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DOE OSTI2020

Materials Data on LiSbF6 by Materials Project

LiSbF6 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. Li1+ is bonded to six equivalent F1- atoms to form LiF6 octahedra that share corners with six equivalent SbF6 octahedra. The corner-sharing octahedral tilt angles are 31°. All Li–F bond lengths are 2.07 Å. Sb5+ is bonded to six equivalent F1- atoms to form SbF6 octahedra that share corners with six equivalent LiF6 octahedra. The corner-sharing octahedral tilt angles are 31°. All Sb–F bond lengths are 1.92 Å. F1- is bonded in a bent 150 degrees geometry to one Li1+ and one Sb5+ atom.

36 MATERIALS SCIENCE↗

NASA NTRS1988

Electrochemical stability of LiMF6 (M = P, As, Sb) in tetrahydrofuran and sulfolane

The electrochemical stability of LiSbF6 and LiPF6 in aprotic organic solvents has been investigated. Electrochemical studies, conductivity measurements, and open-circuit stability tests were conducted on LiSbF6 in tetrahydrofuran and sulfolane. Cyclic voltammetric studies of SbF6(-) were compared with those of AsF6(-) and PF6(-) anions. Sb(V) was reduced to Sb(III), and then to Sb(0). AsF6(-) was reduced to AsF3, while no reduction of PF6(-) was observed. The reduction products of AsF6(-) and SbF6(-) passivated the glassy carbon electrode, presumably due to LiF precipitation. Peak potentials were observed to shift in the positive direction as a function of concentration. This was accounted for on the basis of a follow-up chemical reaction.

Nanjundiah, C.↗