Interface modification of NASICON-type Li-ion conducting ceramic electrolytes: a critical evaluation

Abstract

This review article focuses on methods to solve a critical issue of reduction in NASICON-type solid electrolytes such as Li1+xAlxTi2-x(PO4)3 and Li1+xAlxGe2-x(PO4)3 by Li metal. The formation of reduced phase...

Deciphering the dual functions of a silicon dioxide protective layer in regulating lithium-ion deposition

“…3 Gigantic efforts have been devoted to overcoming these chronic problems associated with Li metal anodes. [4][5][6][7] Among various strategies, building a protective layer is considered to be a promising way to suppress Li dendrite growth and improve the CE and cycling stability. [8][9][10][11] Until now, various types of materials, such as ceramic metal oxides, 12 lithium compounds, 13 and polymers, 14 have been shown to form efficient protective layers on Li metal.…”

Polycationic doping of the LATP ceramic electrolyte for Li-ion batteries

“…Apparently, much larger Ca 2+ and Sr 2+ cations introduce a significant amount of microstrain in the crystal lattice, therefore causing various defects at the macro level while leaving local crystallinity the same, thus non-prominent on the XRD patterns. 36 The defects caused by this mismatch result in the less crystalline surface and likely in a lower potential barrier for Ti 4+ reduction. More size-similar ions like Mg 2+ , Zr 4+ , Hf 4+ do not have such an effect on the Ti 4+ reduction tolerance and, therefore, can be further studied.…”

Effect of a layer-by-layer assembled ultra-thin film on the solid electrolyte and Li interface

“…The thickness of these interlayers were from 10 to 100 micron and usually a thick film negatively affects charge transfer capability, creating additional barriers for lithium ion migration. Overall, the up to date status of various interlayers LATP and LAGP with the results of Li stripping and plating performance duration is depicted in Figure 2 [79]. [79] It can be clearly seen that the interlayers designed from inorganic substances only operate at very low current densities, while the polymers showed very stable performance at higher current densities.…”

“…Overall, the up to date status of various interlayers LATP and LAGP with the results of Li stripping and plating performance duration is depicted in Figure 2 [79]. [79] It can be clearly seen that the interlayers designed from inorganic substances only operate at very low current densities, while the polymers showed very stable performance at higher current densities. It can be concluded from Figure 2 that the further developments on solid electrolyte and Li metal interface is preferable to be carried out by utilizing artificial interlayers made of lithium ion conducting polymer materials [79].…”

“…The most recent studies addressing this problem include deposition of artificial layers based on inorganic substances such as oxides, lithium salts, nanocomposites and other types of lithium conducting solid materials. 79 Liu et al introduced Al 2 O 3 and Li 3 PO 4 materials as interface stabilizers using atomic layer deposition (ALD), while Bai et al suggested depositing an Al 2 O 3 doped ZnO layer on LATP using a magnetron sputtering tool. 42,60 Cheng et al protected LATP by depositing boron nitride nanocomposites via chemical vapor deposition (CVD).…”