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Binary Cu/ZnO decorated graphene nanocomposites as an efficient anode for lithium ion batteries

[Display omitted] Binary metal/metal oxide doped graphene nanocomposites have received wide attention as an effective anode material in Li-ion batteries. The binary composition metal/metal oxide improves the storage space and the conductivity of the electrode. The doped graphene enhances the structu...

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Published in:Journal of industrial and engineering chemistry (Seoul, Korea) 2018, 59(0), , pp.108-114
Main Authors: Jacob, Liyamol, K., Prasanna, M.R., Vengatesan, P., Santhoshkumar, Lee, Chang Woo, Mittal, Vikas
Format: Article
Language:English
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Summary:[Display omitted] Binary metal/metal oxide doped graphene nanocomposites have received wide attention as an effective anode material in Li-ion batteries. The binary composition metal/metal oxide improves the storage space and the conductivity of the electrode. The doped graphene enhances the structural and electronic properties of the electrode. In the present work, we report a Cu/ZnO hybrid nanoparticle-decorated graphene nanocomposite as an advanced anode material for the high-performance Li-ion batteries. Three different compositions of the hybrid Cu/ZnO/graphene nanocomposites have been synthesized by changing the concentration of Cu precursors in the hybrid. The nanocomposite of 0.05M Cu precursor and 0.1M ZnO precursor shows higher surface area (SBET=168.7g/m2) and excellent electrochemical results. X-ray photoelectron spectroscopy (XPS) analysis revealed that the Cu nanoparticle exists in +2 oxidation state on the ZnO lattice with the graphene nanostructure. Transmission electron microscopy (TEM) analysis shows the distribution of Cu/ZnO nanoparticles over the graphene sheets with a size of around 10–50nm. From the electrochemical analysis, we inferred that the hybrid possesses a stable and specific capacity of 630mAhg−1 at a current rate of 100mAg−1 with almost 95% capacity retention for up to 100 cycles. To highlight the importance of binary Cu/ZnO doped graphene nanocomposites, their respective base namely, ZnO/graphene and Cu/graphene composites have also been studied.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2017.10.012