A melt-diffusion strategy for tunable sulfur loading on CC@MoS2 for lithium–sulfur batteries
For lithium–sulfur batteries, 3D cathodes might be of interest for containing the active material and trapping the polysulfides during cycling, owing to their binder-free and freestanding features. In this work, the MoS2 grown on the 3D structured Carbon Cloth (CC@MoS2) is firstly used to fabricate...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-12-01
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| Series: | Energy Reports |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484720302614 |
| _version_ | 1818599664718446592 |
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| author | Chengxiang Tian Juwei Wu Zheng Ma Bo Li Xu Zhang Xiaotao Zu Xia Xiang Sean Li |
| author_facet | Chengxiang Tian Juwei Wu Zheng Ma Bo Li Xu Zhang Xiaotao Zu Xia Xiang Sean Li |
| author_sort | Chengxiang Tian |
| collection | DOAJ |
| description | For lithium–sulfur batteries, 3D cathodes might be of interest for containing the active material and trapping the polysulfides during cycling, owing to their binder-free and freestanding features. In this work, the MoS2 grown on the 3D structured Carbon Cloth (CC@MoS2) is firstly used to fabricate the Li–S battery and the sulfur loading can be freely tuned by adjusting thermal annealing time at 200 °C. A two-step melt-diffusion strategy is reported for fabrication of cathodes, which involves in melting and diffusion of sulfur covered by CC@MoS2 composites instead of dissolution of sulfur in the toxic organic solvents. Compared with the non-polar carbon cloth, the CC@MoS2 composites exhibit better adsorption capacity for polysulfides due to more edge active sites, which could effectively facilitate polysulfide redox kinetics. The SEM images of the CC@MoS2 cathode after 300 cycles show that MoS2 can still maintain the nanosheet morphology. After 300 cycles at 0.5 C, the CC@MoS2 cathodes loaded with 2 mg sulfur exhibit a better reversible capacity of 698 mA h g−1 compared with CC@MoS2 loaded with 1 mg sulfur (604 mA h g−1) and CC@MoS2 loaded with 4 mg sulfur (420 mA h g−1). This work proposes an environmentally friendly method to fabricate the lithium–sulfur battery cathode material and the sulfur loading can be freely adjusted. |
| first_indexed | 2024-12-16T12:23:12Z |
| format | Article |
| id | doaj.art-1fa0d174efab4701a42c2570688940a9 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-12-16T12:23:12Z |
| publishDate | 2020-12-01 |
| publisher | Elsevier |
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| series | Energy Reports |
| spelling | doaj.art-1fa0d174efab4701a42c2570688940a92022-12-21T22:31:54ZengElsevierEnergy Reports2352-48472020-12-016172180A melt-diffusion strategy for tunable sulfur loading on CC@MoS2 for lithium–sulfur batteriesChengxiang Tian0Juwei Wu1Zheng Ma2Bo Li3Xu Zhang4Xiaotao Zu5Xia Xiang6Sean Li7School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, ChinaSchool of Physics, University of Electronic Science and Technology of China, Chengdu 610054, ChinaSchool of Physics, University of Electronic Science and Technology of China, Chengdu 610054, ChinaSchool of Physics, University of Electronic Science and Technology of China, Chengdu 610054, ChinaSchool of Physics, University of Electronic Science and Technology of China, Chengdu 610054, ChinaSchool of Physics, University of Electronic Science and Technology of China, Chengdu 610054, ChinaSchool of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China; Corresponding authors.School of Materials Science and Engineering, The University of New South Wales, Sydney NSW 2052, Australia; Corresponding authors.For lithium–sulfur batteries, 3D cathodes might be of interest for containing the active material and trapping the polysulfides during cycling, owing to their binder-free and freestanding features. In this work, the MoS2 grown on the 3D structured Carbon Cloth (CC@MoS2) is firstly used to fabricate the Li–S battery and the sulfur loading can be freely tuned by adjusting thermal annealing time at 200 °C. A two-step melt-diffusion strategy is reported for fabrication of cathodes, which involves in melting and diffusion of sulfur covered by CC@MoS2 composites instead of dissolution of sulfur in the toxic organic solvents. Compared with the non-polar carbon cloth, the CC@MoS2 composites exhibit better adsorption capacity for polysulfides due to more edge active sites, which could effectively facilitate polysulfide redox kinetics. The SEM images of the CC@MoS2 cathode after 300 cycles show that MoS2 can still maintain the nanosheet morphology. After 300 cycles at 0.5 C, the CC@MoS2 cathodes loaded with 2 mg sulfur exhibit a better reversible capacity of 698 mA h g−1 compared with CC@MoS2 loaded with 1 mg sulfur (604 mA h g−1) and CC@MoS2 loaded with 4 mg sulfur (420 mA h g−1). This work proposes an environmentally friendly method to fabricate the lithium–sulfur battery cathode material and the sulfur loading can be freely adjusted.http://www.sciencedirect.com/science/article/pii/S2352484720302614lithium–sulfur batteriesCarbon clothMoS2Two-step melt-diffusion strategyPolysulfides |
| spellingShingle | Chengxiang Tian Juwei Wu Zheng Ma Bo Li Xu Zhang Xiaotao Zu Xia Xiang Sean Li A melt-diffusion strategy for tunable sulfur loading on CC@MoS2 for lithium–sulfur batteries Energy Reports lithium–sulfur batteries Carbon cloth MoS2 Two-step melt-diffusion strategy Polysulfides |
| title | A melt-diffusion strategy for tunable sulfur loading on CC@MoS2 for lithium–sulfur batteries |
| title_full | A melt-diffusion strategy for tunable sulfur loading on CC@MoS2 for lithium–sulfur batteries |
| title_fullStr | A melt-diffusion strategy for tunable sulfur loading on CC@MoS2 for lithium–sulfur batteries |
| title_full_unstemmed | A melt-diffusion strategy for tunable sulfur loading on CC@MoS2 for lithium–sulfur batteries |
| title_short | A melt-diffusion strategy for tunable sulfur loading on CC@MoS2 for lithium–sulfur batteries |
| title_sort | melt diffusion strategy for tunable sulfur loading on cc mos2 for lithium sulfur batteries |
| topic | lithium–sulfur batteries Carbon cloth MoS2 Two-step melt-diffusion strategy Polysulfides |
| url | http://www.sciencedirect.com/science/article/pii/S2352484720302614 |
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