High lithium ion conductivity solid electrolyte of chromium and aluminum co-doped NASICON-type LiTi2(PO4)3

Zhang, P.; Wang, H.; Qin, Si; Matsui, Masaki; Takeda, Yasuo; Yamamoto, Osamu; Imanishi, Nobuyuki

doi:10.1016/j.ssi.2015.01.004

Cited by 62 publications

(26 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The highest values of conductivity are found in the Al-substituted samples, as expected [52,53]. Considering the different characteristics of the samples reported in the bibliography, in terms of porosity, grain size or sintering procedure, the values of conductivity and activation energy reported in Table 3 are in line with previous works [20,38,51,54].…”

Section: X10 −5supporting

confidence: 88%

Spark plasma versus conventional sintering in the electrical properties of Nasicon-type materials

Peréz-Estébanez

Isasi-Marín

Rivera-Calzada

et al. 2015

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Solid lithium conductors have been attracting a great interest during the last decades due to their potential applications in lithium batteries, sensors and fuel cells [1-9]. Nasicon-type materials were first discovered as three-dimensional ionic conductors and since then many studies have focused on the development of Nasicon materials with optimized properties. LiTi 2 (PO 4) 3 (LTP) and its derivatives are among the best candidates [10-19]. As it has been repeatedly described, the electrical properties of LTP are highly improved by the substitution of Ti 4+ with a trivalent metal giving rise to compounds of formula Li 1+x M x Ti 2−x (PO 4) 3 [10,20-22]. There are two reasons for the improvement of the ionic conductivity: the increase in the concentration of carriers (Li +) and the enhanced density of the powders. In a previous work, we have demonstrated that the concentration of carriers is strongly affecting the ionic conductivity in the way that the displacement of ions from the M1 position to the M2′, gives rise to a higher disorder of ions within the structure [23]. However, apart from the composition, the ionic conductivity of Nasicon materials has also a strong dependence on their density [13,24]. Traditionally, two methods have been used to increase the density of materials: the cold sintering and the melting of the material with a subsequent quenching. As it has been proved, none of these methods succeeded in the fully densification of LTP phases [25,26]. Nasicon compounds are well known to be difficult to densify by the traditional techniques (conventional sintering or hot press) [27]. The Spark Plasma Sintering (SPS) is a pressure assisted sintering method consisting in the application of a pulsed DC current along with uniaxial pressure. SPS allows a faster densification than the conventional sintering methods at lower temperature, giving rise to higher density, smaller grain size, clearer grain boundaries as well as other attractive properties [28]. The critical temperature above which the grain growth rate becomes appreciable is largely determined by the properties of the powder precursors, e. g. their particle size, reactivity, degree of agglomeration, etc., but also by the applied heating rate and pressure [29]. In order to prepare dense samples with a very limited grain growth, it is necessary to Spark plasma versus conventional sintering in the electrical properties of Nasicon-type materials M. Pérez-Estébanez a, d, *

show abstract

Section: X10 −5supporting

confidence: 88%

Spark plasma versus conventional sintering in the electrical properties of Nasicon-type materials

Peréz-Estébanez

Isasi-Marín

Rivera-Calzada

et al. 2015

Journal of Alloys and Compounds

View full text Add to dashboard Cite

show abstract

“…In addition, LTP has proved to be an adaptable material, with use as an effective electrolyte not only in all-solid-state lithium-ion batteries (ASSLBs) [16][17][18], but also in lithium-air [19,20] and lithium-sulfide systems [21]. NASICON-type LiTi2(PO4)3 forms with a rhombohedral structure composed of octahedral TiO6 which corner-share with tetrahedral PO4.…”

Section: Introductionmentioning

confidence: 99%

“…It has been found that Ti 4+ can be replaced by various trivalent elements (such as Al 3+ , Fe 3+ , Y 3+ , Cr 3+ , Ga 3+ and Sc 3+ ) while retaining the rhombohedral NASICON-type structure [17,[26][27][28]. Among these aliovalent substituents, Al 3+ appears to modify the NASICON cell volume towards its optimum size for facile Li + transport and significantly improves the conductivity in so-formed Li1+xAlxTi2-x(PO4)3 (LATP).…”

