@conference{
author = "Latas, Nemanja and Rajić, Vladimir and Jugović, Dragana and Cvjetićanin, Nikola",
year = "2023",
abstract = "Lithium-ion batteries (LIBs) are the most promising energy storage devices on the market today. Their importance is reflected in the fact that LIBs power numerous portable devices and that they are being developed for electric and hybrid electric vehicles [1]. Most commercial LIBs are composed of a graphite anode, which cannot meet high performace requirements [2]. Several transition metal-oxide based hosts have been considered as potential alternatives to the graphite anode, including TiO2. Low cost, high Li-ion insertion potential, low volume expansion and good cycling life make TiO2 a promising anode material. Different polymorphs of TiO2 have been investigated, and preference is given to the anatase phase. Herein, anatase TiO2 nanotube arrays (NTAs) electrode was preapred by anodic oxidation of Ti-foil and subesquent annealing at 400 oC. SEM micrographs show that the nanotubes (NTs) are cylindrical in shape, with an average inner diameter of about 95 nm and wall thickness ~15 nm. In the Raman spectrum, five active modes which correspond to the anatase phase are present. XRD pattern of as-prepared Ti/TiO2 NTAs electrode was recorded, and the strongest diffraction maximum of anatase phase was used for the claculation of the mean crystallite size. The obtained value is 19 ± 1 nm. Electrochemical experiments, which included cyclic voltammery (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic (GS) cycling, were carried out using a termostat in the temperature range from 25 – 55 oC. The 1 M solution of LiClO4 in propylene carbonate was used as an electrolyte in all cases. CV experiments demonstrated an increase in the redox peak intensity and a decrease in peak-to-peak separation at higher temperatures, indicating improvement in Li-ion storage capability and better reversibilty of Li-ion intercalation/deintercalation process. GS cycling showed a large Li-ion insertion capacity of Ti/TiO2 NTAs electrode, high Coulombic efficiency (CE) and good capcity retention. Lithiation capacity at 55 oC attains 357 mAh·g-1 at current rate 5.3 C, with CE of 97.5% and capacity retention of 98.5% after 50 cycles. EIS showed with increasing temperature a multifold decrease in solid electrolyte interphase (SEI) layer resistance and charge transfer resistance. EDS and FTIR spectra of Ti/TiO2 NTAs electrode were recorded to better underastand the nature of the formed SEI film.",
publisher = "Belgrade : Serbian Chemical Society, Belgrade : Serbian Young Chemists Club",
journal = "Book of abstracts / 9th Conference of the Young Chemists of Serbia, 4th November 2023, Novi Sad",
title = "Electrochemical study of Li-ion intercalation into anatase TiO2 nanotubes at different temperatures",
pages = "160-160",
url = "https://hdl.handle.net/21.15107/rcub_dais_16167"
}
