Scalable Synthesis of Few-Layered 2D Tungsten Diselenide (2H-WSe2) Nanosheets Directly Grown on Tungsten (W) Foil Using Ambient-Pressure Chemical Vapor Deposition for Reversible Li-Ion Storage

Rajashree Konar, R. Rosy, Ilana Perelshtein, Eti Teblum, Madina Telkhozhayeva, Maria Tkachev, Jonathan J. Richter, Elti Cattaruzza, Andrea Pietropolli Charmet, Paolo Stoppa, Malachi Noked, Gilbert Daniel Nessim

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31 Scopus citations

Abstract

We report a facile two-furnace APCVD synthesis of 2H-WSe2. A systematic study of the process parameters is performed to show the formation of the phase-pure material. Extensive characterization of the bulk and exfoliated material confirm that 2H-WSe2 is layered (i.e., 2D). X-ray diffraction (XRD) confirms the phase, while high-resolution scanning electron microscopy (HRSEM), high-resolution transmission electron microscopy (HRTEM), and atomic force microscopy (AFM) clarify the morphology of the material. Focused ion beam scanning electron microscopy (FIB-SEM) estimates the depth of the 2H-WSe2 formed on W foil to be around 5-8 μm, and Raman/UV-vis measurements prove the quality of the exfoliated 2H-WSe2. Studies on the redox processes of lithium-ion batteries (LiBs) show an increase in capacity up to 500 cycles. On prolonged cycling, the discharge capacity up to the 50th cycle at 250 mA/g of the material shows a stable value of 550 mAh/g. These observations indicate that exfoliated 2H-WSe2 has promising applications as an LiB electrode material.

Original languageEnglish
Pages (from-to)19409-19421
Number of pages13
JournalACS Omega
Volume5
Issue number31
DOIs
StatePublished - 11 Aug 2020

Bibliographical note

Publisher Copyright:
Copyright © 2020 American Chemical Society.

Funding

G.D.N. is thankful to the Israel Science Foundation and Israel Prime Ministry Office for alternatives initiative for partial funding of this study under the Israel Research center for Electrochemical Propulsion (INREP) (Grant: ISF 2797/11) and European Union’s Horizon 2020 research and innovation program under grant agreement no. 814413, project ADMAIORA. Madina Telkhozhayeva is thankful to Erasmus + ICM (ERASMUS + KA107 ICM).

FundersFunder number
Israel Prime Ministry Office
Horizon 2020 Framework Programme814413
Israel Science Foundation
Israel National Research Center for Electrochemical PropulsionISF 2797/11

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