Electrochemical Intercalation of Lithium Ions into NbSe2 Nanosheets.
Transition metal dichalcogenides (TMDCs) have been known for decades to have unique properties and recently attracted broad attention for their two-dimensional (2D) characteristics. NbSe2 is a metallic TMDC that has been studied for its charge density wave transition behavior and superconductivity but is still largely unexplored for its potential use in engineered devices with applications in areas such as electronics, optics, and batteries. Thus, we successfully demonstrate and present evidence of lithium intercalation in NbSe2 as a technique capable of modifying the material properties of NbSe2 for further study. We demonstrate successful intercalation of Li ions into NbSe2 and confirm this result through X-ray diffraction, noting a unit cell size increase from 12.57 to 13.57 Å in the c lattice parameter of the NbSe2 after intercalation. We also fabricate planar half-cell electrochemical devices using ultrathin NbSe2 from platelets to observe evidence of Li-ion intercalation through an increase in the optical transmittance of the material in the visible range. Using 550 nm wavelength light, we observed an increase in optical transmittance of 26% during electrochemical intercalation.
Department of Materials Science and Engineering, University of Maryland , College Park, Maryland 20742, United States.
Emily
E
Hitz
Department of Materials Science and Engineering, University of Maryland , College Park, Maryland 20742, United States.
Jiayu
J
Wan
Materials Science and Engineering Division, National Institute of Standards and Technology , Gaithersburg, Maryland 20878, United States.
Anand
A
Patel
Department of Materials Science and Engineering, University of Maryland , College Park, Maryland 20742, United States.
Yue
Y
Xu
Materials Science and Engineering Division, National Institute of Standards and Technology , Gaithersburg, Maryland 20878, United States.|Department of Materials Engineering, Ben Gurion University of the Negev , Beer Sheva 84105, Israel.
Louisa
L
Meshi
Department of Materials Science and Engineering, University of Maryland , College Park, Maryland 20742, United States.
Jiaqi
J
Dai
Department of Materials Science and Engineering, University of Maryland , College Park, Maryland 20742, United States.
Yanan
Y
Chen
Department of Materials Science and Engineering, University of Maryland , College Park, Maryland 20742, United States.
Aijiang
A
Lu
Materials Science and Engineering Division, National Institute of Standards and Technology , Gaithersburg, Maryland 20878, United States.
Albert V
AV
Davydov
Department of Materials Science and Engineering, University of Maryland , College Park, Maryland 20742, United States.
Liangbing
L
Hu
2D materials; electrochemical intercalation; lithium; niobium selenide; transparent electrodes