The lithium-ion-conducting ceramic composite based on LiTi2(PO4)3 with addition of LiF

Kwatek, K.; Nowiński, J.L.

doi:10.1007/s11581-018-2584-5

Cited by 13 publications

(15 citation statements)

References 44 publications

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“…However after sintering of composite, additional reflections appeared at 17.0°, 18.5°, 20.4°, 22.2°, 27.0°, 27.3°, 27.7°, 31.0° and 39.3°. They were identified as LiTiPO5 and Li4P2O7 phases [8,11,24,[27][28][29]33]. As evidenced by HTXRD studies, the most pronounced changes in phase composition could be observed above 700°C.…”

Section: X-ray Diffractionmentioning

confidence: 92%

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Impact of Li2.9B0.9S0.1O3.1 glass additive on the structure and electrical properties of the LATP-based ceramics

Kwatek

Ślubowska

Trébosc

et al. 2020

Journal of Alloys and Compounds

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The existing solid electrolytes for lithium ion batteries suffer from low total ionic conductivity, which restricts its usefulness for the lithium-ion battery technology. Among them, the NASICON-based materials, such as Li1.3Al0.3Ti1.7(PO4)3 (LATP) exhibit low total ionic conductivity due to highly resistant grain boundary phase. One of the possible approaches to efficiently enhance their total ionic conductivity is the formation of a composite material. Herein, the Li2.9B0.9S0.1O3.1 glass, called LBSO hereafter, was chosen as an additive material to improve the ionic properties of the ceramic Li1.3Al0.3Ti1.7(PO4)3 base material. The properties of this Li1.3Al0.3Ti1.7(PO4)3-xLi2.9B0.9S0.1O3.1 (0  x  0.3) system have been studied by means of high temperature X-ray diffractometry (HTXRD), 7 Li, 11 B, 27 Al and 31 P magic angle spinning nuclear magnetic resonance spectroscopy (MAS NMR), thermogravimetry (TG), scanning electron microscopy (SEM), impedance spectroscopy (IS) and density methods. We show here that the introduction of the foreign LBSO phase enhances their electric properties. This study reveals several interesting correlations between the apparent density, the microstructure, the composition, the sintering temperature and the ionic conductivity. Moreover, the electrical properties of the composites will be discussed in the terms of the bricklayer model (BLM). The highest value of σtot = 1.5 × 10 −4 S•cm −1 has been obtained for LATP-0.1LBSO material sintered at 800°C.

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Section: X-ray Diffractionmentioning

confidence: 92%

“…Therefore, to obtain highly conductive material, another approach has been proposed. It is based on the addition of some foreign phase into the base matrix in order to lower the grain boundary resistance [24][25][26][27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Impact of Li2.9B0.9S0.1O3.1 glass additive on the structure and electrical properties of the LATP-based ceramics

Kwatek

Ślubowska

Trébosc

et al. 2020

Journal of Alloys and Compounds

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“…In the NASICON-type structure, TiO 6 octahedra and PO 4 tetrahedra are linked by their corners to form a 3D stable network [5][6][7][8]. However, its total ionic conductivity is still low because of highly resistive grain boundaries and low sinterability [8][9][10][11][12][13][14][15]. To address that issues, the partial replacement of Ti 4+ ions by trivalent Al 3+ ions was adopted as a way to improve sinterability and enhance the ionic conductivity.…”

Section: Introductionmentioning

confidence: 99%

Electrical and Structural Properties of Li1.3Al0.3Ti1.7(PO4)3—Based Ceramics Prepared with the Addition of Li4SiO4

et al. 2021

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The currently studied materials considered as potential candidates to be solid electrolytes for Li-ion batteries usually suffer from low total ionic conductivity. One of them, the NASICON-type ceramic of the chemical formula Li1.3Al0.3Ti1.7(PO4)3, seems to be an appropriate material for the modification of its electrical properties due to its high bulk ionic conductivity of the order of 10−3 S∙cm−1. For this purpose, we propose an approach concerning modifying the grain boundary composition towards the higher conducting one. To achieve this goal, Li4SiO4 was selected and added to the LATP base matrix to support Li+ diffusion between the grains. The properties of the Li1.3Al0.3Ti1.7(PO4)3−xLi4SiO4 (0.02 ≤ x ≤ 0.1) system were studied by means of high-temperature X-ray diffractometry (HTXRD); 6Li, 27Al, 29Si, and 31P magic angle spinning nuclear magnetic resonance spectroscopy (MAS NMR); thermogravimetry (TG); scanning electron microscopy (SEM); and impedance spectroscopy (IS) techniques. Referring to the experimental results, the Li4SiO4 additive material leads to the improvement of the electrical properties and the value of the total ionic conductivity exceeds 10−4 S∙cm−1 in most studied cases. The factors affecting the enhancement of the total ionic conductivity are discussed. The highest value of σtot = 1.4 × 10−4 S∙cm−1 has been obtained for LATP–0.1LSO material sintered at 1000 °C for 6 h.

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“…Infiltration of LATP with ionic liquid (IL) increases the ionic conductivity, and the interaction between grain boundary and IL was held responsible for that [28]. Also, LiPO 3 and Li 2 SO 4 [29], Li 2.9 B 0.9 S 0.1 O 3.1 [30], and LiF [31] aid in increasing ionic conductivity.…”

Section: Introduction mentioning

confidence: 99%

Combined quantitative microscopy on the microstructure and phase evolution in Li1.3Al0.3Ti1.7(PO4)3 ceramics

Gunduz

Schierholz

et al. 2020

J Adv Ceram

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Lithium aluminum titanium phosphate (LATP) is one of the materials under consideration as an electrolyte in future all-solid-state lithium-ion batteries. In ceramic processing, the presence of secondary phases and porosity play an important role. In a presence of more than one secondary phase and pores, image analysis must tackle the difficulties about distinguishing between these microstructural features. In this study, we study the phase evolution of LATP ceramics sintered at temperatures between 950 and 1100 ℃ by image segmentation based on energy-dispersive X-ray spectroscopy (EDS) elemental maps combined with quantitative analysis of LATP grains. We found aluminum phosphate (AlPO 4) and another phosphate phase ((Li x)P y O z). The amount of these phases changes with sintering temperature. First, since the grains act as an aluminum source for AlPO 4 formation, the aluminum content in the LATP grains decreases. Second, the amount of secondary phase changes from more (Li x)P y O z at 950 ℃ to mainly AlPO 4 at 1100 ℃ sintering temperature. We also used scanning electron microscopy (SEM) and confocal laser scanning microscopy (CLSM) to study the evolution of the LATP grains and AlPO 4 , and LATP grain size increases with sintering temperature. In addition, transmission electron microscopy (TEM) was used for the determination of grain boundary width and to identify the amorphous structure of AlPO 4 .

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The lithium-ion-conducting ceramic composite based on LiTi2(PO4)3 with addition of LiF

Cited by 13 publications

References 44 publications

Impact of Li2.9B0.9S0.1O3.1 glass additive on the structure and electrical properties of the LATP-based ceramics

Impact of Li2.9B0.9S0.1O3.1 glass additive on the structure and electrical properties of the LATP-based ceramics

Electrical and Structural Properties of Li1.3Al0.3Ti1.7(PO4)3—Based Ceramics Prepared with the Addition of Li4SiO4

Combined quantitative microscopy on the microstructure and phase evolution in Li1.3Al0.3Ti1.7(PO4)3 ceramics

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