Studies on structural, Optical and electrical properties of K2Ba3(P2O7)2

Ajili, M.; Louati, B.

doi:10.1007/s00339-021-05200-6

Cited by 8 publications

(2 citation statements)

References 57 publications

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“…In the FTIR spectra, the peaks at 1002 and 1440 cm –1 can be ascribed to the P–O and PO stretching of PO 4 3– (Figure c). A new peak in the FTIR spectra of the reacted LAGP at 1087 cm –1 is contributed by the symmetric stretching of PO 3 in P 2 O 7 4– . Furthermore, in Raman spectroscopy of the pristine LAGP, the peaks at 456, 611, and 1108 cm –1 can be ascribed to v 2 symmetric bending, v 4 antisymmetric bending, and v 1 + v 3 symmetric and antisymmetric modes of PO 4 3– , respectively (Figure d) .…”

Section: Resultsmentioning

confidence: 91%

Degradation of a Li_1.5Al_0.5Ge_1.5(PO₄)₃-Based Solid-State Li-Metal Battery: Corrosion of Li_1.5Al_0.5Ge_1.5(PO₄)₃ against the Li-Metal Anode

Tong

Lai

Liu

et al. 2022

ACS Appl. Energy Mater.

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Solid-state Li-metal batteries were widely studied to reach an energy density of 500 mAh kg −1 before 2030. However, the interfacial parasitic reaction between the Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) solid-state electrolyte and Li metal generates a mixed conducting interphase (MCI), which grows continuously and leads to the fast degradation of the battery. In previous work, the role of electron transport in the corrosion of LAGP is highlighted. Herein, it has been found that Liion transport also plays an important role in the corrosion of LAGP. In the degradation of LAGP, the Li-ion injection through Li1 sites on the (012) plane leads to the fast corrosion of the plane, as detected by grazing incidence X-ray diffraction. The extra Li ion brings electrons to occupy the nearby Ge 4+ . Simultaneously, the additional interstitial Li ion distorts the local structure and breaks the PO 4 tetrahedron. As a result, the corner-shared GeO 6 octahedron and PO 4 tetrahedron are destructed. The decomposition of LAGP generates a Li-rich MCI, which shows increased electronic conductivity compared with pristine LAGP. The high chemical potential of the Li atom at the MCI results in the continuous corrosion of LAGP. Furthermore, it has been found that ambipolar diffusion at the interface plays an important role in the growth of MCI. The MCI grows faster when ions and electrons are diffused in the same direction motivated by the chemical potential differences of the Li atom. If the cell is cycled at a small current of 0.05 mA cm −2 to separate the diffusion of electrons and ions, the MCI grows at a slower rate. Therefore, the corrosion of LAGP can be ascribed to the chemical diffusion of the Li atom. The ion and electron transport play equally important roles in the electrochemical corrosion of LAGP.

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Section: Resultsmentioning

confidence: 91%

Degradation of a Li_1.5Al_0.5Ge_1.5(PO₄)₃-Based Solid-State Li-Metal Battery: Corrosion of Li_1.5Al_0.5Ge_1.5(PO₄)₃ against the Li-Metal Anode

Tong

Lai

Liu

et al. 2022

ACS Appl. Energy Mater.

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“…35 At the same time, the peaks at 959 and 1094 cm −1 are the antisymmetric vibration of the P−O−P bridge and PO 3 asymmetric vibration, respectively. 36,37 The existence of three characteristic peaks of P 2 O 7 2− further explained that high purity Fe 2 P 2 O 7 was obtained after calcination.…”

Section: Optimization Of Leachingmentioning

confidence: 90%

All-Component Recycling and Reuse Process for Spent LiFePO₄ Cathodes

Zeng,

Wang,

Cai

et al. 2024

Ind. Eng. Chem. Res.

