Magnetic properties of CaCu3-xTi4-yFex+yO12 solid solutions: Valence state of iron ions and metamagnetic phase transitions

Гаврилова, Т. П.; Gilmutdinov, I. F.; Yagfarova, A.R.; Yatsyk, I. V.; Shestakov, A.V.; Fazlizhanov, I.I.; Lyadov, N. M.; Vagizov, F.G.; Deeva, J.A.; Чупахина, Т. И.; Еремина, Р. М.

doi:10.1016/j.jmmm.2022.170026

Cited by 2 publications

(1 citation statement)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This was performed to determine whether a small number of mixed valence vanadium ions create magnetic inhomogeneity. Based on our previous experiences, we know that a small amount of mixed-valence transition element ions can create magnetic inhomogeneity [ 47 , 48 , 49 ] that can directly affect other physical properties [ 47 , 48 ].…”

Section: Resultsmentioning

confidence: 99%

Li3V2(PO4)3 Cathode Material: Synthesis Method, High Lithium Diffusion Coefficient and Magnetic Inhomogeneity

Gavrilova,

Deeva,

Uporova

et al. 2024

IJMS

View full text Add to dashboard Cite

Li3V2(PO4)3 cathodes for Li-ion batteries (LIBs) were synthesized using a hydrothermal method with the subsequent annealing in an argon atmosphere to achieve optimal properties. The X-ray diffraction analysis confirmed the material’s single-phase nature, while the scanning electron microscopy revealed a granular structure, indicating a uniform particle size distribution, beneficial for electrochemical performance. Magnetometry and electron spin resonance studies were conducted to investigate the magnetic properties, confirming the presence of the relatively low concentration and highly uniform distribution of tetravalent vanadium ions (V4+), which indicated low lithium deficiency values in the original structure and a high degree of magnetic homogeneity in the sample, an essential factor for consistent electrochemical behavior. For this pure phase Li3V2(PO4)3 sample, devoid of any impurities such as carbon or salts, extensive electrochemical property testing was performed. These tests resulted in the experimental discovery of a remarkably high lithium diffusion coefficient D = 1.07 × 10−10 cm2/s, indicating excellent ionic conductivity, and demonstrated impressive stability of the material with sustained performance over 1000 charge–discharge cycles. Additionally, relithiated Li3V2(PO4)3 (after multiple electrochemical cycling) samples were investigated using scanning electron microscopy, magnetometry and electron spin resonance methods to determine the extent of degradation. The combination of high lithium diffusion coefficients, a low degradation rate and remarkable cycling stability positions this Li3V2(PO4)3 material as a promising candidate for advanced energy storage applications.

show abstract