18O(p,p′γ)18O nuclear reaction in the determination of oxygen by proton induced γ-ray emission

Sunitha, Y.; Kumar, Sanjiv

doi:10.1007/s10967-017-5575-5

Cited by 5 publications

(1 citation statement)

References 27 publications

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“…The nuclear reactions involving Li, C, O, F, P, and V and the characteristic γ-rays emitted and detected are listed in Table . The efficacies of the PIGE and p-EBS methods in determining the elemental composition of the LiFePO 4 /C composites (doped with fluorine) from the PIGE and p-EBS spectra have been reported previously. − The estimated atomic ratios of Li, V, O, P, and F are listed in Table . The measurements were performed against a standard bearing the LiVPO 4 F composition.…”

Section: Resultsmentioning

confidence: 80%

Lithium Vanadium Polyanionic Composite Multielectron Intercalation Cathode Derived from Thermodynamically Unstable Li₂VP₂O₇/Li₂VP₂O₇F

Lokeswararao

Viji

Budumuru

et al. 2022

ACS Appl. Energy Mater.

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LiVP 2 O 7 is a well-explored cathode that supports reversible single electron extraction with a theoretical capacity of 115 mA h g −1 . Hypothetical Li 2 VP 2 O 7 F or Li 2 VP 2 O 7 compounds, with an additional Li and F in the structure or Li with vanadium in the lower oxidation state V 2+ , are expected to exchange two moles of lithium from the cathode. Li 2 VP 2 O 7 F synthesis is attempted through a sol−gel process to explore the possibility of such multielectron cathode material. Several syntheses with final annealing at 800 °C in the Ar or N 2 /H 2 (95:5) resulted in compounds exhibiting identical X-ray diffraction (XRD) patterns. However, none of these compositions has any significant fluorine content in them. Surprisingly, sol−gel synthesis of the nominal composition, i.e., Li 2 VP 2 O 7 , without any F addition in the initial precursor also resulted in a similar XRD pattern. These XRD patterns are comparable to the ones reported in the literature for Li 2 VP 2 O 7 composition. Interestingly, we find that neither the Li 2 VP 2 O 7 F nor Li 2 VP 2 O 7 compound is thermodynamically stable. Rather, it forms roughly an equimolar structural mixture of three different phases, viz., Li 9 V 3 (P 2 O 7 ) 3 (PO 4 ) 2 , Li 3 V 2 (PO 4 ) 3 , and LiVP 2 O 7 , as discerned from the detailed structural studies performed using X-ray diffraction, Rietveld refinement, and chemical composition analysis performed using proton-induced γ-ray emission and proton elastic backscattering spectrometry. The electrochemical studies, interestingly, exhibit two reversible redox processes with nearly flat potential and an average voltage of 3.86 and 1.72 V. A very high first cycle capacity of ∼340 mA h g −1 is reported for the first time. The capacity related to second Li fades upon cycling, providing a net capacity of ∼200 mA h g −1 . The nominal composition of Li 2 VP 2 O 7 F synthesized in N 2 /H 2 (95:5) gas flow exhibited the best electrochemical properties for a single lithium intercalation reaction. KEYWORDS: lithium-ion battery, Li 2 VP 2 O 7 F and Li 2 VP 2 O 7 cathodes, sol−gel method, multielectron intercalation, electrochemical properties

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Section: Resultsmentioning

confidence: 80%

Lithium Vanadium Polyanionic Composite Multielectron Intercalation Cathode Derived from Thermodynamically Unstable Li₂VP₂O₇/Li₂VP₂O₇F

Lokeswararao

Viji

Budumuru

et al. 2022

ACS Appl. Energy Mater.

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Development and applications of in situ current normalized PIGE method using proton beams for quantification of low Z elements

Acharya

Pujari

2018

J Radioanal Nucl Chem

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Studies on synthesis of plasma fusion relevant tungsten dust particles and measurement of their hydrogen absorption properties

Sarmah

Aomoa

Sarma

et al. 2018

Fusion Engineering and Design

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18O(p,p′γ)18O nuclear reaction in the determination of oxygen by proton induced γ-ray emission

Cited by 5 publications

References 27 publications

Lithium Vanadium Polyanionic Composite Multielectron Intercalation Cathode Derived from Thermodynamically Unstable Li₂VP₂O₇/Li₂VP₂O₇F

Lithium Vanadium Polyanionic Composite Multielectron Intercalation Cathode Derived from Thermodynamically Unstable Li₂VP₂O₇/Li₂VP₂O₇F

Development and applications of in situ current normalized PIGE method using proton beams for quantification of low Z elements

Studies on synthesis of plasma fusion relevant tungsten dust particles and measurement of their hydrogen absorption properties

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18O(p,p′γ)18O nuclear reaction in the determination of oxygen by proton induced γ-ray emission

Cited by 5 publications

References 27 publications

Lithium Vanadium Polyanionic Composite Multielectron Intercalation Cathode Derived from Thermodynamically Unstable Li2VP2O7/Li2VP2O7F

Lithium Vanadium Polyanionic Composite Multielectron Intercalation Cathode Derived from Thermodynamically Unstable Li2VP2O7/Li2VP2O7F

Development and applications of in situ current normalized PIGE method using proton beams for quantification of low Z elements

Studies on synthesis of plasma fusion relevant tungsten dust particles and measurement of their hydrogen absorption properties

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Product

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Lithium Vanadium Polyanionic Composite Multielectron Intercalation Cathode Derived from Thermodynamically Unstable Li₂VP₂O₇/Li₂VP₂O₇F

Lithium Vanadium Polyanionic Composite Multielectron Intercalation Cathode Derived from Thermodynamically Unstable Li₂VP₂O₇/Li₂VP₂O₇F