Lithium Lanthanum Titanates: A Review

Stramare, S.; Thangadurai, Venkataraman; Weppner, W.

doi:10.1002/chin.200352244

Cited by 98 publications

(166 citation statements)

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“…However, the two-dimensional lithium ion paths in this material are interrupted by grain boundaries, resulting in a high Rgb with σgrain boundary ≈ σtotal = 2 × 10 −5 Scm −1 (Inaguma et al, 1993;Stramare et al, 2003; et al, 2005;Gao et al, 2014;Moriwake et al, 2015). In contrast, the grain boundary resistance of garnet-like oxides is relatively low compared to other ion-conducting oxides because of the good lithium ion connection between grains, forming three dimensional lithium ion paths.…”

mentioning

confidence: 91%

Grain Boundary Analysis of the Garnet-Like Oxides Li7+X−YLa3−XAXZr2−YNbYO12 (A = Sr or Ca)

2016

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Garnet-like oxides having the formula Li7+X−YLa3−XAXZr2−YNbYO12 (A = Sr or Ca) were synthesized using a solid-state reaction, and their bulk and grain boundary resistivities were assessed by AC impedance measurements. A difference in grain boundary resistivity was identified between Sr and Ca materials, and so the grain boundaries were examined using electron probe microanalysis (EPMA). The difference in the grain boundary resistivities was attributed to the core-shell structure of the Sr-substituted samples. In contrast, the Ca-substituted materials exhibited accumulations of impurities at the grain boundaries.

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confidence: 91%

Grain Boundary Analysis of the Garnet-Like Oxides Li7+X−YLa3−XAXZr2−YNbYO12 (A = Sr or Ca)

2016

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“…Several compounds have been identified as interesting inorganic solid state electrolytes for lithium ion conduction [4]. Among them, perovskite-type lithium lanthanum titanates (LLTO) [5,6], garnet-related oxides [7], lithium phosphorus oxynitride (LiPON) [8], sulphides ceramics and glass-ceramics [9,10], as well as NASICON-type aluminium-doped lithium titanium phosphate (LATP) [11][12][13], have been the subject of much research in recent years. The latter, with an optimized composition of Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 , is water stable and exhibits a conductivity of 7 x 10 4 S.cm -1 at ambient temperature and a theoretical Ohmic resistance of 14 .cm² for a 100 mthick electrolyte [11].…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted reactive sintering and lithium ion conductivity of Li1.3Al0.3Ti1.7(PO4)3 solid electrolyte

Hallopeau

Brégiroux

Rousse

et al. 2018

Journal of Power Sources

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Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) materials are made of a threedimensional framework of TiO 6 octahedra and PO 4 tetrahedra, which provides several positions for Li + ions. The resulting high ionic conductivity is promising to yield electrolytes for all-solid-state Li-ion batteries. In order to elaborate dense ceramics, conventional sintering methods often use high temperature ( 1000°C) with long dwelling times (several hours) to achieve high relative density ( 90%).In this work, an innovative synthesis and processing approach is proposed. A fast and easy processing technique called microwave-assisted reactive sintering is used to both synthesize and sinter LATP ceramics with suitable properties in one single step. Pure and crystalline LATP ceramics can be achieved in only 10 min at 890 °C starting from amorphous, compacted LATP's precursors powders. Despite a relative density of 88%, the ionic conductivity measured at ambient temperature (3.15 x 10 -4 S.cm -1 ) is among the best reported so far. The study of the activation energy for Li + conduction confirms the high quality of the ceramic (purity and crystallinity) achieved by using this new approach, thus emphasizing its interest for making ion-conducting ceramics in a simple and fast way.

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“…However, until recently, known solid electrolytes, such as the garnet Li 7 La 3 Zr 2 O 12 and the perovskite Li 3x La 2/3 − x TiO 3 (0 ⩽ x ⩽ 0.16), have Li + conductivities that are at least 1-2 orders of magnitude lower compared with those of organic liquid electrolytes. 20,21 The discovery of the Li 10 GeP 2 S 12 superionic conductor by Kamaya et al 22 in 2011, with the highest ever reported Li + conductivity of 12 mS cm − 1 , has provided renewed hope for the development of solid ceramic electrolytes with comparable transport properties with flammable organic electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Computational studies of solid-state alkali conduction in rechargeable alkali-ion batteries

Deng

Ong

2016

NPG Asia Mater

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The facile conduction of alkali ions in a crystal host is of crucial importance in rechargeable alkali-ion batteries, the dominant form of energy storage today. In this review, we provide a comprehensive survey of computational approaches to study solid-state alkali diffusion. We demonstrate how these methods have provided useful insights into the design of materials that form the main components of a rechargeable alkali-ion battery, namely the electrodes, superionic conductor solid electrolytes and interfaces. We will also provide a perspective on future challenges and directions. The scope of this review includes the monovalent lithium-and sodium-ion chemistries that are currently of the most commercial interest. NPG Asia Materials (2016) 8, e254; doi:10.1038/am.2016.7; published online 25 March 2016 INTRODUCTIONThe facile conduction of alkali ions in a crystal is of critical importance in energy storage. Today, the dominant form of energy storage in consumer electronics is the rechargeable lithium-ion (Li-ion) battery, 1-5 a device that functions entirely on the basis of the reversible transport of Li + ions. With one of the highest energy densities of known energy storage technologies, Li-ion batteries are finding increasingly large-scale applications in electrified transportation and grid storage. In recent years, there has also been a resurgence of interest in rechargeable sodium-ion (Na-ion) batteries, 6-12 which function on the same basic principle but with Na + instead of Li + because of concerns regarding the abundance and cost of lithium. Figure 1 shows a representation of a rechargeable alkali-ion battery. The typical electrode in an alkali-ion battery is an intercalation compound, which, as the name implies, stores alkali ions by inserting them into its crystal structure in a topotactic manner. During discharge, A + ions are transported from the anode, through the electrolyte and into the cathode. The reverse happens during charge. Throughout this review, we will adopt the customary terminology of defining the 'cathode' as the positive electrode during discharge, even though the formal definition of the cathode changes depending on whether the charging or discharging process is being referred to. Current cathodes are typically transition metal oxides, and the insertion/removal of each A + in the cathode is accompanied by the concomitant reduction/oxidation of a transition metal ion to accommodate the compensating insertion/removal of an electron. Graphitic carbon is the most common anode.The performance of a rechargeable alkali-ion battery depends crucially on the ease with which alkali ions move in the host crystal of the cathode and anode, in the electrolyte, and in the electrodeelectrolyte interface. Poor alkali transport in any part of the battery

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Lithium Lanthanum Titanates: A Review

Abstract: Inorganic chemistryInorganic chemistry Z 0100 Lithium Lanthanum Titanates: A Review -[155 refs.]. -(STRAMARE, S.; THANGADURAI*, V.; WEPPNER, W.; Chem. Mater. 15 (2003) 21, 3974-3990;

Cited by 98 publications

References 1 publication

Grain Boundary Analysis of the Garnet-Like Oxides Li7+X−YLa3−XAXZr2−YNbYO12 (A = Sr or Ca)

Grain Boundary Analysis of the Garnet-Like Oxides Li7+X−YLa3−XAXZr2−YNbYO12 (A = Sr or Ca)

Microwave-assisted reactive sintering and lithium ion conductivity of Li1.3Al0.3Ti1.7(PO4)3 solid electrolyte

Computational studies of solid-state alkali conduction in rechargeable alkali-ion batteries

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