Improved Alkali Intercalation of Carbonaceous Materials in Ammonia Solution

Author(s)
Bence Gabor Markus, Peter Szirmai, Sandor Kollarics, Balint Nafradi, Laszlo Forro, Julio C. Chacon-Torres, Thomas Pichler, Ferenc Simon
Abstract

Alkali-intercalated graphite compounds represent a compelling modification of carbon with significant application potential and various fundamentally important phases. The intercalation of graphite with alkali atoms (Li and K) using liquid ammonia solution as a mediating agent is reported. Alkali atoms dissolve well in liquid ammonia, which simplifies and speeds up the intercalation process, and it also avoids the high temperature formation of alkali carbides. Optical microscopy, Raman, and electron spin-resonance spectroscopy attest that the prepared samples are highly and homogeneously intercalated to a level approaching stage-I intercalation compounds. The method and the synthesis route may serve as a starting point for the various forms of alkali-atom-intercalated carbon compounds (including carbon nanotubes and graphene), which can be exploited in energy storage and further chemical modifications.

Organisation(s)
Electronic Properties of Materials
External organisation(s)
Budapest University of Technology and Economics, École polytechnique fédérale de Lausanne, Yachay Tech University
Journal
Physica Status Solidi. B: Basic Research
Volume
256
No. of pages
6
ISSN
0370-1972
DOI
https://doi.org/10.1002/pssb.201900324
Publication date
08-2019
Peer reviewed
Yes
Austrian Fields of Science 2012
Condensed matter, Spectroscopy
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/improved-alkali-intercalation-of-carbonaceous-materials-in-ammonia-solution(66db5ea4-371f-4b9c-9eea-c94ef549be38).html