Oxygen-deficient titanium dioxide as a functional host for lithium-sulfur batteries

Wang, Hong-En1; Yin, Kaili1; Qin, Ning3; Zhao, Xu4; Xia, Fan-Jie1; Hu, Zhi-Yi1; Guo, Guanlun6; Cao, Guozhong5; Zhang, Wenjun2

2019-05-07

10.1039/c9ta01598a

Journal of Materials Chemistry A   影响因子和分区

2050-7488

2050-7496

The shuttling of polysulfides with sluggish redox kinetics has severely retarded the advancement of lithium-sulfur Li-S) batteries. In this work oxygen-deficient titanium dioxide (TiO2) has been investigated as a novel functional host for Li-S batteries. Experimental and first-principles density functional theory (DFT) studies reveal that oxygen vacancies (V-o) help to reduce polysulfide shuttling and catalyze the redox kinetics of sulfur/polysulfides during cycling. Consequently, the resulting TiO2/S composite cathode manifests superior electrochemical properties in terms of high capacity (1472 mA h g(-1) at 0.2C), outstanding rate capability (571 mA h g(-1) at 2C), and excellent cycling properties (900 mA h g(-1) over 100 cycles at 0.2C). The present strategy offers a viable way through vacancy engineering for the design and optimization of high-performance electrodes for advanced Li-S batteries and other electrochemical devices.

SCI ; EI

英语

其他

National Science Foundation[1803256]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000472183200019

ROYAL SOC CHEMISTRY

20191806864632

Cathodes ; Density functional theory ; Design for testability ; Lithium batteries ; Lithium compounds ; Polysulfides ; Secondary batteries ; Sulfur dioxide ; Titanium dioxide

Primary Batteries:702.1.1 ; Secondary Batteries:702.1.2 ; Inorganic Compounds:804.2 ; Organic Polymers:815.1.1 ; Probability Theory:922.1 ; Crystalline Solids:933.1

Web of Science

1.Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Hubei, Peoples R China
2.City Univ Hong Kong, COSDAF, Dept Mat Sci & Engn, Hong Kong, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.China Acad Engn Phys, Inst Chem Mat, Mianyang 621900, Sichuan, Peoples R China
5.Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA
6.Wuhan Univ Technol, Hubei Key Lab Adv Technol Automot Components, Wuhan 430070, Hubei, Peoples R China

Wang, Hong-En,Yin, Kaili,Qin, Ning,et al. Oxygen-deficient titanium dioxide as a functional host for lithium-sulfur batteries[J]. Journal of Materials Chemistry A,2019,7(17):10346-10353.

Wang, Hong-En.,Yin, Kaili.,Qin, Ning.,Zhao, Xu.,Xia, Fan-Jie.,...&Zhang, Wenjun.(2019).Oxygen-deficient titanium dioxide as a functional host for lithium-sulfur batteries.Journal of Materials Chemistry A,7(17),10346-10353.

Wang, Hong-En,et al."Oxygen-deficient titanium dioxide as a functional host for lithium-sulfur batteries".Journal of Materials Chemistry A 7.17(2019):10346-10353.