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Title: Reversible and selective ion intercalation through the top surface of few-layer MoS2

Journal Article · · Nature Communications

Electrochemical intercalation of ions into the van der Waals gap of two-dimensional (2D) layered materials is a promising low-temperature synthesis strategy to tune their physical and chemical properties. It is widely believed that ions prefer intercalation into the van der Waals gap through the edges of the 2D flake, which generally causes wrinkling and distortion. Here we demonstrate that the ions can also intercalate through the top surface of few-layer MoS2 and this type of intercalation is more reversible and stable compared to the intercalation through the edges. Density functional theory calculations show that this intercalation is enabled by the existence of natural defects in exfoliated MoS2 flakes. Furthermore, we reveal that sealed-edge MoS2 allows intercalation of small alkali metal ions (e.g., Li+ and Na+) and rejects large ions (e.g., K+). Lastly, these findings imply potential applications in developing functional 2D-material-based devices with high tunability and ion selectivity.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1490649
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 81 works
Citation information provided by
Web of Science

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Cited By (6)

Reversible Conversion between Schottky and Ohmic Contacts for Highly Sensitive, Multifunctional Biosensors journal November 2019
Unlocking Few‐Layered Ternary Chalcogenides for High‐Performance Potassium‐Ion Storage journal June 2019
Unveiling highly ambient-stable multilayered 1T-MoS 2 towards all-solid-state flexible supercapacitors journal January 2019
Multiple roles of a heterointerface in two-dimensional van der Waals heterostructures: insights into energy-related applications journal January 2019
Probing permeation of energetic hydrogen atoms through molybdenum disulphide on graphene platform journal July 2019
A generic method to control hysteresis and memory effect in Van der Waals hybrids journal January 2020

Figures / Tables (5)


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