期刊
RSC ADVANCES
卷 7, 期 7, 页码 4144-4151出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra26179e
关键词
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资金
- World Class 300 Project (R&D) of the SMBA (Korea) [S2367787]
- Leading Human Resource Training Program of Regional Neo industry through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and future Planning [NRF-2016H1D5A1910545]
- Korea Technology & Information Promotion Agency for SMEs (TIPA) [S2367787] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
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