Solid electrolyte, electrolyte layer and battery

A solid electrolyte comprising a hexagonal perovskite-related compound of formula (2):

• Ba7-αNb(4−x−y)Mo(1+x)MyO(20+z) (2)
• wherein
• M is a cation of at least one element selected from the group consisting of V, Cr, Mn, Ge, Si, and Zr,
• α represents a value of 0 or more and 0.5 or less,
• x represents a value of −1.1 or more and 1.1 or less,
• y represents a value of more than 0 and 1.1 or less,
• z represents a value of −2.0 or more and 2.0 or less,
• with the proviso that |x|+y≥0.01.

A solid electrolyte comprising a hexagonal perovskite-related compound-of formula (1):

• Ba7-αNb(4−x−y)Mo(1+x)MyO(20+z) (1)
• wherein
• M is a cation of at least one element selected from the group consisting of Ag, Al, At, Au, Be, Bi, Br, Ca, Cd, Ce, Co, Cr, Cu, Dy, Er, Eu, Fe, Ga, Gd, Ge, Hf, Hg, Ho, I, In, Ir, La, Li, Lu, Mg, Mn, Na, Nb, Nd, Ni, Np, Os, P, Pb, Pd, Po, Pr, Pt, Pu, Re, Rh, Ru, S, Sb, Sc, Se, Si, Sm, Sn, Sr, Ta, Tb, Tc, Te, Ti, Tl, Tm, U, V, W, Xe, Y, Yb, Zn, and Zr,
• 0≤α≥0.5,
• −1.1≤x≤0.35,
• 0<y≤0.35, and
• −2.0≤z≤2.0,
• with the proviso that |x|+y≥0.01.

A solid electrolyte comprising a hexagonal perovskite-related compound of formula (1):

• Ba7-αNb(4−x−y)Mo(1+x)MyO(20+z) (1)
• wherein
• M is a cation of at least one element selected from the group consisting of Ag, Al, At, Au, Be, Bi, Br, Ca, Cd, Ce, Co, Cr, Cu, Dy, Er, Eu, Fe, Ga, Gd, Ge, Hf, Hg, Ho, I, In, Ir, La, Li, Lu, Mg, Mn, Na, Nb, Nd, Ni, Np, Os, P, Pb, Pd, Po, Pr, Pt, Pu, Re, Rh, Ru, S, Sb, Sc, Se, Si, Sm, Sn, Sr, Ta, Tb, Tc, Te, Ti, Tl, Tm, U, V, W, Xe, Y, Yb, Zn, and Zr,
• α represents a value of 0 or more and 0.5 or less,
• x represents a value of −1.1 or more and 1.1 or less,
• y represents a value of more than 0 and 1.1 or less,
• z represents a value of −2.0 or more and 2.0 or less,
• with the proviso that, |x|+y≥0.01, and
• wherein the compound's space group is not R-3m.

A solid electrolyte comprising a hexagonal perovskite-related compound of formula (1):

• Ba7-αNb(4−x−y)Mo(1+x)MyO(20+z) (1)
• wherein
• M is a cation of at least one element selected from the group consisting of Ag, Al, At, Au, Be, Bi, Br, Ca, Cd, Ce, Co, Cr, Cu, Dy, Er, Eu, Fe, Ga, Gd, Ge, Hf, Hg, Ho, I, In, Ir, La, Li, Lu, Mg, Mn, Na, Nb, Nd, Ni, Np, Os, P, Pb, Pd, Po, Pr, Pt, Pu, Re, Rh, Ru, S, Sb, Sc, Se, Si, Sm, Sn, Sr, Ta, Tb, Tc, Te, Ti, Tl, Tm, U, V, W, Xe, Y, Yb, Zn, and Zr,
• α represents a value of 0 or more and 0.5 or less,
• x represents a value of −1.1 or more and 1.1 or less,
• y represents a value of more than 0 and 1.1 or less, and
• z represents a value of −2.0 or more and 2.0 or less,
• with the proviso that, |x|+y=0.01, and
• wherein the compound's space group is P-3m1.