Elaboration of Amorphous-Clay Hybrid: (Al sub( 2)Si sub( 2)O sub( 7).1/2Li sub( 2)O) Designed as a Single Ion Conducting Solid Electrolyte for Li-Ion Batteries

Keying of lithium chloride alkali halide salt into the interlamellar space of nacrite clay mineral leads to a stable hybrid material that after calcination under inert atmosphere at 723 K-873 K induces an amorphous metahybrid. The electrochemical impedance spectroscopy (EIS) was performed to investigate the electric/dielectric properties of the hybrid with various parameters: frequency and temperature. Equivalent circuit was proposed to fit the EIS data. The experiment results show that the ionic conduction mechanism is related to the motion of Li super( +) cations which are thermally activated, named the hopping model. Furthermore, the resulting metahybrid obtained from dehydroxylation of the formal hybrid shows a superionic behavior with high ionic conductivity up to 10 super( -2) S.m super( -1), good electrochemical stability and can be used as a solid electrolyte material for Li-ion batteries.