Room temperature synthesis and phase transformation of lithium phosphate Li<sub>3</sub>PO<sub>4</sub>as solid electrolyte

Ishigaki, Norikazu; Akimoto, Junji

doi:10.1080/21870764.2021.1891662

Cited by 9 publications

(3 citation statements)

References 16 publications

(27 reference statements)

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“…The observed peak positions coincided with the cubic crystal structure with the F 4̅3 m space group. This confirmed the successful formation of Li-argyrodite type solid electrolyte. − In addition, Li 3 PO 4 impurity peaks were observed at 2θ = 22.0°, 22.9°, 24.5°; Li 2 S and LiCl impurity peaks were observed at 26.8° and 49.9°, respectively . Usually, impurity peaks of Li 3 PO 4 , Li 2 S, and LiCl are observed during the preparation of argyrodite solid electrolyte by solution synthesis.…”

Section: Resultssupporting

confidence: 54%

Rapid Synthesis of Highly Conductive Li₆PS₅Cl Argyrodite-Type Solid Electrolytes Using Pyridine Solvent

Rajagopal

Sivalingam

Jung

et al. 2022

ACS Appl. Energy Mater.

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Lithium-ion highly conducting Li6PS5Cl argyrodite-type solid electrolyte was prepared by a facile solution process using pyridine solvent as the reaction medium. During the synthesis process, an excess amount of P2S5 was added to suppress impurity peaks and enhance the ionic conductivity. Powder X-ray diffraction analyses were carried out to analyze the crystalline phase and purity of the prepared Li6PS5Cl solid electrolyte. In addition, laser Raman spectroscopy and XPS were employed to confirm the formation of Li6PS5Cl solid electrolyte. Highly conductive Li6PS5Cl solid electrolyte was obtained following a series of optimization processes, and it was found that the Li6PS5Cl-15 P2S5 solid electrolyte shows a high ionic conductivity value (4.3 mS cm–1) at room temperature. We have used cyclic voltammetry (CV), DC polarization, and galvanostatic charge–discharge techniques to study the electrochemical performance of the selected Li6PS5Cl-15 P2S5 solid electrolyte.

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Section: Resultssupporting

confidence: 54%

Rapid Synthesis of Highly Conductive Li₆PS₅Cl Argyrodite-Type Solid Electrolytes Using Pyridine Solvent

Rajagopal

Sivalingam

Jung

et al. 2022

ACS Appl. Energy Mater.

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“…For Li 3 PO 4 single phase sample was investigated and reported by Norikazu et al ( 2021) that particles of size 20-30 nm suitable for the fabrication of dense solid electrolyte in all-solid-state lithium battery applications (28) . Our present glass system BPZL6 and BPZL7 are containing the crystallite size of 21-25 nm is comparable to Li 3 PO 4 nano-crystallite phase.…”

Section: Conductivitymentioning

confidence: 99%

DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

Husenkhan¹,

Sankarappa²,

Malge³

2021

IJST

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Objectives: Investigation of electrical transport properties of glass system in the composition (P 2 O 5 ) 0.65−x (B 2 O 3 ) 0.1 (ZnO) 0.25 (Li 2 O) x where x=0.10, 0.15, 0.20, 0.25, 0.30, 0.35 and 0.40 and establish the conduction mechanisms. Methods: Glasses were synthesized using the standard melt quenching technique at 1473K. The samples were confirmed to be amorphous through XRD studies. An independent measurement of dc conductivity was carried out for temperature range 300-620K, by following two probe method. Findings: Conductivity of the present glasses is found to be of the order of 10 -3 (Ω m) -1 which is higher than the reported values for lithium-ion solid-state electrolytes. Conductivity variation with temperature obeyed Mott's Small Polaron Hopping at high temperatures and Variable Range Hopping at low temperatures. SPH model fits to the conductivity gave activation energies in the range 58-409 meV. VRH model fits gave density of states at Fermi level of the order of 10 23 eV -1 m -3 . The nano-crystallite phases identified and determined size found to be in the range 5-37 nm and considered to be a glass-nanocomposites. Novelty/Applications: For the first time, zinc-lithium-borophosphate glasses are investigated for conduction mechanisms. Activation energy and density of states at the Fermi level are determined. At high temperature Mott's SPH model and at low temperature Mott's VRH model are found to be suitable to explain conductivity of these glasses.

