All-Solid-State Lithium – Air Battery

Professionals say that the lithium – air (L-air) battery has a high mass energy density, which is 5 to 8 times higher than of the ordinary lithium ion battery.
In recent markets, there is much need of powering automobiles, storing excessive electricity generated from the renewable energy sources, and for other purposes, and the battery is increasing its capacity.
AIST designed and manufactured a L-air battery using an inorganic solid material (LAGP = Li1+xGe2-yAlyP3O12) for the electrolyte. Operations of the resultant L-air battery at normal temperature and in atmosphere were confirmed.
Use of the solid electrolyte successfully reduces the voltage difference between charging time and discharging time. The voltage difference is large in the battery using the liquid electrolyte. Where the voltage difference is large, the energy efficiency is poor. The L-ion battery using the organic liquid electrolyte (one of a variation of which is the L-air battery) uses the binder (high polymer material) for fixing electrode material powder to and in the electrode. The binder is easy to react with active oxygen. The inorganic solid electrolyte used eliminates use of the binder. >> More

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