search for
Impurity-Free, Direct Transferable Large-Area MoS$_2$ Monolayer and Studies on Its Li-Storage Properties
New Phys.: Sae Mulli 2018; 68: 166~172
Published online February 28, 2018;
© 2018 New Physics: Sae Mulli.

Velusamy SENTHILKUMAR, Yong Soo KIM*

Department of Physics and Energy Harvest Storage Research Center (EHSRC), University of Ulsan, Ulsan 44610, Korea
Correspondence to:
Received December 8, 2017; Revised December 28, 2017; Accepted January 5, 2018.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
A MoS$_2$ monolayer with a large-area grain boundary was prepared over a SiO$_2$/Si substrate by using conventional chemical vapor deposition. The structural and the optical properties of MoS$_2$ were investigated by using a range of analytical techniques. These studies clearly revealed the formation of a monolayer with a single-crystalline nature. The prepared monolayer MoS$_2$ was transferred directly to a copper electrode by using hydrofluoric acid under a impurity-free condition. The electrochemical performance of the MoS$_2$ monolayer was evaluated in a half-cell assembly with metallic Li. The maximum reversible capacity of Li/MoS$_2$ was $\sim$26 $\mu$Ahcm$^{–2}$ at 1 $\mu$Acm$^{–2}$. Furthermore, the test cell also exhibited excellent cycling stability and capacity retention characteristics. A cyclic voltammetry study was performed to understand the Li-storage mechanism for this MoS$_2$ monolayer.
PACS numbers: 81.07.Bc, 81.15.Gh, 82.45.Cc, 82.47.Aa
Keywords: MoS$_2$, Monolayer, Chemical vapor deposition, Li-ion battery, Capacity

February 2018, 68 (2)
  • Scopus
  • CrossMark