Vitreous materials with ionic conductivity, the preparation of same and the electrochemical applications thereof

Claim 1

A doped vitreous material with a network former system, network modifier system, and a doping system having the general formula I: xFo--yM--zD (I) in which: Fo represents the network former system and comprises a compound of the formula A a R b or several compounds of said formula different from each other, A being selected from Si, Ge, P, S, B, Nb, As, V, Cr, Mo and R from O,S, Se, A and R further corresponding to chemically compatible elements, M represents the network modifier system having the formula N m R c , N being selected from Li, Na, K and Ag and R having, independently, one of the meanings given above for the network former elements, a b, m and c represent the indices corresponding to the stoichiometry of the constituents in a given group and, x, y and z, different from 0 and whose sum equals to 1, represent the indices corresponding to the overall molar fractions respectively of the compound or compounds forming the former system, the modifier system and the doping salt of the material, the values of these indices being compatible with the vitreous range of a given material, d represents the doping system, wherein D is formed of at least two doping salts, the salt having the highest dissociation constant being partially substituted by an another salt or other salts whose dissociation constant are lower, in an amount giving an increase of conductivity, said doping system having formula N n Y p , the meaning of N in the group NY, being for each salt identical to that of N in the group NR, Y having in each of these salts different meanings selected from I, Br, Cl, F, ClO 4 , CF 3 , SO 3 , SCN, SO 4 , and n and p represent the indices corresponding to the stoichiometry of the constituents in a given group and the elements A, R and Y being such that the materials have a conductivity of at least 10 -4 Ω -1 cm -1 , at room temperature when N represents Ag, and a conductivity of at least 10 -8 Ω -1 cm -1 at room temperature when N represents an alkaline metal, and with the proviso that Fo does not represent a B 2 O 3 or B 2 O 3 -SiO 2 former system and M a Li 2 O modifier system when D is a composite (LiCl) 2 and Li 2 SO 4 salt.