Superionic Solid Electrolyte Li7La3Zr2O12 Synthesis and Thermodynamics for Application in All-Solid-State Lithium-Ion Batteries

Aleksandrov, Daniil; Novikov, Pavel; Popovich, Anatoliy; Wang, Qingsheng

doi:10.3390/ma15010281

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Superionic Solid Electrolyte Li₇La₃Zr₂O₁₂ Synthesis and Thermodynamics for Application in All-Solid-State Lithium-Ion Batteries

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Institute of Machinery, Materials, and Transport, Peter the Great St. Petersburg Polytechnic University, 195251 Saint Petersburg, Russia

CHN/RUS New Energy and Material Technology Research Institute, Huzhou 313100, China

Author to whom correspondence should be addressed.

Academic Editor: Alessandro DellEra

Materials 2022, 15(1), 281; https://doi.org/10.3390/ma15010281

Received: 9 December 2021 / Revised: 22 December 2021 / Accepted: 27 December 2021 / Published: 31 December 2021

(This article belongs to the Section Energy Materials)

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Abstract

Solid-state reaction was used for Li₇La₃Zr₂O₁₂ material synthesis from Li₂CO₃, La₂O₃ and ZrO₂ powders. Phase investigation of Li₇La₃Zr₂O₁₂ was carried out by x-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDS) methods. The thermodynamic characteristics were investigated by calorimetry measurements. The molar heat capacity (C_p,m), the standard enthalpy of formation from binary compounds (Δ_oxH_LLZO) and from elements (Δ_fH_LLZO), entropy (S⁰₂₉₈), the Gibbs free energy of the Li₇La₃Zr₂O₁₂ formation (∆_f G⁰₂₉₈) and the Gibbs free energy of the LLZO reaction with metallic Li (∆_rG_LLZO/Li) were determined. The corresponding values are C_p,m = 518.135 + 0.599 × T − 8.339 × T⁻², (temperature range is 298–800 K), Δ_oxH_LLZO = −186.4 kJ·mol⁻¹, Δ_fH_LLZO = −9327.65 ± 7.9 kJ·mol⁻¹, S⁰₂₉₈ = 362.3 J·mol⁻¹·K⁻¹, ∆_f G⁰₂₉₈ = −9435.6 kJ·mol⁻¹, and ∆_rG_LLZO/Li = 8.2 kJ·mol⁻¹, respectively. Thermodynamic performance shows the possibility of Li₇La₃Zr₂O₁₂ usage in lithium-ion batteries. View Full-Text

Keywords: lithium-ion battery; solid-state electrolyte; lithium-ion thermodynamics; solid-state synthesis

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Aleksandrov, D.; Novikov, P.; Popovich, A.; Wang, Q. Superionic Solid Electrolyte Li₇La₃Zr₂O₁₂ Synthesis and Thermodynamics for Application in All-Solid-State Lithium-Ion Batteries. Materials 2022, 15, 281. https://doi.org/10.3390/ma15010281

AMA Style

Aleksandrov D, Novikov P, Popovich A, Wang Q. Superionic Solid Electrolyte Li₇La₃Zr₂O₁₂ Synthesis and Thermodynamics for Application in All-Solid-State Lithium-Ion Batteries. Materials. 2022; 15(1):281. https://doi.org/10.3390/ma15010281

Chicago/Turabian Style

Aleksandrov, Daniil, Pavel Novikov, Anatoliy Popovich, and Qingsheng Wang. 2022. "Superionic Solid Electrolyte Li₇La₃Zr₂O₁₂ Synthesis and Thermodynamics for Application in All-Solid-State Lithium-Ion Batteries" Materials 15, no. 1: 281. https://doi.org/10.3390/ma15010281

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Superionic Solid Electrolyte Li₇La₃Zr₂O₁₂ Synthesis and Thermodynamics for Application in All-Solid-State Lithium-Ion Batteries

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