Improved conductivity in tape casted Li-NASICON supported thick films: Effect of temperature treatments and lamination

Jiménez, Ricardo; Campo, Adolfo del; Calzada, M. L.; Sanz, J.; Kobylianska, S.D.; Liniova, B.O.; Белоус, А. Г.; Ragulya, A. V.

doi:10.1016/j.jeurceramsoc.2017.12.017

Cited by 18 publications

(11 citation statements)

References 33 publications

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“…[72,73] To obtain pure phase and high ion conduction, these synthetic parameters (precursors, solvents, and temperatures) need to be well controlled. [69] The Pechinip rocess, am odified sol-gel method, is defined by the introduction of an alpha-hydroxycarboxylic acid, such as citric acid, to the mixed precursors in aqueouss olution, [75][76][77][78] which results in chelationo ft he solution, that is, al arge and cross-linked network is formed. [72] JimØneze tal.…”

Section: Sol-gel Methodsmentioning

confidence: 99%

“…The sol-gel methodo ffers an efficient synthetic path for crystalline LATP and LAGP solid electrolytes by using as olvent intermediate step to form acolloidal solution and then agel network, followed by heat treatmentf or crystallization ( Figure 2). [69][70][71][72][73][74][75][76][77][78] With the sol-gel method, it is possible to obtainp ure materials at lower heat-treatment temperatures and shorter times relative to those of solid-states ynthesis and the melt-quenching method. In addition, the sol-gel method Figure 1.…”

Section: Sol-gel Methodsmentioning

confidence: 99%

“…reported that as lower heating process and lamination step were beneficial for conductivity enhancementf or sol-gel-synthesizedL ATP (Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 )n anopowder. [69] The Pechinip rocess, am odified sol-gel method, is defined by the introduction of an alpha-hydroxycarboxylic acid, such as citric acid, to the mixed precursors in aqueouss olution, [75][76][77][78] which results in chelationo ft he solution, that is, al arge and cross-linked network is formed. After polymerization and decomposition in subsequent heat-treatment processes,n anosized LATP or LAGP particles are obtained, typically 20-50 nm.…”

Section: Sol-gel Methodsmentioning

confidence: 99%

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Synthesis and Properties of NaSICON‐type LATP and LAGP Solid Electrolytes

2019

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Inorganic solid electrolytes, in comparison with their liquid counterparts, have more potential in varioust ypes of batteries due to their dual roles of ion transportation and separation. For all-solid-state batteries, solide lectrolytes bring several advantages, [1][2][3][4][5][6] such as enhanced safety,i ncreased energy density,s olid device integration, and packaging;t hese expand the operation temperature range and potentially improve cycling stabilitya nd lifetime. Moreover,i norganic solid electrolytes are also beneficial for lithium-ion batteries and lithium-air batteries, in which they functiona se ither surface modification layers or lithium-ion conductors. [7,8] In principle, ideal solid electrolytes are expected to have several features: [9][10][11][12][13][14] 1) fast ion dynamics and negligible electronic conductivity (minimum ionic conductivity of 10 À4 Scm À1 at room temperature for practical consideration);2 )a wide electrochemical potential window for battery cycling;3 )ane xceptional mechanical strength to suppress lithium dendrite growth;4 )excellent thermal stability during the cycling processes;and 5) asimple and low cost synthetic process for large-scale applications.Generally,i norganic lithium superionic conductors are divided into three categories:o xides, sulfides, and phosphates. Suc-cessfule xamples in oxidesi nclude garnet oxides, [15,16] perovskite-type oxides, [17,18] and antiperovskite oxides. [19][20][21] Sulfide solid electrolytes include Li 2 SÀP 2 S 5 , [22,23] Li 3 PS 4 , [24][25][26] Li 7 P 3 S 11 , [27,28] Li 7 PS 6 ,a nd Li 6 PS 5 X( X = Cl, Br). [29][30][31] Popular phosphate solid electrolytes include sodium superionic conductor (NaSICON)structured lithium-ion conductors, [32][33][34][35][36] such as LiTi 2 (PO 4 ) 3 (LTP), Li 1 + x Al x Ti 2Àx (PO 4 ) 3 (LATP), and Li 1 + x Al x Ge 2Àx (PO 4 ) 3 (LAGP). Many exciting discoveries of these materials have been summarized in important review papers. [2,6,[37][38][39][40] NaSICON-type solid electrolytes, such as LATP and LAGP, have marked advantages compared with sulfides and oxides: they display chemicals tabilityi na ir and/or water,a re low cost and low toxicity,a nd have great electrochemical stability with the added benefito fe asy preparation. [2,36,38] They also exhibit attractive ionic conductivities of 10 À4 -10 À3 Scm À1 at room temperature. Such features have recently caused renewed interest in these NaSICON-structured materials and much effort has been devoted to the investigation of this type of solid electrolyte, especiallyL ATPa nd LAGP.T his manuscript reviewsr ecent progress in LATP and LAGP solid electrolytes, with as pecific focus on synthetic approaches and their effects on the crystal structures, conductive properties, and applications. Herein, general synthetic methods for LATP and LAGP solid electrolytes are first introduced, followed by ac omparison of the crystal structures, phase purities, and ionic conductivities that result from different approaches. Later,t he applications of LATP and LAGP in ful...

