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Atomic Layer Deposition of Crystalline Epitaxial MoS2 Nanowall Networks Exhibiting Superior Performance in Thin-film Rechargeable Na-ion Batteries

Abstract

We have grown ultrathin crystalline epitaxial thin films of MoS2 on c-sapphire employing atomic layer deposition, without the need for post-annealing. The films have been characterized by various microscopic and spectroscopic techniques. The crystallographic epitaxial relationships between the films and the substrate are <01-10> Al2O3 || <11-20> MoS2 and <0001>Al2O3 || <0001> MoS2. Interestingly, the films show a high density of nanowalls and exhibit high surface to volume ratio. The high surface area of the nanowall network results in excellent electrochemical characteristics as demonstrated by the performance of the Na-ion battery with MoS2 as the active electrode. The battery exhibits high capacity, remarkable stability, cyclability and high rate capability over a wide range of operating currents, even in the absence of conducting and binder additives. The MoS2 Li-ion battery also exhibits similar features.

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Publication details

The article was received on 25 Oct 2017, accepted on 23 Dec 2017 and first published on 02 Jan 2018


Article type: Paper
DOI: 10.1039/C7TA09399C
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    Atomic Layer Deposition of Crystalline Epitaxial MoS2 Nanowall Networks Exhibiting Superior Performance in Thin-film Rechargeable Na-ion Batteries

    S. M. B, S. Gope, B. Vishal, R. Datta, A. J. Bhattacharyya and C. N. R. Rao, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA09399C

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