Batteries, Volume (6), No (4), Year (2020-10) , Pages (51-51)

Title : ( Directly Anodized Sulfur-Doped TiO2 Nanotubes as Improved Anodes for Li-ion Batteries )

Authors: davood sabaghi , Mahmoud Madian , Ahmad Omar , Steffen Oswald , Margitta Uhlemann , Morteza Maghrebi , Majid Baniadam , Daria Mikhailova ,

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Abstract

TiO2 represents one of the promising anode materials for lithium ion batteries due to its high thermal and chemical stability, relatively high theoretical specific capacity and low cost. However, the electrochemical performance, particularly for mesoporous TiO2, is limited and must be further developed. Elemental doping is a viable route to enhance rate capability and discharge capacity of TiO2 anodes in Li-ion batteries. Usually, elemental doping requires elevated temperatures, which represents a challenge, particularly for sulfur as a dopant. In this work, S-doped TiO2nanotubes were successfully synthesized in situ during the electrochemical anodization of a titanium substrate at room temperature. The electrochemical anodization bath represented an ethylene glycol-based solution containing NH4F along with Na2S2O5 as the sulfur source. The S-doped TiO2 anodes demonstrated a higher areal discharge capacity of 95 µAh·cm−2 at a current rate of 100 µA·cm−2 after 100 cycles, as compared to the pure TiO2 nanotubes (60 µAh·cm−2). S-TiO2 also exhibited a significantly improved rate capability up to 2500 µA. cm−2 as compared to undoped TiO2. The improved electrochemical performance, as compared to pure TiO2 nanotubes, is attributed to a lower impedance in S-doped TiO2 nanotubes (STNTs). Thus, the direct S-doping during the anodization process is a promising and cost-effective route towards improved TiO2 anodes for Li-ion batteries.

Keywords

, doped TiO2, nanotubes; in, situ sulfur doping; titanium anodization
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@article{paperid:1081797,
author = {Sabaghi, Davood and Mahmoud Madian and Ahmad Omar and Steffen Oswald and Margitta Uhlemann and Maghrebi, Morteza and Baniadam, Majid and Daria Mikhailova},
title = {Directly Anodized Sulfur-Doped TiO2 Nanotubes as Improved Anodes for Li-ion Batteries},
journal = {Batteries},
year = {2020},
volume = {6},
number = {4},
month = {October},
issn = {2313-0105},
pages = {51--51},
numpages = {0},
keywords = {doped TiO2-nanotubes; in-situ sulfur doping; titanium anodization},
}

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%0 Journal Article
%T Directly Anodized Sulfur-Doped TiO2 Nanotubes as Improved Anodes for Li-ion Batteries
%A Sabaghi, Davood
%A Mahmoud Madian
%A Ahmad Omar
%A Steffen Oswald
%A Margitta Uhlemann
%A Maghrebi, Morteza
%A Baniadam, Majid
%A Daria Mikhailova
%J Batteries
%@ 2313-0105
%D 2020

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