• 文献标题:   The influence of nitrogen doping on reduced graphene oxide as highly cyclable Li-ion battery anode with enhanced performance
  • 文献类型:   Article
  • 作  者:   TASDEMIR A, KOPUKLU BB, KIRLIOGLU AC, GURSEL SA, YURUM A
  • 作者关键词:   high current rate, high cycle performance, nitrogen doping, reduced graphene oxide, liion batterie, anode
  • 出版物名称:   INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • ISSN:   0360-3199 EI 1879-3487
  • 通讯作者地址:  
  • 被引频次:   15
  • DOI:   10.1016/j.ijhydene.2021.01.099 EA MAR 2021
  • 出版年:   2021

▎ 摘  要

A straightforward, one-step route has been established to fabricate reduced- (rGO) and nitrogen-doped reduced graphene oxide (NrGO) with remarkable lithium-ion storage properties. The graphene oxide (GO) was synthesized as starting material by improved Hummers' method. Thereafter, thermally annealing GO with NH3 at elevated temperature to synthesize NrGO was yielded a more open structure with nitrogen sites suitable for enhanced Li intercalation. NrGO exhibited a reversible capacity of 240 mAhg(-1) at 10 Ag-1 after 500 cycles with 90% capacity retention, which is the best result achieved among graphene oxide-based anodes at this current density. In contrast to rGO, NrGO cells exhibited a gradually increasing capacity profile, reaching up to 114% of the initial capacity at 0.1, 2, and 10 Ag-1 current densities. Results showed that high occupancy of pyridinic N within NrGO enhanced battery performance and cell kinetics upon cycling which offers long-time operability at high current density. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.