Preparation and properties of LixLa0.5TiO3 perovskite oxide electrolytes

Hu, Xitao; Qiang, Wenjiang; Huang, Baotong

doi:10.1111/jace.14946

Cited by 8 publications

(5 citation statements)

References 29 publications

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“…Young's modulus ( E ) and hardness ( H ) were tested with a CSM instruments (Anton Paar CSM Nano‐Indentation Tester), equipped with a Berkovich tip, on the sample surface. The fracture toughness ( K IC ) was determined using the same instrument, however, using higher loads and a Vickers tip . The indentation fracture toughness K IC was derived from the equation:

K_{normalIC} = k {()(, \frac{E}{H})}^{1 / 2} \frac{F_{m}}{c^{3 false/ 2}}

where c is the crack length, F m is the load.…”

Section: Methodsmentioning

confidence: 99%

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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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K_{normalIC} = k {()(, \frac{E}{H})}^{1 / 2} \frac{F_{m}}{c^{3 false/ 2}}

where c is the crack length, F m is the load.…”

Section: Methodsmentioning

confidence: 99%

“…The indentation fracture toughness K IC was derived from the equation:

K_{normalIC} = k {()(, \frac{E}{H})}^{1 / 2} \frac{F_{m}}{c^{3 false/ 2}}

where c is the crack length, F m is the load. The constant k = 0.016 is used for the Vicker's tip …”

Section: Methodsmentioning

confidence: 99%

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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“…Instrumented indentation and ultrasonic measurement are common methods to measure elastic modulus (E), hardness (H), and fracture toughness (K Ic ) [35,107,108]. These mechanical properties then determine the ability of the SSE to withstand stresses from the two electrodes during battery cycling [106,109].…”

Section: Ssesmentioning

confidence: 99%

Fracture behavior in battery materials

Zhao

Shen

et al. 2020

J. Phys. Energy

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The fracture of battery materials is one of the main causes of battery degradation. This issue is further amplified in emerging solid-state batteries, where the more robust interface between the liquid electrolyte and solid electrode in conventional batteries is replaced by a brittle solid-solid interface. In this review, we summarize the observed fracture behavior in battery materials, the origin of fracture initiation and propagation, as well as the factors that affect the fracture processes of battery materials. Both experimental and modeling analyses are presented. Finally, future developments regarding the quantification of fracture, the interplay of chemo-mechanical factors, and battery lifespan design are discussed along with a proposed theoretical framework, in analogy to fatigue damage, to better understand battery material fracture upon extended cycling.

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“…Figure compares the fracture toughness value of the R-LLTO film to that of other perovskites, , garnet, − NASICON-type, − and amorphous , or organic–inorganic composite SSEs reported in the literature. As shown in Figure , the R-LLTO SSE film has a higher fracture toughness than LLTO SSEs with different Li molar compositions (0.37, 0.49, and 0.56) and LLTO SSEs synthesized using sol–gel and solid-state reaction methods that differ from the solution processing method used for the R-LLTO SSE.…”

Section: Resultsmentioning

confidence: 99%

Robust and Manufacturable Lithium Lanthanum Titanate-Based Solid-State Electrolyte Thin Films Deposited in Open Air

et al. 2023

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State-of-the-art solid-state electrolytes (SSEs) are limited in their energy density and processability based on thick, brittle pellets, which are generally hot pressed in vacuum over the course of several hours. We report on a high-throughput, open-air process for printable thin-film ceramic SSEs in a remarkable oneminute time frame using a lithium lanthanum titanium oxide (LLTO)-based SSE that we refer to as robust LLTO (R-LLTO). Powder XRD analysis revealed that the main phase of R-LLTO is polycrystalline LLTO, accompanied by selectively retained crystalline precursor phases. R-LLTO is highly dense and closely matched to the stoichiometry of LLTO with some heterogeneity throughout the film. A minimal presence of lithium carbonate is identified despite processing fully in ambient conditions. The LLTO films exhibit remarkable mechanical properties, demonstrating both flexibility with a low modulus of ∼35 GPa and a high fracture toughness of >2.0 MPa m . We attribute this mechanical robustness to several factors, including grain boundary strengthening, the presence of precursor crystalline phases, and a decrease in crystallinity or ordering caused by ultrafast processing. The creation of R-LLTO�a ceramic material with elastic properties that are closer to polymers with higher fracture toughness�enables new possibilities for the design of robust solid-state batteries.

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Preparation and properties of Li_xLa_0.5TiO₃ perovskite oxide electrolytes

Cited by 8 publications

References 29 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

Fracture behavior in battery materials

Robust and Manufacturable Lithium Lanthanum Titanate-Based Solid-State Electrolyte Thin Films Deposited in Open Air

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Preparation and properties of LixLa0.5TiO3 perovskite oxide electrolytes

Cited by 8 publications

References 29 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

Fracture behavior in battery materials

Robust and Manufacturable Lithium Lanthanum Titanate-Based Solid-State Electrolyte Thin Films Deposited in Open Air

Contact Info

Product

Resources

About

Preparation and properties of Li_xLa_0.5TiO₃ perovskite oxide electrolytes

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