The Al3+ stabilized phase Li3−3xAlxBO3

Preparation of Li 3 BO 3 –Li 2 SO 4 glass–ceramic electrolytes for all-oxide lithium batteries

“…Li 3 BO 3 eLi 2 SO 4 glasses heat-treated at temperatures just beyond the first crystallization peak, in which metastable phases might be precipitated. The high temperature phase of Li 3 BO 3 was reported to stabilize with the addition of small amounts of aluminum ions [14]; the XRD pattern of Li 2.46 Al 0.18 BO 3 , which possesses the crystal structure at high temperature phase of Li 3 BO 3 , is shown in this figure for comparison. It is apparent that the diffraction patterns of the crystallized Li 3 BO 3 eLi 2 SO 4 are very similar to that of Li 2.46 Al 0.18 BO 3 and there are successive variations in the patterns with the changing Li 2 SO 4 content.…”

“…(B) XRD patterns for the crystallized Li 3 BO 3 eLi 2 SO 4 glasses heat-treated at temperatures just beyond the first crystallization peak in DTA curve. The XRD pattern of Li 2.46 Al 0.18 BO 3 [14] is also shown in this figure for comparison. apparent packing density was calculated by dividing the apparent density of the pellet by the theoretical density of the mixture calculated from the densities of component materials.…”

“…Since then, a variety of this type of mixed-anion or mixed-former glasses as oxide solid electrolytes have been developed by rapid melt quenching and mechanochemical techniques [12,13]. In these lithium ortho-oxosalt pseudobinary systems, the Li 3 BO 3 eLi 2 SO 4 glassy system is very attractive with respect to its low melting properties and possibility of stabilization of superionic high temperature phases; such phases of Li 3 BO 3 and Li 2 SO 4 with high ionic conductivity have been reported [14,15]. So we have been focusing on the Li 3 BO 3 eLi 2 SO 4 glassy materials to evaluate their possibility as an excellent oxide solid electrolyte for the application to allsolid-state battery systems.…”

Mechanochemical synthesis and crystallization of Li₃BO₃–Li₂CO₃ glass electrolytes

“…The bond length of the CO in the CO 3 2¹ anion is 1.28 ¡ 25) and that of BO in the BO 3 3¹ is 1.37 ¡. 19) This is one of the reasons why the peak shift is observed. This result indicates that solid solutions between Li 2 CO 3 and Li 3 BO 3 were formed.…”

Crystal structure determination of new compounds Li6MB3O9(M=Nd,Sm,Eu,Tm,Er)

“…Therefore, it is necessary to explore new ionic conducting materials with better properties, and as a result solid lithium superionic conductors based on inorganic borates have been investigated. Wu et al (2004) reported a new compound Li 4 CaB 2 O 6 with Li + -ion conductivity 10 −4 Scm −1 at room temperature; He et al (2005) obtained another new compound 0.66Li 2 O⋅0.06Al 2 O 3 ⋅0.28B 2 O 3 with Li + -ion conductivity 6×10 −4 Scm −1 at 300 °C.…”