• 文献标题:   Enhancing lithium-ion batteries performance via electron-beam irradiation strategies: A case study of graphene aerogels loaded with SnO2 quantum dots
  • 文献类型:   Article
  • 作  者:   HUANG SS, WANG WF, CHEN DY, HU ZJ, JIANG Y, CHEN ZW, LI Z, PAN DY, ZHAO B
  • 作者关键词:   graphene aerogel, sno2 quantum dot, electronbeam irradiation, microstructural evolution, energy storage
  • 出版物名称:   ELECTROCHIMICA ACTA
  • ISSN:   0013-4686 EI 1873-3859
  • 通讯作者地址:   Shanghai Univ
  • 被引频次:   4
  • DOI:   10.1016/j.electacta.2018.06.028
  • 出版年:   2018

▎ 摘  要

Exploring versatile strategies for microstructural evolution and surface modification are of fundamental importance in the development of advanced electrode materials. In this work, we report that electronbeam irradiation is a facile approach to perform surface modification for the ultrathin cross-stacked graphene aerogels loaded with SnO2 quantum dots, resulting in a remarkable modulation on the lithium storage performance. It is found that the as-synthesized SnO2/graphene aerogels composites irradiated at 280 kGy exhibit excellent high reversible lithium storage capacity, good rate capability and cycling stability, which retains a discharge capacity of 703 mAh g(-1) after 50 cycles at 0.1 C rate. Microstructure analysis indicates that the enhanced electrochemical properties are mainly attributed to the exfoliation of graphene nanosheets, the increase of amorphization, disorder, defects and the removal of partial oxygen-containing functional groups on the surface of graphene nanosheets. The strategy presented here demonstrates that the electron-beam irradiation is a potential strategy to improve the electrochemical performance of graphene-based metal oxides. (C) 2018 Elsevier Ltd. All rights reserved.