High conductive yttrium doped Li7La3Zr2O12 cubic lithium garnet

Reversible ion exchange and structural stability of garnet-type Nb-doped Li7La3Zr2O12 in water for applications in lithium batteries

“…It was found that the cubic garnet phase was maintained for all the samples even though the ion exchange level of S4 was up to 74.8%. This revealed that the framework of La 3 Nb 0.25 Zr 1.75 O 12 6.75À was stable enough for Li þ /H þ ion exchange and the cubic phase was a stable crystal structure for garnet-type Li 6.75Àx H x La 3 Nb 0.25 Zr 1.75 O 12 at room temperature. Similar results were reported for hydrated LLZ by Larraz et al [29].…”

W-Doped Li7La3Zr2O12 Ceramic Electrolytes for Solid State Li-ion Batteries

“…Isolated pores formed during sintering process inside grains or along the grain boundaries may lead to a large internal resistance. Previous studies indicated that elemental doping was an effective means to stabilize the cubic phase as well as increase the density of ceramic samples, especially with Al, Y, Ga doping [12][13][14][15][16]. These dopants can not only substitute the corresponding element in the lattice but also help expel pores through low melting-point phase formed at grain boundaries, which leads to good connection between the cubic grains.…”

Li+ transport properties of W substituted Li7La3Zr2O12 cubic lithium garnets

“…16 However the Li 7 lower sintering temperature around 950 • C. 16 The synthesis, structural and electrical conductivity of Ta, Nb, Al, Ga, Si, Y substituted cubic phase LLZ have also been reported. [17][18][19][20][21][22][23][24][25][26] Although there are several reports on synthesis, structure and ionic conductivity a detailed investigation on understanding the Li + dynamics through impedance spectroscopy is scarce. For further understanding of the Li + dynamics in lithium garnets and the effect of tungsten (W) substitution on Li + transport properties of LLZ a detailed impedance spectroscopic investigation has been carried out in the present work on Li 7 3 (Sigma -Aldrich, 99 %).…”