Discovery of hexagonal ternary phase TiInB and its evolution to layered boride TiB.

Author(s) Wang, J.; Ye, T.N.; Gong, Y.; Wu, J.; Miao, N.; Tada, T.; Hosono, H.
Journal Nat Commun
Date Published 2019 05 23
Abstract

MAX phases are a large family of compounds that have been limited, so far, to carbides and nitrides. Here we report the prediction of a compound, TiInB, a stable boron-based ternary phase in the Ti-In-B system, using a computational structure search strategy. This predicted TiInB compound is successfully synthesized using a solid-state reaction route and its space group is confirmed as Pm2 (No. 187), which is in fact a hexagonal subgroup of P6/mmc (No. 194), the symmetry group of conventional MAX phases. Moreover, a strategy for the synthesis of MXenes from MAX phases is applied, and a layered boride, TiB, is obtained by the removal of the indium layer through dealloying of the parent TiInB at high temperature under a high vacuum. We theoretically demonstrate that the TiB single layer exhibits superior potential as an anode material for Li/Na ion batteries than conventional carbide MXenes such as TiC.

DOI 10.1038/s41467-019-10297-8
ISSN 2041-1723
Citation Wang J, Ye T-, Gong Y, Wu J, Miao N, Tada T, et al. Discovery of hexagonal ternary phase TiInB and its evolution to layered boride TiB. Nat Commun. 2019;10(1):2284.

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