Electrochemical performance of novel Li3V2(PO4)3 glass-ceramic nanocomposites as electrodes for energy storage devices |
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| Authors: | M. M. El-Desoky A. M. Al-Syadi M. S. Al-Assiri Hassan M. A. Hassan Gaber El Enany |
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| Affiliation: | 1.Physics Department, Faculty of Science,Suez University,Suez,Egypt;2.Physics Department, Faculty of Education,Ibb University,Al-Nadirah,Yemen;3.Physics Department, College of Science and Arts,Najran University,Najran,Saudi Arabia;4.Promising Center for Sensors and Electronic Devices (PCSED),Najran University,Najran,Saudi Arabia;5.Chemistry Department, Faculty of Science,Suez University,Suez,Egypt;6.Scientific Department, Faculty of Engineering,Port Said University,Port Said,Egypt |
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| Abstract: | The novel Li3V2(PO4)3 glass-ceramic nanocomposites were synthesized and investigated as electrodes for energy storage devices. They were fabricated by heat treatment (HT) of 37.5Li2O–25V2O5–37.5P2O5?mol% glass at 450 °C for different times in the air. XRD, SEM, and electrochemical methods were used to study the effect of HT time on the nanostructure and electrochemical performance for Li3V2(PO4)3 glass-ceramic nanocomposites electrodes. XRD patterns showed forming Li3V2(PO4)3 NASICON type with monoclinic structure. The crystalline sizes were found to be in the range of 32–56 nm. SEM morphologies exhibited non-uniform grains and changed with variation of HT time. The electrochemical performance of Li3V2(PO4)3 glass-ceramic nanocomposites was investigated by using galvanostatic charge/discharge methods, cyclic voltammetry, and electrochemical impedance spectroscopy in 1 M H2SO4 aqueous electrolyte. The glass-ceramic nanocomposites annealed for 4 h, which had a lower crystalline size, exhibited the best electrochemical performance with a specific capacity of 116.4 F g?1 at 0.5 A g?1. Small crystalline size supported the lithium ion mobility in the electrode by decreasing the ion diffusion pathway. Therefore, the Li3V2(PO4)3 glass-ceramic nanocomposites can be promising candidates for large-scale industrial applications in high-performance energy storage devices. |
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