Section: Introductionmentioning

confidence: 99%

Optimization of sintering process on Li1+Al Ti2-(PO4)3 solid electrolytes for all-solid-state lithium-ion batteries

Yen

Lee²,

Gregory

et al. 2020

Ceramics International

View full text Add to dashboard Cite

In this study, a NASICON-structured Li1.3Al0.3Ti1.7(PO4)3 (LATP) powder is prepared by hydrothermal methods followed by calcination, cold pressing and post-sintering processes. The white, solid product is characterized thoroughly using powder X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) equipped with Energy Dispersive X-ray Spectroscopy (EDS). The conductivity of the material is measured by a impedance spectroscopy as a function of temperature. Initially, hydrothermal synthesis yields a material isostructural with the orthorhombic oxyphosphate, LiTiOPO4. EDS analysis shows that the distribution of aluminum throughout this material is uniform. A systematic study is then performed to investigate how altering the sintering parameters (such as powder pre-sintering temperature and pellet sintering temperature) affect the formation of LATP. The structure is determined by Rietveld refinement against XRD data and the effects of sintering temperature on porosity, microstructure and electrical conductivity were resolved. The experimental results show that the optimum pre-sintering and sintering temperatures of LATP powders and pellets respectively are 900 ℃ and 1100 ℃. These conditions produce materials with the highest density (99.07% of theoretical), superior conductivity (grain-, grain boundary-and total lithium-ion conductivities of 6.5710 -4 , 4.5910 -4 and 2.7010 -4 S cm -1 , respectively) and with an activation energy for Li motion of 0.17 eV.

show abstract

“…This feature in the impedance response indicates that the ions are the predominant charge carriers in this glass-ceramic. Moreover, reported measurements applying Hebb-Wagner method to estimate the electronic conductivity on Cr and Al NASICON-substituted compounds reveal that the electronic contribution is between five to six orders of magnitude lower than their respective ionic conductivity 29 . The impedance response of the LGTP and LCGTP samples show a depressed and distorted semicircle that suggests more than one contribution at high and medium frequencies.…”

Section: Electrical Characterizationmentioning

confidence: 99%

Correlation between Structural Features and Ionic Transport in Lithium-Ion Conducting Glass–Ceramics from the Li_1+xCr_xGeTi_1–x(PO₄)₃ System

et al. 2022

View full text Add to dashboard Cite

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

show abstract

High lithium ion conductivity solid electrolyte of chromium and aluminum co-doped NASICON-type LiTi2(PO4)3

Cited by 62 publications

References 22 publications

Spark plasma versus conventional sintering in the electrical properties of Nasicon-type materials

Spark plasma versus conventional sintering in the electrical properties of Nasicon-type materials

Optimization of sintering process on Li1+Al Ti2-(PO4)3 solid electrolytes for all-solid-state lithium-ion batteries

Correlation between Structural Features and Ionic Transport in Lithium-Ion Conducting Glass–Ceramics from the Li_1+xCr_xGeTi_1–x(PO₄)₃ System

Contact Info

Product

Resources

About

High lithium ion conductivity solid electrolyte of chromium and aluminum co-doped NASICON-type LiTi2(PO4)3

Cited by 62 publications

References 22 publications

Spark plasma versus conventional sintering in the electrical properties of Nasicon-type materials

Spark plasma versus conventional sintering in the electrical properties of Nasicon-type materials

Optimization of sintering process on Li1+Al Ti2-(PO4)3 solid electrolytes for all-solid-state lithium-ion batteries

Correlation between Structural Features and Ionic Transport in Lithium-Ion Conducting Glass–Ceramics from the Li1+xCrxGeTi1–x(PO4)3 System

Contact Info

Product

Resources

About

Correlation between Structural Features and Ionic Transport in Lithium-Ion Conducting Glass–Ceramics from the Li_1+xCr_xGeTi_1–x(PO₄)₃ System