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Section: Sol-gel Methodsmentioning

confidence: 99%

Section: Sol-gel Methodsmentioning

confidence: 99%

Section: Sol-gel Methodsmentioning

confidence: 99%

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Synthesis and Properties of NaSICON‐type LATP and LAGP Solid Electrolytes

2019

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“…Third, while the lower modulus of sulfide electrolytes might enable very thin, large area sheets of these materials to better withstand the rigors of large scale manufacturing 85,86 , higher modulus oxide sheets might be more prone to failure under the requisite large scale handling and processing conditions. Thin, large area, tape cast sheets are well known to warp, crack, shrink, and delaminate upon heating, particularly when the slurry composition and its processing conditions are not properly optimized [84][85][86][87][88][89][90][91][92][93][94][95][96][97][98] , making higher modulus oxide sheets especially vulnerable to failure during their required high temperature sintering. The consequences of this disparity in mechanical properties is not trivial.…”

Section: Materials and Processingmentioning

confidence: 99%

Manufacturing scalability implications of materials choice in inorganic solid-state batteries

Huang

Ceder

Olivetti

2021

Joule

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The pursuit of scalable and manufacturable all-solid-state batteries continues to intensify, motivated by the rapidly increasing demand for safe, dense electrical energy storage. In this Perspective, we describe the numerous, often conflicting, implications of materials choices that have been made in the search for effective mitigations to the interfacial instabilities plaguing solid-state batteries. Specifically, we show that the manufacturing scalability of solid-state batteries can be governed by at least three principal consequences of materials selection: (1) the availability, scaling capacity, and price volatility of the chosen materials' constituents, (2) the manufacturing processes needed to integrate the chosen materials into full cells, and (3) the cell performance that may be practically achieved with the chosen materials and processes. While each of these factors is, in isolation, a pivotal determinant of manufacturing scalability, we show that consideration and optimization of their collective effects and tradeoffs is necessary to more completely chart a scalable pathway to manufacturing. Context & Scale With examples pulled from recent developments in solid-state batteries, we illustrate the consequences of materials choice on materials availability, processing requirements and challenges, and resultant device performance. We demonstrate that while each of these factors is, by itself, essential to understanding manufacturing scalability, joint consideration of all three provides for a more comprehensive understanding of the specific factors that could impede the scale up to production. Much of the recent activity in solidstate battery research has been aimed at mitigating the various interfacial instabilities that currently prevent the fabrication of a low cost, high performance device. With such a wide breadth of options, it can be difficult for researchers to identify the most promising or scalable pathways forward. As such, we aim to empower researchers to make more informed decisions by providing them with insights into how their materials choices are likely to impact the manufacturing scalability of different interfacial mitigation alternatives. In doing so, we hope that generalizable lessons about scalability can be extracted and applied to subsequent challenges in solid-state battery development, thereby accelerating their scale up to manufacturing.

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“…As indicated previously, the relevant information concerning the secondary phases can be obtained using the confocal RAMAN sweeps. The RAMAN technique is sensitive to both crystalline and amorphous phases, which makes this technique suitable for the investigation of amorphous secondary phases in the supported Li-NASICON thick films [23,24]. Another advantage of this technique is spatial resolution in the distribution study of secondary phases, which is crucial for the understanding of the physical properties.…”

Section: Confocal Raman Characterizationmentioning

confidence: 99%

Preparation and Characterization of Large Area Li-NASICON Electrolyte Thick Films

et al. 2019

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The preparation of solid electrolyte ceramic membranes is the object of intense study for its fundamental parts in the development of all solid-state batteries and improved battery separators. In this work, the procurement of large area solid electrolyte ceramic thick film membranes of the Li-NASICON Li1.3Al0.3Ti1.7(PO4)3 (LATP) composition is attempted. Through the use of LATP powders from a sol–gel reaction, a slurry is formulated and tape casted. The green tapes are sintered using two sintering times. In both cases, ceramic thick films of a 5.5 × 5.5 cm2 area and 250 µm average thickness were obtained. The characterization indicated almost pure phase samples with a bi-modal microstructure composed of large and smaller grains, being larger for longer sintering time. The samples are porous and brittle, presenting very high “bulk” conductivity but lower total direct current (DC) one, as compared with the commercial Li-NASICON (OHARA) thick films with a similar area. The larger the grains, the poorer the total conductivity and the mechanical properties of the thick-films. The formation of poorly adhering grain boundaries as the grain size grows is responsible for the worsened properties. A better control of the microstructure is mandatory.

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Improved conductivity in tape casted Li-NASICON supported thick films: Effect of temperature treatments and lamination

Cited by 18 publications

References 33 publications

Synthesis and Properties of NaSICON‐type LATP and LAGP Solid Electrolytes

Synthesis and Properties of NaSICON‐type LATP and LAGP Solid Electrolytes

Manufacturing scalability implications of materials choice in inorganic solid-state batteries

Preparation and Characterization of Large Area Li-NASICON Electrolyte Thick Films

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