A binder-free lithium-sulfur battery cathode using three-dimensional porous g-C3N4 nanoflakes as sulfur host displaying high binding energies with lithium polysulfides
| Autor: | Haikuo Zhang, Mengfei Zhu, Chaoquan Hu, Jinjin Li, Xirong Lin, Tianli Han, Jinyun Liu, Xiaoyong Xu |
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| Rok vydání: | 2021 |
| Předmět: |
Battery (electricity)
Materials science Mechanical Engineering Metals and Alloys chemistry.chemical_element Lithium–sulfur battery 02 engineering and technology Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Sulfur Cathode 0104 chemical sciences law.invention Chemical engineering chemistry Polymerization Mechanics of Materials law Materials Chemistry Lithium 0210 nano-technology Carbon |
| Zdroj: | Journal of Alloys and Compounds. 881:160629 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2021.160629 |
| Popis: | A binder-free porous graphene like-C3N4 nanoflakes/carbon cloth/sulfur lithium-sulfur battery cathode prepared through a thermal polymerization method is presented. On the basis of the density functional theory calculations on the bonds between g-C3N4 and lithium polysulfides including Li2S4, Li2S6 and Li2S8, it is found the cathode possesses robust binding energies towards polysulfides and an improved conductivity, which would enable a strong suppression for the transfer of the lithium polysulfides. The prepared porous binder-free cathode exhibits a high capacity of 892 mAh g−1 after cycling 250 times at 0.2 C and a well-recoverable rate-performance, which indicates a good potential to construct high-performance lithium-sulfur batteries for practical applications. |
| Databáze: | OpenAIRE |
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