Electrochemical Intercalation of Lithium Ions into NbSe2 Nanosheets

Emily Hitz, Jiayu Wan, Anand Patel, Yue Xu, Louisa Meshi, Jiaqi Dai, Yanan Chen, Aijiang Lu, Albert V. Davydov, Liangbing Hu

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)11390-11395
Number of pages6
JournalACS applied materials & interfaces
Volume8
Issue number18
DOIs
StatePublished - 11 May 2016

Keywords

  • 2D materials
  • electrochemical intercalation
  • lithium
  • niobium selenide
  • transparent electrodes

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