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Enhancing lithium-ion batteries performance via electron-beam irradiation strategies: A case study of graphene aerogels loaded with SnO2 quantum dots.
- Source :
-
Electrochimica Acta . Aug2018, Vol. 281, p769-776. 8p. - Publication Year :
- 2018
-
Abstract
- 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 electron-beam irradiation is a facile approach to perform surface modification for the ultrathin cross-stacked graphene aerogels loaded with SnO 2 quantum dots, resulting in a remarkable modulation on the lithium storage performance. It is found that the as-synthesized SnO 2 /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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *LITHIUM-ion batteries
*ELECTRON beams
*GRAPHENE
*METALLIC oxides
*QUANTUM dots
Subjects
Details
- Language :
- English
- ISSN :
- 00134686
- Volume :
- 281
- Database :
- Academic Search Index
- Journal :
- Electrochimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 130838317
- Full Text :
- https://doi.org/10.1016/j.electacta.2018.06.028