Geng, Xianwei, Yi, Ruowei, Lin, Xiangfei, Liu, Chenguang, Sun, Yi, Zhao, Yingchao, Li, Yinqing, Mitrovic, Ivona 
ORCID: 0000-0003-4816-8905, Liu, Rui, Yang, Li et al (show 1 more authors)
(2021)
A high conductive TiC–TiO2/SWCNT/S composite with effective polysulfides adsorption for high performance Li–S batteries.
Journal of Alloys and Compounds, 851.
p. 156793.
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JALCOM_Geng et al-2021-accepted version.pdf - Author Accepted Manuscript Download (1MB) | Preview |
Abstract
Lithium-sulfur (Li–S) batteries have attracted more and more attention in recent years, as their theoretical capacity is several times larger than conventional lithium-ion batteries and they have a high energy density in secondary battery systems. In our work, a titanium carbide - titanium dioxide/single-walled carbon nanotube/sulfur (TiC–TiO2/SWCNT/S) cathode with high conductivity and effective polysulfides adsorption is prepared by a facile method for fabricating Li–S batteries. The batteries with this composite cathode show a good performance at 0.1 C due to relatively high utilization of sulfur, reaching 1338.6 mAh·g−1 specific capacity at first cycle and retaining 802.5 mAh·g−1 after 100 cycles. Meanwhile, it presents an excellent rate performance with 711.2 mAh·g−1 at 4 C, and recovers to 1006.9 mAh·g−1 when the current returns to 0.1 C. Also a slow capacity decay (0.045% decay rate per cycle) is observed at 1 C. These results suggest that a small amount of SWCNT can increase the conductivity of the whole composite to a great extent, and the strong adsorption ability of TiO2 increases the cycle life. This work offers an efficient and low-cost strategy to obtain high performance batteries with great potential for commercial applications.
| Item Type: | Article |
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| Uncontrolled Keywords: | Lithium-sulfur batteries, Titanium carbide, Titanium dioxide, Single-walled carbon nanotube |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 07 Oct 2020 14:24 |
| Last Modified: | 18 Jan 2023 23:29 |
| DOI: | 10.1016/j.jallcom.2020.156793 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3103818 |
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