Polycarboxylate Functionalized Graphene/S Composite Cathodes and Modified Cathode-Facing Side Coated Separators for Advanced Lithium-Sulfur Batteries
| Autor: | Huseyin Kizil, Maryam Sadat Kiai, Omer Eroglu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Nanochemistry chemistry.chemical_element Separator (oil production) Lithium–sulfur battery 02 engineering and technology 010402 general chemistry Electrochemistry 01 natural sciences Sulfur host material law.invention law Polysulfides lcsh:TA401-492 General Materials Science Nano Express Doping 021001 nanoscience & nanotechnology Condensed Matter Physics Sulfur Cathode 0104 chemical sciences Lithium-sulfur battery Chemical engineering chemistry Chemisorption lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology Polycarboxylate functionalized graphene cathode |
| Zdroj: | Nanoscale Research Letters Nanoscale Research Letters, Vol 14, Iss 1, Pp 1-11 (2019) |
| ISSN: | 1556-276X 1931-7573 |
| Popis: | Sulfur-hosting novel materials as a cathode for lithium-sulfur batteries are in the focus of many research to enhance the specific capacity and cycling stability. Herein, we developed composite cathodes consisting of polycarboxylate functionalized graphene (PC-FGF) doped with TiO2 nanoparticles or poly1,5-diaminoanthraquinone (PDAAQ) and sulfur to enhance chemisorption property toward polysulfides. Additionally, PC-FGF/sulfur composite cathode functions as an efficient trapping site for polysulfides spices as well as contributes to facilitate electron and Li-ions movement toward or from the cathode. In the first experiment, the cell with sulfur incorporated TiO2/PC-FGF cathode is assembled with three different cathode-facing side-coated glass fiber separators. At the second test, PDAAQ/PC-FGF cathode is assembled with the same separator materials as before. The best electrochemical performance observed was sulfur incorporated TiO2/PC-FGF cathode with PDAAQ/PC-FGF-coated separator having a high discharge capacity of 1100 mAh g− 1 at 0.5 C after 100 cycles. It is found that the combination of TiO2/PC-FGF/sulfur cathode and PDAAQ/PC-FCF separator could serve as promising cathode and separator material due to high cycling stability and rate capability for advanced Li-S batteries. |
| Databáze: | OpenAIRE |
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