Nitrogen-free sol–gel synthesis of Al-substituted cubic garnet Li7La3Zr2O12 (LLZO)

Low-temperature densification of Al-doped Li7La3Zr2O12: a reliable and controllable synthesis of fast-ion conducting garnets

“…13 The successful preparation of fast-ion conducting phases, however, oen requires the use of elevated temperatures ($1200 C) and, in several cases, the use of alumina crucibles which provide a source of additional dopant. Al-Doped phases produced at lower calcination temperatures (700-1100 C) typically lack phase purity and/or sufficient Li + conductivity, 14,15 and oen require elaborate densication procedures. 11,16,17 The difficulty in developing an alternative approach to produce fast-ion conducting Al-doped LLZO phases arises from the fact that the formation and the densication of the material are correlated.…”

“…20,21 DFT calculations, however, also indicate that the 24d site is energetically favorable for Al 3+ over the 96h position; 22 moreover, they give evidence that Al 3+ could occupy the octahedral 48g sites. 20 Neutron powder diffraction (NPD) studies, on the other hand, have located Al 3+ at the 24d sites 6,13,14,23 or, in one report, at the 48g sites. 24 The site preference of Al 3+ is expected to have a signicant inuence on the transport properties of LLZO since the 24d sites joint the loops of the Li + pathways in LLZO.…”

A gel single ion conducting polymer electrolyte enables durable and safe lithium ion batteries via graft polymerization

“…9,15 Among them, ceramic electrolyte with high ionic conductivity at room temperature have captured much attention. [16][17][18] However, the large interfacial resistance arising from the poor interfacial compatibility between the rigid ceramic and electrode materials cannot be completely solved in a short time, [19][20][21][22] which makes it difficult to be applied in lithium ion batteries on a large scale. On the contrary, solid-state SIPE possesses the advantages of lighter weight and higher exibility compared to the ceramic electrolytes, which is regarded as a better candidate.…”

Insights into degradation of metallic lithium electrodes protected by a bilayer solid electrolyte based on aluminium substituted lithium lanthanum titanate in lithium-air batteries

“…[23][24][25][26] Fewer reports have been presented on solid electrolytes 27-31 than on the modification of liquid electrolytes [16][17][18][19][20][32][33][34][35][36] to improve the anode in Li-air batteries. In addition, until now, most studies on solid electrolytes have focused on enhancing the ionic conductivity electrolytes, 25,[37][38][39] and the solid electrolytes used in Li-air batteries have been generally separated from the Li electrode by a separator or polymer electrolyte. 27,40,41 In addition, some reports have been presented that refer to the structural investigation of a single Li electrode.…”