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Atomic layer deposition derived amorphous TiO2 thin film decorating graphene nanosheets with superior rate capability.
- Source :
-
Electrochemistry Communications . Aug2015, Vol. 57, p43-47. 5p. - Publication Year :
- 2015
-
Abstract
- Composites consisting of graphene nanosheets (GNSs) decorated with amorphous TiO 2 thin films were synthesized by an atomic layer deposition (ALD) technique. It was revealed that the TiO 2 thin films were uniformly deposited onto the worm-like GNSs. When used as anode materials in lithium ion batteries (LIBs), the TiO 2 –GNS composites deliver a stable capacity of ~ 140 mAh g − 1 after 100 cycles at a specific current of 100 mA g − 1 as well as superior rate capability, accounting for a sustainable 95 mAh g − 1 capacity at a specific current of 1200 mA g − 1 . It is believed that the remarkable electrochemical performance lied in the unique features of the composites, i.e., the amorphous nature of the TiO 2 films and the large surface area of GNSs. The former rendered short Li + diffusion pathways in TiO 2 thin film, while the latter offered excellent electronic conductivity as well as a large intimate contact area between the electrolyte and TiO 2 . This work laid a venue for designing new electrodes for high-performance LIBs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13882481
- Volume :
- 57
- Database :
- Academic Search Index
- Journal :
- Electrochemistry Communications
- Publication Type :
- Academic Journal
- Accession number :
- 103427020
- Full Text :
- https://doi.org/10.1016/j.elecom.2015.05.005