The present invention discloses a new glassy electrolyte for Li (Lithium) ions conduction. The electrolyte presents two essential properties: it is a superionic conductor of Li ions and an electrical insulator. It can be used between the negative (including Li-metal) and positive electrodes of a lithium battery. The glass is anti-flammable, light, recyclable, easily synthesizable and costless. It can be used in high voltage batteries.
Three types of next generation batteries are currently being envisaged among the international community: metal-air batteries, multivalent cation batteries and allsolid- state battery concepts. These 3 battery designs require high-performance, safe and cost effective electrolytes that are compatible with optimized electrode materials. Solid electrolytes have not yet been extensively employed in commercial batteries as they suffer poor ionic conduction at acceptable temperatures and insufficient stability with respect to lithium-metal.
The technology relates to a novel type of glasses, which evolve from an antiperovskite structure and that shows the highest ionic conductivity ever reported for Li-ion (25mScm-1 at 25 ºC). These glassy electrolytes for lithium batteries are inexpensive, light, recyclable, nonflammable and non-toxic. Moreover, in the case of lithium, they present a wide electrochemical window (higher than 8 V) and thermal stability within the application range of temperatures.