Electrochemical performance of MWCNT reinforced ZnO anodes for Li-ion batteries

•MWCNT based buckypapers were produced via vacuum filtration.•ZnO/buckypapers were then produced via thermal evaporation followed by an in situ plasma oxidation.•MWCNT/ZnO nanocomposites revealed a capacity of 527mAhg−1 up to 100 cycles. Carbon nanotube thin sheets – buckypapers – were prepared from...

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Bibliographic Details
Published in:Microelectronic engineering 2014-04, Vol.118, p.54-60
Main Authors: Guler, Mehmet Oguz, Cetinkaya, Tugrul, Tocoglu, Ubeyd, Akbulut, Hatem
Format: Article
Language:English
Subjects:
Anodes
Applied sciences
Carbon nanotubes
CNT Buckypaper
Corrosion
Corrosion mechanisms
Cross-disciplinary physics: materials science
rheology
Direct energy conversion and energy accumulation
Dispersions
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Electrochemical tests
Exact sciences and technology
Imaging
Lithium batteries
Lithium-ion batteries
Materials science
Metal oxides
Metals. Metallurgy
Nanoscale materials and structures: fabrication and characterization
Nanostructure
Nanotubes
Physics
Plasma oxidation
Production techniques
Surface treatment
Thermal evaporation
Zinc oxide
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Summary:•MWCNT based buckypapers were produced via vacuum filtration.•ZnO/buckypapers were then produced via thermal evaporation followed by an in situ plasma oxidation.•MWCNT/ZnO nanocomposites revealed a capacity of 527mAhg−1 up to 100 cycles. Carbon nanotube thin sheets – buckypapers – were prepared from multi-walled carbon nanotubes oxidized with different oxidizing agents. ZnO thin films were then coated onto buckypapers via thermal evaporation techniques followed by an in situ plasma oxidation. SEM imaging showed that the ZnO films were uniformly coated on the surface of the MWCNT based buckypapers. ZnO/MWCNT nanocomposites were used as the active anode materials for lithium-ion batteries, showing improved cyclability when compared with the literature data. The reversible capacities were as high as 380mAhg−1, 522mAhg−1 and 527mAhg−1 after 100th cycles for the films oxidized 1:3, 1:2 and 1:1 (Ar:O2) partial gas pressures. The improvement in the electrochemical characteristics was attributed to the nano-scale dimension and high dispersion of the metal oxide particles and the conductivity and ductility of the CNTs matrix.
ISSN:0167-9317
1873-5568
DOI:10.1016/j.mee.2013.12.029