Staging Phenomena in Lithium-Intercalated Boron-Carbon.

Autor: Kalkan B; Advanced Material Research Laboratory, Department of Physics Engineering , Hacettepe University , Beytepe, Ankara 06800 , Turkey.; Advanced Light Source , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States., Ozdas E; Advanced Material Research Laboratory, Department of Physics Engineering , Hacettepe University , Beytepe, Ankara 06800 , Turkey.
Jazyk: angličtina
Zdroj: ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2019 Jan 30; Vol. 11 (4), pp. 4111-4122. Date of Electronic Publication: 2019 Jan 18.
DOI: 10.1021/acsami.8b19142
Abstrakt: Hole-doped LiBC has become of great interest as a candidate for high-temperature superconductivity with its structural similarity to MgB 2 and as a possible cathode for rechargeable lithium batteries with the large graphenelike BC hexagons. The limitation on synthesis studies has detracted from the structural and electronic properties and application studies of Li x BC. Here, we present the successful synthesis of hole-doped Li 0.5 BC and its structural and electronic characterization using detailed structural modeling based on a unique stage-2 Daumas-Hérold-type domain structure consistent with X-ray diffraction data. The strong intralayer motion of the guest Li island induces extraordinary structural properties, such as staging and staging disorder, which are confirmed by the compressibility results obtained from Li 0.85 BC (anisotropic cell compressibility with B 0 ∼ 134 GPa) and Li 0.48 BC (isotropic cell compressibility with B 0 ∼ 190 GPa). Li deficiency increases the conductivity; however, the temperature-dependent conductivity is dominated by the thermal excitation of carriers in a strongly disordered regime with well-defined localized states.
Databáze: MEDLINE
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