for lithium-ion batteries
  • 文献类型:   Article
  • 作  者:   WANG XQ, YIN MY, XUE HD, SU Y, TIAN SR
  • 作者关键词:   nb doping, mno2, graphene, anode material, liion batterie
  • 出版物名称:   IONICS
  • ISSN:   0947-7047 EI 1862-0760
  • 通讯作者地址:   Tianjin Polytech Univ
  • 被引频次:   1
  • DOI:   10.1007/s11581-017-2401-6
  • 出版年:   2018

▎ 摘  要

Niobium-doped MnO2/reduced graphene oxide (Nb-MnO2/RGO) composite has been successfully synthesized via a simple microwave radiation method. The samples were systematically studied by X-ray diffraction (XRD), thermogravimetric analysis (TG), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscope (TEM), and electrochemical measurements. As the anode material for lithium-ion batteries, the Nb-MnO2/RGO (molar ratio of Mn/Nb = 50:1) (NMG50) showed an outstanding reversible discharge capacity of 556.6 mAh g(-1) after 50 cycles with a capacity retention of 77% at a charge-discharge rate of 0.1 A g(-1) and the reversible discharge capacity can still retain 223.3 mAh g(-1) at a current of 1 A g(-1), which is much higher than those for Nb-MnO2/RGO (molar ratio of Mn/Nb = 10:1) (NMG10) and undoped MnO2/RGO (MG). The improved electrochemical performance could be attributed to the proper amount of Nb doping, which could enhance both the conductivity and the structure stability of MnO2.