Characterization of the Li-ionic conductivity of La(2/3−x)Li3xTiO3 ceramics used for all-solid-state batteries

Trong, Le Dinh; Thảo, Trần Phương; Định, Nguyễn Năng

doi:10.1016/j.ssi.2015.05.027

Cited by 36 publications

(22 citation statements)

References 19 publications

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“…By optimizing sintering temperature, holding time and quenching process, a bulk conductivity as high as 1.8 × 10 −3 S/cm was also reported for Li 0.33 La 0.557 TiO 3. The relatively high σ b of 1.65 × 10 −3 S/cm in this work could be due to the pure cubic structure and low porosity. By comparison, the grain‐boundary conductivity in literatures is very dispersed, and distributes from 6 × 10 −6 S/cm to 9.2 × 10 −4 S/cm Similar with the bulk σ b , σ gb was also influenced by composition, phase purity and porosity.…”

Section: Resultsmentioning

confidence: 60%

Electrochemical and mechanical stability of Li_xLa_0.557TiO_3‐δ perovskite electrolyte at various voltages

Yan

Cheng

et al. 2018

J Am Ceram Soc

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Perovskite LixLa0.557TiO3 electrolytes in all‐solid‐state lithium batteries are operated under a voltage gradient, which potentially induces the electrochemical and mechanical instability. To simulate the properties of LixLa0.557TiO3 (LLTO) under application relevant conditions, samples are charged (or discharged) to 0.2 V, 3.2 V, 4.0 V, and 4.5 V, respectively. The Li ion conductivity is 9.55 × 10−5 S/cm at 3.2 V and decreases obviously to 2.54 × 10−5 S/cm as the voltage increases to 4.5 V, whereas the value of the LLTO‐0.2 V is between that of LLTO‐3.2 V and LLTO‐4.0 V. In terms of mechanical behavior, elastic modulus (E), hardness (H), and fracture toughness (KIC) of LLTO operated at different voltages are also tested using depth‐sensitive indentation. The results can be used in the designing, monitoring and also improving of the battery cells.

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Section: Resultsmentioning

confidence: 60%

Electrochemical and mechanical stability of Li_xLa_0.557TiO_3‐δ perovskite electrolyte at various voltages

Yan

Cheng

et al. 2018

J Am Ceram Soc

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“…The first intersection of the semicircle and Z′ axis reflects the bulk resistance (R b ), while the semicircle represents the grain-boundary resistance (R gb ). 43 As the ionic conductivity is considerably higher than the electronic conductivity, the electronic conductance can be neglected at high and medium frequencies. Therefore, R gb and R b correspond to the ionic resistance.…”

Section: Resultsmentioning

confidence: 99%

Improvement in electronic conductivity of perovskite electrolyte by variable‐valence element doping

et al. 2020

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The perovskite electrolyte Li0.33La0.557TiO3 (LLTO) exhibits high mechanical stability, high ionic conductivity, and low strain during cycling. The cycle stability has been significantly improved using LLTO as a coating material for cathode particles. However, the electronic conductivity of LLTO is very low, which affects electrochemical performances. In this study, variable‐valence elements (Fe, Ni, Co, and Cr) are added to the perovskite to increase the electronic conductivity. The materials are fabricated using a high‐temperature solid‐state reaction method. The phase compositions are characterized by X‐ray diffraction (XRD), while the microstructures are analyzed by scanning electron microscopy. The electronic conductivity of the doped sample is increased by three orders of magnitude, while the ionic conductivity is slightly reduced. The Cr‐doped sample exhibits the highest electronic conductivity of 9.18 × 10−7 S cm−1. The search for mixed conducting perovskites paves the way for the development of efficient coatings for cathode particles.

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“…Recently, Li et al [7] reported the preparation of LLTO thin films by electron beam deposition, and their results showed that amorphous LLTO thin films deposited by e-beam with ionic conductivity of 10 −5 S/cm that is suitable for application as a large-area electrolyte for thin-film batteries and electrochromic windows. We have shown that at room temperature LLTO bulk materials prepared by conventional solid-state reaction possess a larger Li + ion conductivity from 10 −4 ÷ 10 −3 S/cm [8].…”

Section: Introductionmentioning

confidence: 94%

Preparation and Characterization of La0.67–x Li3x TiO3 Solid-State Electrolyte Used for Electrochromic Mirrors

Trong¹,

Định²,

Thanh³

2016

MSA

Self Cite

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With the aim of producing all-solid-state electrochromic mirrors, La 0.67−x Li 3x TiO 3 (LLTO) and the WO 3 were prepared by electron beam deposition. The LLTO (with x = 0.11) powder was synthesized by thermally ball-grinding method and the Li + ionic conductivity of the LLTO ceramic targets was found to be of ca. 3.25 × 10 −3 S/cm. Using LLTO targets for e-beam evaporation, 300 nm-thick films with the Li + ionic conductivity of 5.50 × 10 −5 S/cm were deposited. Combining LLTO films with WO 3 /ITO and LiMn 2 O 4 layers, all-solid-state electrochromic mirrors with a laminar structure of Al/LiMn 2 O 4 /LLTO/WO 3 /ITO were prepared. The reversible reflectance of the mirrors was well controlled by applying polarized potentials onto the ITO electrode. The obtained results suggest useful applications for electrochromic windows working as a smart reflectance mirror that can be used for auto rear-view mirrors.

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Characterization of the Li-ionic conductivity of La(2/3−x)Li3xTiO3 ceramics used for all-solid-state batteries

Cited by 36 publications

References 19 publications

Electrochemical and mechanical stability of Li_xLa_0.557TiO_3‐δ perovskite electrolyte at various voltages

Electrochemical and mechanical stability of Li_xLa_0.557TiO_3‐δ perovskite electrolyte at various voltages

Improvement in electronic conductivity of perovskite electrolyte by variable‐valence element doping

Preparation and Characterization of La<sub>0.67–x </sub>Li<sub>3x </sub>TiO<sub>3</sub> Solid-State Electrolyte Used for Electrochromic Mirrors

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Characterization of the Li-ionic conductivity of La(2/3−x)Li3xTiO3 ceramics used for all-solid-state batteries

Cited by 36 publications

References 19 publications

Electrochemical and mechanical stability of LixLa0.557TiO3‐δ perovskite electrolyte at various voltages

Electrochemical and mechanical stability of LixLa0.557TiO3‐δ perovskite electrolyte at various voltages

Improvement in electronic conductivity of perovskite electrolyte by variable‐valence element doping

Preparation and Characterization of La&lt;sub&gt;0.67–x &lt;/sub&gt;Li&lt;sub&gt;3x &lt;/sub&gt;TiO&lt;sub&gt;3&lt;/sub&gt; Solid-State Electrolyte Used for Electrochromic Mirrors

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Electrochemical and mechanical stability of Li_xLa_0.557TiO_3‐δ perovskite electrolyte at various voltages

Electrochemical and mechanical stability of Li_xLa_0.557TiO_3‐δ perovskite electrolyte at various voltages

Preparation and Characterization of La<sub>0.67–x </sub>Li<sub>3x </sub>TiO<sub>3</sub> Solid-State Electrolyte Used for Electrochromic Mirrors