H+/Li+ exchange property of Li3XLa2/3−XTiO3 in water and in humid atmosphere

High lithium ion conductivity solid electrolyte of chromium and aluminum co-doped NASICON-type LiTi2(PO4)3

“…The grain boundary resistance of Li 1.4 Al 0.3 Cr 0.1 Ti(PO 4 ) 3 was increased significantly from 29.1 to 990.2 Ω·cm 2 by immersion in distilled water, while the bulk resistance was increased slightly from 49.3 to 58.3 Ω·cm 2 . The increases in grain boundary resistance could be explained by the ion exchange of Li + and H + observed in Li 3x La 2/3 TiO 3 [24] and Li 7 La 3 Sn 2 O 12 [25]. The mechanical strength of the pellet was also reduced by immersion in distilled water at 50°C for one month.…”

Mechanical Properties of Hot Isostatically Pressed Li0.35La0.55TiO3

“…This phase is differentiated from the cubic phase in that Li þ and La 3þ cations preferentially order into alternating layers of the perovskite A-site whereas they remain randomly distributed in the cubic phase. [15][16][17] The measured densities of eight HIP LLTO samples are given in Table 1. All values fall within 0.07 g cm À3 of each other, and their average is 4.942 g cm À3 .…”

Mixed Electronic and Ionic Conduction Properties of Lithium Lanthanum Titanate

“…It is known that ordering of the La atoms at high temperatures within the lattice can result in a tetragonal distortion. [22,54] Therefore, in order to achieve cubic LLTO without modifying the composition, the LLTO is cooled at a relatively rapid rate of ≈35 °C min −1 , which should be sufficiently fast to achieve primarily cubic LLTO, despite the presence of tetragonal phase LLTO in the as-received powder. [55] The resulting billets were then cut into pellets with a diamond saw and polished with a variety of sandpapers and diamond pastes, beginning at a 1200 grit sandpaper and ending with a final polish using a 0.5 µm diamond paste and a mineral-oil based polishing fluid (Leco, St. Joseph, MI).…”