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Unusually High Ion Conductivity in Large-Scale Patternable Two-Dimensional MoS2Film

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Title
Unusually High Ion Conductivity in Large-Scale Patternable Two-Dimensional MoS2Film
Author(s)
Park, Juhong; Bhoyate, Sanket; Kim, Young-Hoon; Young-Min Kim; Young Hee Lee; Conlin, Patrick; Cho, Kyeongjae; Choi, Wonbong
Publication Date
2021-07
Journal
ACS NANO, v.15, no.7, pp.12267 - 12275
Publisher
American Chemical Society
Abstract
© 2021 American Chemical Society.The advancement of ion transport applications will require the development of functional materials with a high ionic conductivity that is stable, scalable, and micro-patternable. We report unusually high ionic conductivity of Li+, Na+, and K+ in 2D MoS2 nanofilm exceeding 1 S/cm, which is more than 2 orders of magnitude higher when compared to that of conventional solid ionic materials. The high ion conductivity of different cations can be explained by the mitigated activation energy via percolative ion channels in 2H-MoS2, including the 1D ion channel at the grain boundary, as confirmed by modeling and analysis. We obtain field-effect modulation of ion transport with a high on/off ratio. The ion channel is large-scale patternable by conventional lithography, and the thickness can be tuned down to a single atomic layer. The findings yield insight into the ion transport mechanism of van der Waals solid materials and guide the development of future ionic devices owing to the facile and scalable device fabrication with superionic conductivity.
URI
https://pr.ibs.re.kr/handle/8788114/10448
DOI
10.1021/acsnano.1c04054
ISSN
1936-0851
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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