Effects of Active Material Particles Size Distribution on the Fabrication of TiNb2O7 Electrode Used in Lithium-Ion Batteries

Journal of Advanced Materials and Processing

دوره 9، شماره 3، آبان 2021، صفحه 15-22   

نوع مقاله: Research Paper

نویسندگان

Touraj Adhami¹؛ Reza Ebrahimi-Kahrizsangi^{* 1}؛ Hamid Reza Bakhsheshi Rad^{* 1}؛ Somayeh Majidi²؛ Milad Ghorbanzadeh³

¹Advanced Materials Research Center, Materials Engineering Department, Najafabad Branch, Islamic Azad University, Najafabad, Iran

²Department of Chemistry, Najafabad Branch, Islamic Azad University, Najafabad, Iran

³Materials and Energy Research Center, Karaj, Iran

چکیده

 
In this study effect of active material particle size distribution (PSD) on TiNb₂O₇ electrodes and their performance were evaluated. To determine the effect of PSD, have focused on the performance of the electrode, which is mainly affected by the performance of individual particles and their interaction. For this purpose, TiNb₂O₇ was successfully synthesized by mechanochemical method and post-annealing, as an anode material for lithium-ion batteries. Phase identifications and microstructure characterization was carried out by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) to identify the phases and evaluate the morphology of the synthesized samples. The charging and discharging tests were conducted using a battery-analyzing device for evaluating the electrochemical properties of the fabricated anodes. Eventually, at faster charging rates, the electrochemical performance was found to be improved when smaller active material particle size distribution was used. Differences in particles size distributions resulted in variable discharge capacities so that the sample with particle size higher than 25 microns (>25 μm) showed a capacity of 19 mAh/g after 179 cycles, which had a lower capacity than their sample with particle size less than 25 microns (<25 μm). The final capacity of the sample with a particle size less than 25 microns is 72 mAh/g.

کلیدواژه‌ها

Anode materials؛ particle size؛ uniform distribution؛ Li ion battery؛ electrode

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