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With the termination of the life of the first generation of power batteries, a substantial quantity of lithium iron phosphate (LiFePO 4 ) batteries necessitates recycling. The mainstream recycling process is lithium leaching with acid leaching systems and cathode material regeneration. However, the binder poly(vinylidene fluoride) (PVDF) and the conductive carbon in the cathode material are not utilized. In this paper, a new two-step recycling process is proposed: (1) an acid-free lithium leaching route using a single component K 2 S 2 O 8 as a leaching agent and (2) utilizing the residual carbon in the leaching residue to produce Fe 2 P 2 O 7 , which can be used as anodes for batteries, by high-temperature carbothermal reduction of FePO 4 . By optimizing the leaching process parameters, 98.9 wt % of the lithium in the cathode material can be selectively released. The electrochemical characteristics of Fe 2 P 2 O 7 synthesized at various carbothermal reduction temperatures were assessed, revealing that the sample produced at 700 °C exhibited the most favorable electrochemical attributes. Even after 750 cycles at a current density of 1.0 A/g, the catalyst retained a specific capacity of 160 mAh/g. This research introduces an innovative approach for the comprehensive recuperation of all components in recycling LiFePO 4 .

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Structure Modulation and Charge Transfer in Self‐Reduction Phosphors: A Review

Wang,

Mei,

et al. 2024

Laser & Photonics Reviews

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Traditional luminescent materials commonly exhibit single‐duration emissions and single‐timed emissions with limited emission peaks. Developing a material with multicolor, variable temporal, and multimodal luminescence is a significant challenge. Self‐reduction phosphors have attracted considerable interest for their distinctive properties and versatile applications. Distinguished by their rigid structure and exceptional purity, offer a safer alternative to conventional reduction methods using hazardous gases H2/CO/N2. However, synthesizing these phosphors with precise control over self‐reduction and defect regulation is complex. Therefore, innovative structures and substrates are essential to address these challenges. This review discusses the latest developments in phosphors doped with ions such as Eu3+, Mn4+, Ce4+, and Yb3+, examining the origins and advancements in self‐reduction. It covers classifications, mechanisms, defects, and applications, with an emphasis on techniques for controlled self‐reduction through structural and charge transfer modifications. This work aims to provide valuable insights to facilitate further research and innovation endeavors.

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Studies on structural, Optical and electrical properties of K2Ba3(P2O7)2

Cited by 8 publications

References 57 publications

Degradation of a Li_1.5Al_0.5Ge_1.5(PO₄)₃-Based Solid-State Li-Metal Battery: Corrosion of Li_1.5Al_0.5Ge_1.5(PO₄)₃ against the Li-Metal Anode

Degradation of a Li_1.5Al_0.5Ge_1.5(PO₄)₃-Based Solid-State Li-Metal Battery: Corrosion of Li_1.5Al_0.5Ge_1.5(PO₄)₃ against the Li-Metal Anode

All-Component Recycling and Reuse Process for Spent LiFePO₄ Cathodes

Structure Modulation and Charge Transfer in Self‐Reduction Phosphors: A Review

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Studies on structural, Optical and electrical properties of K2Ba3(P2O7)2

Cited by 8 publications

References 57 publications

Degradation of a Li1.5Al0.5Ge1.5(PO4)3-Based Solid-State Li-Metal Battery: Corrosion of Li1.5Al0.5Ge1.5(PO4)3 against the Li-Metal Anode

Degradation of a Li1.5Al0.5Ge1.5(PO4)3-Based Solid-State Li-Metal Battery: Corrosion of Li1.5Al0.5Ge1.5(PO4)3 against the Li-Metal Anode

All-Component Recycling and Reuse Process for Spent LiFePO4 Cathodes

Structure Modulation and Charge Transfer in Self‐Reduction Phosphors: A Review

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Degradation of a Li_1.5Al_0.5Ge_1.5(PO₄)₃-Based Solid-State Li-Metal Battery: Corrosion of Li_1.5Al_0.5Ge_1.5(PO₄)₃ against the Li-Metal Anode

Degradation of a Li_1.5Al_0.5Ge_1.5(PO₄)₃-Based Solid-State Li-Metal Battery: Corrosion of Li_1.5Al_0.5Ge_1.5(PO₄)₃ against the Li-Metal Anode

All-Component Recycling and Reuse Process for Spent LiFePO₄ Cathodes