TITLE:
Elaboration of Amorphous-Clay Hybrid: (Al2Si2O7·1/2Li2O) Designed as a Single Ion Conducting Solid Electrolyte for Li-Ion Batteries
AUTHORS:
Nouha Jaafar, Sonia Naamen, Hafsia Ben Rhaiem, Abdesslem Ben Haj Amara
KEYWORDS:
Nacrite, Clay, Hybrid, Amorphous, Solid Electrolyte, Lithium-Ion Battery
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.5 No.17,
December
25,
2014
ABSTRACT: 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 - 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+ 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 10﹣2 S·m﹣1, good electrochemical stability and can be used as a solid electrolyte material for Li-ion batteries.