Tuning the carbon content on TiO2 nanosheets for optimized sodium storage

Wen, Yanfen, Yun, Jung-Ho, Luo, Bin, Lyu, Miaoqiang and Wang, Lianzhou (2016) Tuning the carbon content on TiO2 nanosheets for optimized sodium storage. Electrochimica Acta, 219 163-169. doi:10.1016/j.electacta.2016.09.153


Author Wen, Yanfen
Yun, Jung-Ho
Luo, Bin
Lyu, Miaoqiang
Wang, Lianzhou
Title Tuning the carbon content on TiO2 nanosheets for optimized sodium storage
Formatted title
Tuning the carbon content on TiO2 nanosheets for optimized sodium storage
Journal name Electrochimica Acta   Check publisher's open access policy
ISSN 0013-4686
1873-3859
Publication date 2016-11-20
Sub-type Article (original research)
DOI 10.1016/j.electacta.2016.09.153
Open Access Status Not yet assessed
Volume 219
Start page 163
End page 169
Total pages 7
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
Formatted abstract
Titanium dioxide (TiO2) has been considered as a promising anode candidate for sodium ion batteries (NIBs). In this work, we report the synthesis of anatase TiO2 nanosheets coated by nitrogen doped carbon derived from dopamine precursor (TiO2@C) as high performance anode materials for NIBs applications. The carbon contents can be controlled from 2.6 wt% to 10.4 wt% by varying the polymerization time of dopamine. X-ray diffraction patterns confirm there is no phase change after carbon coating. When employed as an anode for NIBs, the TiO2@C composites exhibit improved electrochemical performances in terms of higher specific capacity and better cycling stability compared to pure TiO2 nanosheets. Notably, with a carbon content of 4.8 wt%, the TiO2@C nanosheets delivers a reversible capacity of 180 mA h g−1 and shows stable cycling performance with no discharge capacity decay from 2nd cycle onward over 50 cycles. Even at high current density of 10C, the capacity still remains 82 mA h g−1. The excellent cycling stability and rate performances can be ascribed to the protective effects of carbon coating layer which reserves the structure stability and enhances electrical conductivity during cycling.
Keyword Anode
Carbon coating
Sodium storage
TiO2 nanosheets
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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