Mechanochemical synthesis and crystallization of Li3BO3-Li2CO3 glass electrolytes

Abstract

Oxide Li3BO3-Li2CO3 glasses were synthesized by a mechanochemical technique. The glasses were heat treated to obtain the glass-ceramics. Raman spectra indicated that these glasses were composed of ortho-borate, carbonate and lithium ions. After milling, a solid solution based on Li2CO3 was obtained at the 20Li3BO3·80Li2CO3 composition. By heating the milled sample at 500°C, the crystallinity and conductivity increased. This heated sample showed the conductivity of 1.2 × 10-6 S cm-1 at room temperature, which is eight orders of magnitude higher than that of Li2CO3 crystal.