Alkali metal bilayer intercalation in graphene

Yung-Chang Lin (), Rika Matsumoto, Qiunan Liu, Pablo Solís-Fernández, Ming-Deng Siao, Po-Wen Chiu, Hiroki Ago and Kazu Suenaga ()
Additional contact information
Yung-Chang Lin: National Institute of Advanced Industrial Science and Technology (AIST)
Rika Matsumoto: Tokyo Polytechnic University
Qiunan Liu: Osaka University
Pablo Solís-Fernández: Kyushu University
Ming-Deng Siao: National Tsing Hua University
Po-Wen Chiu: National Tsing Hua University
Hiroki Ago: Kyushu University
Kazu Suenaga: National Institute of Advanced Industrial Science and Technology (AIST)

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Alkali metal (AM) intercalation between graphene layers holds promise for electronic manipulation and energy storage, yet the underlying mechanism remains challenging to fully comprehend despite extensive research. In this study, we employ low-voltage scanning transmission electron microscopy (LV-STEM) to visualize the atomic structure of intercalated AMs (potassium, rubidium, and cesium) in bilayer graphene (BLG). Our findings reveal that the intercalated AMs adopt bilayer structures with hcp stacking, and specifically a C6M2C6 composition. These structures closely resemble the bilayer form of fcc (111) structure observed in AMs under high-pressure conditions. A negative charge transferred from bilayer AMs to graphene layers of approximately 1~1.5×1014 e−/cm−2 was determined by electron energy loss spectroscopy (EELS), Raman, and electrical transport. The bilayer AM is stable in BLG and graphite superficial layers but absent in the graphite interior, primarily dominated by single-layer AM intercalation. This hints at enhancing AM intercalation capacity by thinning the graphite material.

Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-023-44602-3 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-023-44602-3

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-023-44602-3

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().