Cost-effective porous carbon materials synthesized by carbonizing rice husk and K2CO3 activation and their application for lithium-sulfur batteries
| Autor: | Dang Chinh Huynh, Nae-Li Wu, Thanh-Tung Mai, Duc-Luong Vu, Anh-Tuan Le |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Materials Science (miscellaneous) chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Husk law.invention Biomaterials law medicine lcsh:TA401-492 Porosity Carbonization 021001 nanoscience & nanotechnology Sulfur Cathode 0104 chemical sciences Electronic Optical and Magnetic Materials Chemical engineering chemistry Ceramics and Composites lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology Porous medium Current density Activated carbon medicine.drug |
| Zdroj: | Journal of Science: Advanced Materials and Devices, Vol 4, Iss 2, Pp 223-229 (2019) |
| ISSN: | 2468-2179 |
| Popis: | In this work, we developed highly porous activated carbon (AC) materials with micro/meso porosity through carbonizing rice husk and treating them with K2CO3. Elemental sulfur was then loaded to the micropores through a solution infiltration method to form rice husk-derived activated carbon (RHAC)@S composite materials. The as-prepared RHAC@S composites with 0.25 mg cm−1 and 0.38 mg cm−1 of sulfur loading were tested as cathodes for lithium-sulfur (Li-S) batteries. The 0.25 mg cm−1 sulfur loaded sample showed an initial discharge capacity of 1080 mA h/g at a 0.1 C rate. After 50 cycles of charge/discharge tests at the current density of 0.2 C, the reversible capacity is maintained at 312 mA h/g. The RHAC material delivered a capacity of more than 300 mA h/g at a current density of 1.7 C. These results demonstrate that the RHAC porous materials are very promising as cathode materials for the development of high-performance Li-S batteries. Keywords: Rice husk, Cathode material, Carbonization process, Activated carbon, Lithium-sulfur batteries |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|