A three-dimensional cathode matrix with bi-confinement effect of polysulfide for lithium-sulfur battery
| Autor: | Tiantian Gao, Bo Wang, Rensheng Song, Lei Wang, Hao Luo, Tingting Ruan, Fei Wang, Dianlong Wang |
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| Rok vydání: | 2018 |
| Předmět: |
Battery (electricity)
Materials science Inorganic chemistry General Physics and Astronomy chemistry.chemical_element Lithium–sulfur battery 02 engineering and technology Carbon nanotube 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound law Polysulfide Graphene Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Sulfur Cathode 0104 chemical sciences Surfaces Coatings and Films chemistry 0210 nano-technology Mesoporous material |
| Zdroj: | Applied Surface Science. 427:396-404 |
| ISSN: | 0169-4332 |
| Popis: | Soluble polysulfide shuttling is still the main cause of restricting the development of lithium-sulfur (Li-S) battery. Here, we propose a novel three-dimensional reduced graphene oxide@sulfur/nitrogen-doped porous carbon polyhedron/carbon nanotubes (rGO@S/NCP/CNTs) composite with bi-confinement effect of polysulfide as an effective cathode material. In rGO@S/NCP/CNTs, NCP provides physical confinement for sulfur and soluble polysulfide by its abundant micropores and mesopores, while oxygen functional groups of rGO provide strong chemical confinement to soluble polysulfide. Additionally, CNTs with one-dimensional conductivity enable facile transport of electrons. Therefore, the resulting rGO@S/NCP/CNTs composite shows an obvious enhancement in cycling performance for Li-S battery, and reversible capacities up to 738 mAh g −1 and 660 mAh g −1 over 100 and 200 cycles are remained at 0.2 C rate. |
| Databáze: | OpenAIRE |
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