Defect Engineering and Anisotropic Modulation of Ionic Transport in Perovskite Solid Electrolyte LixLa(1−x)/3NbO3
Open Access
- 10 June 2021
- Vol. 26 (12), 3559
- https://doi.org/10.3390/molecules26123559
Abstract
Solid electrolytes, such as perovskite Li3xLa2/1−xTiO3, LixLa(1−x)/3NbO3 and garnet Li7La3Zr2O12 ceramic oxides, have attracted extensive attention in lithium-ion battery research due to their good chemical stability and the improvability of their ionic conductivity with great potential in solid electrolyte battery applications. These solid oxides eliminate safety issues and cycling instability, which are common challenges in the current commercial lithium-ion batteries based on organic liquid electrolytes. However, in practical applications, structural disorders such as point defects and grain boundaries play a dominating role in the ionic transport of these solid electrolytes, where defect engineering to tailor or improve the ionic conductive property is still seldom reported. Here, we demonstrate a defect engineering approach to alter the ionic conductive channels in LixLa(1−x)/3NbO3 (x = 0.1~0.13) electrolytes based on the rearrangements of La sites through a quenching process. The changes in the occupancy and interstitial defects of La ions lead to anisotropic modulation of ionic conductivity with the increase in quenching temperatures. Our trial in this work on the defect engineering of quenched electrolytes will offer opportunities to optimize ionic conductivity and benefit the solid electrolyte battery applications.Keywords
This publication has 40 references indexed in Scilit:
- Rechargeable Li//Br battery: a promising platform for post lithium ion batteriesJournal of Materials Chemistry A, 2014
- Atomic-scale origin of the large grain-boundary resistance in perovskite Li-ion-conducting solid electrolytesEnergy & Environmental Science, 2014
- Domain boundary structures in lanthanum lithium titanatesJournal of Materials Chemistry A, 2013
- Lithium ion transport properties of high conductive tellurium substituted Li7La3Zr2O12 cubic lithium garnetsJournal of Power Sources, 2013
- Lithium Atom and A-Site Vacancy Distributions in Lanthanum Lithium TitanateChemistry of Materials, 2013
- Progress and prospective of solid-state lithium batteriesActa Materialia, 2013
- Superionic Conductivity in Lithium-Rich Anti-PerovskitesJournal of the American Chemical Society, 2012
- Electrolytes for solid-state lithium rechargeable batteries: recent advances and perspectivesChemical Society Reviews, 2011
- Recent progress in solid oxide and lithium ion conducting electrolytes researchIonics, 2006
- High ionic conductivity in lithium lanthanum titanateSolid State Communications, 1993