TiO2 coated three-dimensional hierarchically ordered porous sulfur electrode for the lithium/sulfur rechargeable batteries

Hongqiang Wang; Sha Li; Dan Li; Zhixin Chen; Hua Kun Liu; Zaiping Guo

doi:10.1016/j.energy.2014.08.029

TiO₂ coated three-dimensional hierarchically ordered porous sulfur electrode for the lithium/sulfur rechargeable batteries

Hongqiang Wang, Sha Li, Dan Li, Zhixin Chen, Hua Kun Liu, Zaiping Guo^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

52 Citations (Scopus)

Abstract

A three-dimensional (3D) hierarchically ordered mesoporous carbon-sulfur composite slice coated with a thin TiO₂ layer has been synthesized by a low-cost process and investigated as a cathode for the lithium-sulfur batteries. The TiO₂ coated carbon sulfur composite thin slice works as a binder-free cathode without any current collectors for lithium-sulfur batteries. The hierarchical architecture provides a 3D conductive network for electron transfer, open channels for ion diffusion and strong confinement of soluble polysulfides. Meanwhile, TiO₂ (titanium dioxide) coating layer could further effectively prevent the dissolution of polysulfides and also improve the strength of the entire electrode, thereby enhancing the electrochemical performance. As a result, after TiO₂ coating, the electrode demonstrates excellent cycling performance, with a discharge capacity of 608mAh/g at 0.2 C current rate and 500mAh/g at 1 C current rate after 120 cycles, respectively. © 2014.

Original language	English
Pages (from-to)	597-602
Journal	Energy
Volume	75
DOIs	https://doi.org/10.1016/j.energy.2014.08.029
Publication status	Published - 1 Oct 2014
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.

Funding

Financial support provided by the Australian Research Council (ARC) through an ARC Discovery project ( DP1094261 ) is gratefully acknowledged.

Research Keywords

3D architecture
Binder-free
Mass production
Ordered mesoporous structure

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Cite this

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title = "TiO2 coated three-dimensional hierarchically ordered porous sulfur electrode for the lithium/sulfur rechargeable batteries",

abstract = "A three-dimensional (3D) hierarchically ordered mesoporous carbon-sulfur composite slice coated with a thin TiO2 layer has been synthesized by a low-cost process and investigated as a cathode for the lithium-sulfur batteries. The TiO2 coated carbon sulfur composite thin slice works as a binder-free cathode without any current collectors for lithium-sulfur batteries. The hierarchical architecture provides a 3D conductive network for electron transfer, open channels for ion diffusion and strong confinement of soluble polysulfides. Meanwhile, TiO2 (titanium dioxide) coating layer could further effectively prevent the dissolution of polysulfides and also improve the strength of the entire electrode, thereby enhancing the electrochemical performance. As a result, after TiO2 coating, the electrode demonstrates excellent cycling performance, with a discharge capacity of 608mAh/g at 0.2 C current rate and 500mAh/g at 1 C current rate after 120 cycles, respectively. {\textcopyright} 2014.",

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T1 - TiO2 coated three-dimensional hierarchically ordered porous sulfur electrode for the lithium/sulfur rechargeable batteries

AU - Wang, Hongqiang

AU - Li, Sha

AU - Li, Dan

AU - Chen, Zhixin

AU - Liu, Hua Kun

AU - Guo, Zaiping

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.

PY - 2014/10/1

Y1 - 2014/10/1

N2 - A three-dimensional (3D) hierarchically ordered mesoporous carbon-sulfur composite slice coated with a thin TiO2 layer has been synthesized by a low-cost process and investigated as a cathode for the lithium-sulfur batteries. The TiO2 coated carbon sulfur composite thin slice works as a binder-free cathode without any current collectors for lithium-sulfur batteries. The hierarchical architecture provides a 3D conductive network for electron transfer, open channels for ion diffusion and strong confinement of soluble polysulfides. Meanwhile, TiO2 (titanium dioxide) coating layer could further effectively prevent the dissolution of polysulfides and also improve the strength of the entire electrode, thereby enhancing the electrochemical performance. As a result, after TiO2 coating, the electrode demonstrates excellent cycling performance, with a discharge capacity of 608mAh/g at 0.2 C current rate and 500mAh/g at 1 C current rate after 120 cycles, respectively. © 2014.

AB - A three-dimensional (3D) hierarchically ordered mesoporous carbon-sulfur composite slice coated with a thin TiO2 layer has been synthesized by a low-cost process and investigated as a cathode for the lithium-sulfur batteries. The TiO2 coated carbon sulfur composite thin slice works as a binder-free cathode without any current collectors for lithium-sulfur batteries. The hierarchical architecture provides a 3D conductive network for electron transfer, open channels for ion diffusion and strong confinement of soluble polysulfides. Meanwhile, TiO2 (titanium dioxide) coating layer could further effectively prevent the dissolution of polysulfides and also improve the strength of the entire electrode, thereby enhancing the electrochemical performance. As a result, after TiO2 coating, the electrode demonstrates excellent cycling performance, with a discharge capacity of 608mAh/g at 0.2 C current rate and 500mAh/g at 1 C current rate after 120 cycles, respectively. © 2014.

KW - 3D architecture

KW - Binder-free

KW - Mass production

KW - Ordered mesoporous structure

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U2 - 10.1016/j.energy.2014.08.029

DO - 10.1016/j.energy.2014.08.029

M3 - RGC 21 - Publication in refereed journal

SN - 0360-5442

VL - 75

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EP - 602

JO - Energy

JF - Energy

ER -