Activated carbon with hierarchical micro–mesoporous structure obtained from rice husk and its application for lithium–sulfur batteries
| Autor: | Jae-Won Lee, Ha-Yan Lee, Duc-Luong Vu, Jae-Sung Seo |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Carbonization General Chemical Engineering Composite number chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Sulfur Husk Cathode 0104 chemical sciences law.invention chemistry Chemical engineering law medicine Lithium sulfur 0210 nano-technology Mesoporous material Activated carbon medicine.drug |
| Zdroj: | RSC Advances. 7:4144-4151 |
| ISSN: | 2046-2069 |
| Popis: | Rice husk is one of the most earth abundant, low-cost, and eco-friendly agricultural residues. In this study, we successfully synthesized micro/mesoporous activated carbon from rice husk (AC-RH) through carbonizing the rice husk and activating it with ZnCl2. Elemental sulfur was loaded to the micro/mesopores through a solution infiltration method to form an AC-RH/S composite. The obtained AC-RH/S composites with different sulfur-loading levels were tested as cathode materials for lithium sulfur (Li–S) batteries. The AC-RH/S composite with sulfur loading (AC-RH/S1) of 23 wt% showed an initial discharge capacity of 1352 mA h g−1 at 0.1 C-rate. After 100 cycles of charge/discharge at a current density of 335 mA g−1, the AC-RH/S1 composite retained a high specific capacity of 518 mA h g−1 with a capacity retention of 49%. The material delivered a capacity of 426 mA h g−1 at 2C rate. These results suggest that rice husk can be a sustainable resource for the large-scale production of activated carbon, which is a promising material for the cathodes of Li–S batteries. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|