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

M. B. Sreedhara, Subhra Gope, Badri Vishal, Ranjan Datta, Aninda J. Bhattacharyya, C. N.R. Rao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)2302-2310
Number of pages9
JournalJOURNAL OF MATERIALS CHEMISTRY A
Volume6
Issue number5
DOIs
StatePublished - 2018

Bibliographical note

Funding Information:
MBS thanks the Council of Scientic and Industrial Research (CSIR), India, for a research fellowship.

Publisher Copyright:
© 2018 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • General Chemistry
  • Renewable Energy, Sustainability and the Environment
  • General Materials Science

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