Enhanced electrochemical efficiency of lithium-ion battery using titanium and rhenium adatoms by the application of square wave potential regime

Alkhawaldeh, Ahmad Khalaf; Alhasan, Huda S.

doi:10.21608/ejchem.2022.117555.5538

Enhanced electrochemical efficiency of lithium-ion battery using titanium and rhenium adatoms by the application of square wave potential regime

Document Type : Original Article

Authors

¹ Department of Medical Allied Sciences, Zarqa University College, Al-Balqa Applied University, Jordan.

² Environmental Research and Studies Center, University of Babylon, Hilla 51002, Babylon -Iraq

10.21608/ejchem.2022.117555.5538

Abstract

A new approach for the modification of the Li-ion battery cathode by titanium (Ti3+) and rhenium (Re3+) monolayers using a square wave potential regime has been established. Cyclic voltammetry (CV), Energy-dispersive X-ray spectroscopy (EDX) and Chronoamperometric (CA) were used to analyze the electrochemical properties of these cathodes. The EDX indicates that the active material's powder parts have been fully coated with a thick and homogenous coating from titanium and rhenium after the application of square wave potential. The lower/upper limit potential allowing spontaneous monolayer coating of the lithium surface. This fundamental change has a significant impact on charge-discharge efficiency. Information about local Ti/Re and Li-ions arrangements was obtained from EDX spectra. The CV studies confirm the presence of the coating process in the studied samples and rule out the possibility of Ti+3/Re+3 ion diffusion through the structure. Our research also reveals that while coating layers cannot help achieve optimal electrochemical characteristics, they can help to hinder power retention depending on the coating system and conditions. The constructed surfaces were exposed to 1x10-3 M of Ti3+/Re3+ solution, causing Ti/Re atoms to be permanently adsorbed at the lithium surfaces, resulting in Lisur-Tiad/Lisur-Read surfaces. The lithium-ion surface modified by titanium and rhenium adatoms had greater capacity power than the lithium-ion surface pure. This demonstrates the synergistic effects of Ti3+ and Re3+ adatoms in imparting higher electrochemistry properties to lithium-ion batteries.

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