Structural, electrical and luminescence properties of M2V2O7 (M = Mg, Ca, Sr, Ba, Zn)

Kaur, Puneet; Khanna, Atul

doi:10.1007/s10854-021-06710-y

Cited by 10 publications

(10 citation statements)

References 58 publications

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“…The electrochemical investigations evidenced that the battery capacity is strongly related to the amount of the conductive additive. It is shown that (i) the higher the quantity of C65, the higher the specific capacity of the batteries – most likely due to the poor conductivity of CVO [48] . In this way, C65 is required to build the conductive network (ii) the applied C‐rate influences the battery capacity and should be considered during the electrode design since higher C‐rates require higher porosities.…”

Section: Discussionmentioning

confidence: 99%

“…[37][38][39][40][41] For the reasons mentioned above, calcium pyrovanadate (CVO) could be an alternative since calcium and vanadium are nontoxic in standard concentrations and abundant on Earth [42] and possess a layered framework with a triclinic structure. Even after studying for years since 1981, [20,[43][44][45][46][47][48][49] the application of CVO as a component in LIBs is still not widely exploited.…”

Section: Introductionmentioning

confidence: 99%

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Ca₂V₂O₇ as an Anode‐Active Material for Lithium‐Ion Batteries: Effect of Conductive Additive and Mass Loading on Electrochemical Performance

et al. 2023

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Lithium‐ion batteries (LIBs) play a crucial role in using renewable sources. Vanadates have been applied as anode material due to the combined diffusion mechanisms and higher and stable capacities. Despite the interest in vanadates as anode materials, only a few studies have considered Ca2V2O7 (CVO) as an active material for LIBs. This work focuses on the use of CVO as a potential alternative anode‐active material for LIBs. Additionally, we investigate the effect of the conductive additive (C65) on the electrochemical properties of the electrodes, utilizing densified electrodes with a porosity of about 40 %. In doing so, this study provides important insights into new materials for LIBs, where the electrodes were manufactured using the commercial slurry methodology, replacing graphite by CVO – which was synthesized via the Pechini route (D50: 8 μm after milling). In summary, the results reveal that the amount of C65 positively affects the electrode‘s capacity. An increase in specific capacity was observed by up to 30 % using 10 wt.% C65. Such electrodes showed 235 mAh/gAM at C/10 and, when cycled at 1 C, completed 300 cycles with a retained capacity of 39 %. The results demonstrate that CVO might be a promising anode material for LIB energy storage systems.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ca₂V₂O₇ as an Anode‐Active Material for Lithium‐Ion Batteries: Effect of Conductive Additive and Mass Loading on Electrochemical Performance

et al. 2023

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“…Taxak et al 25 found red emission (620 nm) in nanophosphor Eu-doped Ca 2 V 2 O 7 upon excitation at 305 nm. Most recently, Ca 2 V 2 O 7 was synthesized by Kaur et al 21 via a solid-state reaction method and found that photoluminescence spectroscopy (PL) exhibits a broad band ranging from 350 to 600 nm, with a maximum at 510 nm. In recent years, Ca 2 V 2 O 7 has been studied increasingly because its special layer structure makes it a potential energy storage material for LIBs or supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

“…This results in versatile properties of vanadium-based materials, such as superconductors (MV 3 Sb 5 (M = Cs, K)) , and metal-ion batteries (Li/Na/Mg/Al/K/Ca/Zn ions) − and catalytic , and optoelectronic devices (VO 2 , V 2 O 5 ), , etc. In particular, due to the unique structural properties of a layered crystal structure, broad and intense O 2– V 5+ charge transfer bands, eco-friendliness, and low cost, the calcium pyrovanadate (Ca 2 V 2 O 7 ) has been widely used in microwave dielectrics, supercapacitors, lithium-ion batteries (LIBs), vanadium extraction, , and phosphors − to name a few. These applications focus primarily on the unique structural properties of Ca 2 V 2 O 7 .…”