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“…Indeed, γ-Li 3 PO 4 is known to have higher Li-ion conduction than β-Li 3 PO 4 . Since it had been reported that β-Li 3 PO 4 transformed to γ-Li 3 PO 4 around 723 K, 33 we attempted to convert experimentally obtained β-Li 3 PO 4 -type Li 2.75 [B 0.625 P 0.125 S 0.25 ]O 3.375 to γ-Li 3 PO 4 -type structure by heat treatment, but it was not successful. It is also possible that the bulk ionic conductivity is higher and the grain boundary lowers the total conductivity.…”

Section: R Y S T a L S T R U C T U R E O F H P -S Y N T H E S I Z E D Limentioning

confidence: 99%

Theoretical Prediction and High-Pressure Synthesis of New LISICON-Type Solid-State Electrolyte Li_2.75[B_0.625P_0.125S_0.25]O_3.375

et al. 2023

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A new LISICON-type solid-state electrolyte in Li3BO3–Li3PO4–Li2SO4 ternary system, Li2.75[B0.625P0.125S0.25]O3.375, was theoretically investigated by DFT calculation and was predicted to have high bulk Li-ion conductivity of 2.8 × 10–3 S/cm at room temperature. The high-pressure synthesized sample was found to adopt a β-Li3PO4-type structure without theoretically predicted B/P/S ordering and random distribution of these anions. The presence of oxygen deficiency and triangular coordinated B3+ was confirmed by 11B NMR measurement. The experimental conductivity was rather small, 7.54 × 10–9 S/cm at room temperature, most probably because of the structural difference from the theoretically predicted B/P/S-ordered γ-Li3PO4-type one.

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Room temperature synthesis and phase transformation of lithium phosphate Li₃PO₄as solid electrolyte

Cited by 9 publications

References 16 publications

Rapid Synthesis of Highly Conductive Li₆PS₅Cl Argyrodite-Type Solid Electrolytes Using Pyridine Solvent

Rapid Synthesis of Highly Conductive Li₆PS₅Cl Argyrodite-Type Solid Electrolytes Using Pyridine Solvent

DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

Theoretical Prediction and High-Pressure Synthesis of New LISICON-Type Solid-State Electrolyte Li_2.75[B_0.625P_0.125S_0.25]O_3.375

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Room temperature synthesis and phase transformation of lithium phosphate Li3PO4as solid electrolyte

Cited by 9 publications

References 16 publications

Rapid Synthesis of Highly Conductive Li6PS5Cl Argyrodite-Type Solid Electrolytes Using Pyridine Solvent

Rapid Synthesis of Highly Conductive Li6PS5Cl Argyrodite-Type Solid Electrolytes Using Pyridine Solvent

DC Conductivity of Lithium-Zinc-Boro- Phosphate Glasses

Theoretical Prediction and High-Pressure Synthesis of New LISICON-Type Solid-State Electrolyte Li2.75[B0.625P0.125S0.25]O3.375

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Room temperature synthesis and phase transformation of lithium phosphate Li₃PO₄as solid electrolyte

Rapid Synthesis of Highly Conductive Li₆PS₅Cl Argyrodite-Type Solid Electrolytes Using Pyridine Solvent

Rapid Synthesis of Highly Conductive Li₆PS₅Cl Argyrodite-Type Solid Electrolytes Using Pyridine Solvent

Theoretical Prediction and High-Pressure Synthesis of New LISICON-Type Solid-State Electrolyte Li_2.75[B_0.625P_0.125S_0.25]O_3.375