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Preparation and Characterization of Nanomaterial Consisting of Silica Aerogel & Carbon Tested as an Electrode in Non-Aqueous Media Containing Lithium Salt.
Abstract
Silica aerogel (SiO2ag) was combined with carbonaceous material in the pyrolysis process of hydrocarbons. The obtained nanocomposite SiO2ag/C was amorphous, partially preserving the porous structure of SiO2ag. The specific surface area changes from 445.6 m2/g for pure SiO2ag to 205.52 m2/g SiO2ag/C. The 29Si MAS-NMR shows a three-dimensional matrix with silicon atoms connected to other silicon atoms by four and three oxygen bridges. The Raman spectrum reveals the state of carbonaceous material, with typical D and G peaks, derived from hydrocarbon pyrolysis. SiO2ag/C was tested as an electrode in contact with LiPF6 in the EC/DMC electrolyte. Electrochemical measurements showed the presence of complex redox couple activities of SiO2ag/C. XPS was employed to identify products obtained under polarization of SiO2ag/C. Silica reduction proceeds with Li2O, Li2Si2O3, Li2Si2O5,Li4SiO4 and LixSi formation. The charge capacity after 30 cycles is equal to 550 mAh/g.
Authors (5)
-
Zbigniew Olejniczak
- The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences .
-
Czesław Kapusta
- AGH University of Science and Technology, Faculty of Physics and Applied Computer Science Department of Solid State Physics
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
International Journal of Electrochemical Science
no. 11,
edition 3,
pages 1997 - 2017,
ISSN: 1452-3981 - Language:
- English
- Publication year:
- 2016
- Bibliographic description:
- Lisowska-Oleksiak A., Wicikowska B., Nowak A., Olejniczak Z., Kapusta C.: Preparation and Characterization of Nanomaterial Consisting of Silica Aerogel & Carbon Tested as an Electrode in Non-Aqueous Media Containing Lithium Salt.// International Journal of Electrochemical Science. -Vol. 11, iss. 3 (2016), s.1997-2017
- Verified by:
- Gdańsk University of Technology
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