Li3V2(PO4)3/Li3PO4 Cathode Materials for Li-Ion Batteries: Synthesis and Characterization
T. P. Gavrilova,Yu.A. Deeva,T. I. Chupakhina,I. V. Yatsyk,N. M. Lyadov,Ranis Ramisovich Garipov,N. M. Suleimanov,Mikhail Khrizanforov,S. M. Khantimerov +8 more
TL;DR: Li3V2(PO4)3/Li3PO4 (LVPO/LPO) composites were synthesized by the hydrothermal method and subsequently annealed in an Ar atmosphere as discussed by the authors .
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Abstract: Li3V2(PO4)3/Li3PO4 (LVPO/LPO) composites as cathodes for Li-ion batteries were synthesized by the hydrothermal method and subsequently annealed in an Ar atmosphere. The effect of Li3PO4 content on the crystal structure, morphology and the related magnetic and electrochemical properties of Li3V2(PO4)3/Li3PO4 composites, containing 7.5 wt% and 14 wt% of Li3PO4 (LVPO/LPO-7.5 and LVPO/LPO-14) was investigated. The microstructure and morphology of the obtained composites were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM); magnetic and electrochemical properties investigations were performed using the electron spin resonance and galvanostatic methods, respectively. It was shown that Li3V2(PO4)3/Li3PO4 composites exhibit a high discharge capacity, good cycle performance (105 and 120 mAh g−1 for the 200th cycle at 1C for LVPO/LPO-7.5 and LVPO/LPO-14, respectively), and insignificant changes in the surface morphology after 200 lithiation/delithiation cycles. Our results demonstrate that the increase in Li3PO4 content led to a decrease in the Li stoichiometry and magnetic inhomogeneity in Li3V2(PO4)3 phase; thus, the improvement in the electrochemical performance of LVPO/LPO composites due to incorporation of Li3PO4 can be attributed to their chemical and magnetic inhomogeneity.
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Citations
Li3V2(PO4)3 Cathode Material: Synthesis Method, High Lithium Diffusion Coefficient and Magnetic Inhomogeneity
Tatiana Gavrilova,Yulia Deeva,Anastasiya Uporova,Tatiana Chupakhina,I. V. Yatsyk,Alexey Rogov,M. Cherosov,Ruslan Batulin,Mikhail Khrizanforov,S. Khantimerov +9 more
TL;DR: Li3V2(PO4)3 cathode material synthesized using a hydrothermal method exhibits high lithium diffusion coefficient and magnetic homogeneity. The material demonstrates impressive stability and sustained performance over 1000 charge–discharge cycles.
4
Surfactant-assisted solution combustion synthesis of Li3V2(PO4)3/C cathode material for lithium-ion battery
E. Mohammadiha,S.M. Masoudpanah,S. Alamolhoda +2 more
Abstract: In this work, single-phase Li₃V₂(PO₄)₃ powders were synthesized by the solution combustion route using cetyltrimethylammonium bromide (CTAB) and/or polyvinyl pyrrolidine (PVP) as organic fuel following calcination at above 750 °C. The large Li₃V₂(PO₄)₃ particles were dispersed in a carbon substrate, which was obtained by thermally decomposing the CTAB and PVP fuels as a carbon source. Furthermore, there was a carbon layer on Li₃V₂(PO₄)₃ particles with an average thickness of 12 and 5 nm for CTAB and PVP, respectively. The CTAB-assisted Li₃V₂(PO₄)₃/C powders showed a higher charge storage capability, including a higher discharge specific capacity of 110 mAh g−1 at 0.1C, higher rate capability, and higher capacity retention of 99 % at 1C for 200 charge/discharge cycles. The higher electrochemical performance was attributed to the higher crystallinity, higher graphitization of the carbon layer, and lower charge transfer resistance caused by the CTAB fuel.
Enhanced lithium storage in Fe-doped Li3V2(PO4)3–Li3PO4/C composite cathodes
Mebrahtom Gebresemati Weldehans,Hye-Jung Park,Hyomin Lee,Jaehyun Hur,Il Tae Kim +4 more
Li3V2(PO4)3-Based Cathode Materials for Li-Ion Batteries: Time Evolution of the Vanadium Valence State
A.R. Yagfarova,I. V. Yatsyk,D. V. Mamedov,Yu.А. Deeva,A. M. Uporova,Т. И. Чупахина,S. M. Khantimerov,Т. П. Гаврилова +7 more
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