Section: Introductionmentioning

confidence: 99%

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Bonding Inhomogeneity and Strong Anharmonicity Induce Ultralow Lattice Thermal Conductivity in Calcium Pyrovanadate

et al. 2022

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Calcium pyrovanadate (Ca2V2O7) has been reported as an advanced functional material for optoelectronics and energy storage owing to its layered crystal structure and intense O2–V5+ charge transfer bands. Therefore, the studies on the physicochemical properties of Ca2V2O7 to further improve its service performance are indispensable. Herein, we systemically investigate the structural, lattice dynamic, and thermodynamic properties of Ca2V2O7 utilizing experimental measurements and first-principles calculations. The measured heat capacity is found to obviously break through the Dulong–Petit limit, indicating that strong anharmonicity is present in Ca2V2O7. Furthermore, we reveal the hierarchical thermal transport behavior of Ca2V2O7 in the dual-phonon theory framework and predict the ultralow lattice thermal conductivity (κ) with values of 2.15, 2.11, and 1.91 W/mK along the a, b, and c axes at 300 K. The results indicate that a significant contribution from diffusive thermal transport to the κ is observed, leading to a temperature-dependent κ much flatter than that of the general law of κ ∼ T –1 in most other materials. This study not only promotes the diverse applications of Ca2V2O7 such as thermal insulating materials and batteries but also provides novel insights into the fundamental thermal physics of calcium-intercalated layered vanadium-based oxides.

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Structural, photoluminescence, and photocatalytic performances of Ce³⁺‐activated orthovanadate oxides M₃(VO₄)₂ (M: Mg or Zn) synthesized by solution combustion route

Sharma,

Sahay

2023

Luminescence

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This paper presents a research investigation into the synthesis of vanadate oxides M3(VO4)2 (M: Mg or Zn) using the solution combustion method and investigates their structural, photoluminescence, and photocatalytic properties after introducing cerium (Ce) as a dopant. The resulting synthesized samples all display an orthorhombic crystalline structure with crystallite sizes ranging from 71 to 110 nm. Morphological diversity among the samples is revealed through field‐emission scanning electron microscopy (FESEM) imagery. Diffuse reflectance spectroscopy discloses that the introduction of Ce3+ as a dopant leads to an increase in the band gap energy. Notably, when excited at a wavelength of 340 nm, the photoluminescence emission intensity reaches its peak across all samples. This intensity undergoes enhancement due to Ce3+ doping, causing a slight shift toward shorter wavelengths attributable to the augmented band gap resulting from the dopant. Markedly, among the investigated materials, Ce3+‐activated Mg3(VO4)2 stands out with the most pronounced emission intensity, positioning it as a highly promising luminescent material. Additionally, the incorporation of Ce3+ has a positive effect on the photocatalytic performance of Mg3(VO4)2, resulting in notable improvement.

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Structural, electrical and luminescence properties of M2V2O7 (M = Mg, Ca, Sr, Ba, Zn)

Cited by 10 publications

References 58 publications

Ca₂V₂O₇ as an Anode‐Active Material for Lithium‐Ion Batteries: Effect of Conductive Additive and Mass Loading on Electrochemical Performance

Ca₂V₂O₇ as an Anode‐Active Material for Lithium‐Ion Batteries: Effect of Conductive Additive and Mass Loading on Electrochemical Performance

Bonding Inhomogeneity and Strong Anharmonicity Induce Ultralow Lattice Thermal Conductivity in Calcium Pyrovanadate

Structural, photoluminescence, and photocatalytic performances of Ce³⁺‐activated orthovanadate oxides M₃(VO₄)₂ (M: Mg or Zn) synthesized by solution combustion route

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Structural, electrical and luminescence properties of M2V2O7 (M = Mg, Ca, Sr, Ba, Zn)

Cited by 10 publications

References 58 publications

Ca2V2O7 as an Anode‐Active Material for Lithium‐Ion Batteries: Effect of Conductive Additive and Mass Loading on Electrochemical Performance

Ca2V2O7 as an Anode‐Active Material for Lithium‐Ion Batteries: Effect of Conductive Additive and Mass Loading on Electrochemical Performance

Bonding Inhomogeneity and Strong Anharmonicity Induce Ultralow Lattice Thermal Conductivity in Calcium Pyrovanadate

Structural, photoluminescence, and photocatalytic performances of Ce3+‐activated orthovanadate oxides M3(VO4)2 (M: Mg or Zn) synthesized by solution combustion route

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Ca₂V₂O₇ as an Anode‐Active Material for Lithium‐Ion Batteries: Effect of Conductive Additive and Mass Loading on Electrochemical Performance

Ca₂V₂O₇ as an Anode‐Active Material for Lithium‐Ion Batteries: Effect of Conductive Additive and Mass Loading on Electrochemical Performance

Structural, photoluminescence, and photocatalytic performances of Ce³⁺‐activated orthovanadate oxides M₃(VO₄)₂ (M: Mg or Zn) synthesized by solution combustion route