Carbonaceous materials of the boron/carbon/nitrogen (B/C/N) system and carbon/nitrogen (C/N) system have been reviewed. A material with a composition BC
2N ma
de by CVD had the graphite-like layer structure.
Sodium was intercalated into and
de-intercalated out of BC
2N by an electrochemical method, and the material can be used as an ano
de of
sodium ion batteries. Magnesium was intercalated into BC
2N by vapor phase reaction. The
intercalations can be explained by a relation between the ionization potentials of metals and electron affinities of the host materials. C/N materials have a high hardness, are photoluminescent and exhibit reversible ion adsorption/
desorption in solution. These properties
depend on composition, chemical bonding and structure, and should be useful in wi
de fields.
[TANSO 2013 (No. 258) 165-70.]
