Atomic layer deposition of crystalline epitaxial MoS2 nanowall networks exhibiting superior performance in thin-film rechargeable Na-ion batteries

Sreedhara, M. B. ; Gope, Subhra ; Vishal, Badri ; Datta, Ranjan ; Bhattacharyya, Aninda J. ; Rao, C. N. R. (2018) Atomic layer deposition of crystalline epitaxial MoS2 nanowall networks exhibiting superior performance in thin-film rechargeable Na-ion batteries Journal of Materials Chemistry A, 6 (5). pp. 2302-2310. ISSN 2050-7488

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Official URL: http://doi.org/10.1039/C7TA09399C

Related URL: http://dx.doi.org/10.1039/C7TA09399C

Abstract

We have grown ultrathin crystalline epitaxial thin films of MoS2 on c-sapphire by employing atomic layer deposition, without the need for post-annealing. The films have been characterized by using 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 a 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.

Item Type:Article
Source:Copyright of this article belongs to Royal Society of Chemistry.
ID Code:116765
Deposited On:09 Apr 2021 09:16
Last Modified:09 Apr 2021 09:16

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