Synthesis and Characterization of LAGP-Based Lithium Ion-Conductive Composites with an LLTO Additive

Feng-xuan, Song; Yamamoto, Takayuki; Yabutsuka, Takeshi; Yao, Takeshi; Takai, Shigeomi

doi:10.1016/j.jallcom.2020.157089

Cited by 9 publications

(3 citation statements)

References 41 publications

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“…The small amount of B 2 O 3 decreased the crystallization temperature of LAGP pellets and increased the total ionic conductivity of LAGP. Structural modifiers such as B 2 O 3 and Bi 2 O 3 , [ 47 ] mesoporous silica scaffolds, [ 48 ] or other dopants (Mg, [ 49 ] perovskite Li 0.348 La 0.55 TiO 3 particles, [ 50 ] Ba 0.6 Sr 0.4 TiO 3 [ 51 ] ) have been added to improve lithium‐ion transport of LAGP. Lv et al [ 16a ] added 0.5 wt% low‐volatile LiF in LAGP precursors to synthesize LAGP by a melt‐quenching method, which lowered the crystallization temperature from 622 to 605 °C, increased Li‐ion concentration to decrease the activation energy and promote Li‐ion conduction at the grain boundary.…”

Section: Lagp Structure Li‐ion Conducting Mechanism and Synthesismentioning

confidence: 99%

Progress and Perspectives of Lithium Aluminum Germanium Phosphate‐Based Solid Electrolytes for Lithium Batteries

Zhang

Liu

Xie

et al. 2023

Adv Funct Materials

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Solid‐state lithium batteries are considered promising energy storage devices due to their superior safety and higher energy density than conventional liquid electrolyte‐based batteries. Lithium aluminum germanium phosphate (LAGP), with excellent stability in air and good ionic conductivity, has gained tremendous attention over the past decades. However, the poor interface compatibility with Li anode, slow Li‐ion conduction in thick pellets, and high‐temperature sintering procedure limit the further development of LAGP solid electrolytes in practical applications. This review comprehensively summarizes the crystal structure, Li‐ion conducting mechanism, and various synthesis methods, especially the latest thin‐film preparation approach. The underlying reason for Li/LAGP interfacial instability is identified, followed by several advanced interface engineering strategies, for example, introducing a functional interlayer. The integration design of LAGP‐based solid electrolytes and cathode is also highlighted to enable high‐loading cathodes. Additionally, recent progress of lithium‐oxygen and lithium‐sulfur batteries with LAGP‐based solid electrolytes is discussed. Moreover, the different Li‐ion migration pathways, preparation procedures, and electrochemical performance of polymer‐LAGP composite solid electrolytes in Li‐ion batteries are introduced. Lastly, the remaining challenges and opportunities are proposed to encourage more efforts in this field. This review aims to provide fundamental insights and promising directions toward practical LAGP‐based solid‐state batteries.

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Section: Lagp Structure Li‐ion Conducting Mechanism and Synthesismentioning

confidence: 99%

Progress and Perspectives of Lithium Aluminum Germanium Phosphate‐Based Solid Electrolytes for Lithium Batteries

Zhang

Liu

Xie

et al. 2023

Adv Funct Materials

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“…20 Similar experiment on LAGP (Li1.5Al0.5Ge1.5(PO4)3) also achieved the conductivity improvement by introducing LLTO, although the amount of increase is smaller than that of LATP-based system. 21 X-ray diffraction and backscattered-SEM indicated that dielectric LaPO4 particles have been created by decomposing LLTO during co-sintering, which would induce the space charge layer for the conductivity improvement. However, above experiments only proved the formation of LaPO4 particles, while precise morphology of dispersed particle as well as the LATP / LaPO4 interface are still uncertain.…”

Section: Introductionmentioning

confidence: 99%

TEM Observation of LaPO<sub>4</sub>-Dispersed LATP Lithium-Ion Conductor

et al. 2021

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We have previously reported that a three-fold increase in lithium-ion conduction can be achieved on LATP (Li1.3Al0.3Ti1.7(PO4)3) by dispersing LaPO4 particles through the co-sintering of LATP with 4wt% of LLTO (Li0.348La0.55TiO3). However, the LaPO4 formation during sintering has been detected only by means of XRD and back-scattered SEM, and precise morphology of LaPO4 particles as well as LATP / LaPO4 interface have still been uncertain. In the present study, we carried out TEM experiments on the LaPO4-dispersed LATP composite to investigate the detailed microstructure and compositions of the dispersed LaPO4 particles and surrounding LATP matrix. HR-TEM coupled with EDS reveals that LaPO4 particle attains an intimate contact with the LATP matrix, which would allow the formation of space charge layer at the interface to enhance the conductivity.

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“…One of the conductive perovskites applications is the development of electrolytes for lithium-ion batteries, which are for now the critical technology in energy storage. Such solid electrolytes have crucial advantages over liquid analogs: non flammability and generally improved safety (critical for power supplies of vehicles), low-temperature stability, higher power, and energy densities [1,2]. There are other different classes of materials for solid electrolytes: phosphates on the base of NASICON, LISICON, garnets [3][4][5].…”

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confidence: 99%

THE SYNTHESIS IMPACT ON DIELECTRIC PROPERTIES OF La0.5Li0.5-xNaxTiO3

et al. 2021

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Using X-ray powder, diffraction the sequence of reactions occurring during the synthesis La0.5Li0.5-xNaxTiO3 by solid-state reaction technique has been determined. Using electron microscopy it has been shown that the grain size decreases with increasing x in La0.5Li0.5-xNaxTiO3 system. The influence of the grain size of ceramics on the dielectric characteristics has been indicated. The frequency dependences of permittivity and dielectric loss tangent have been investigated by ac impedance spectroscopy. It has been established that ceramic sample of La0.5Li0.4Na0.1TiO3 solid solution has the largest value of permittivity ɛ > 104 at wide frequency range (1–104 Hz) in La0.5Li0.5-xNaxTiO3 system.

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Synthesis and Characterization of LAGP-Based Lithium Ion-Conductive Composites with an LLTO Additive

Cited by 9 publications

References 41 publications

Progress and Perspectives of Lithium Aluminum Germanium Phosphate‐Based Solid Electrolytes for Lithium Batteries

Progress and Perspectives of Lithium Aluminum Germanium Phosphate‐Based Solid Electrolytes for Lithium Batteries

TEM Observation of LaPO<sub>4</sub>-Dispersed LATP Lithium-Ion Conductor

THE SYNTHESIS IMPACT ON DIELECTRIC PROPERTIES OF La0.5Li0.5-xNaxTiO3

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