Electrochemical performance of sulfur composite cathode materials for rechargeable lithium batteries |
| |
Authors: | Feng Wu Sheng Xian Wua Ren Jie Chen Shi Chen a School of Chemical Engineering Environment Beijing Institute of Technology Beijing Key Laboratory of Environmental Science Engineering Beijing China b National Development Center for High Technology Green Material China |
| |
Institution: | a School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing Key Laboratory of Environmental Science and Engineering, Beijing 100081, China;b National Development Center for High Technology Green Material, Beijing 100081, China |
| |
Abstract: | The structure and characteristic of carbon materials have a direct influence on the electrochemical performance of sulfur–carbon composite electrode materials for lithium–sulfur battery. In this paper, sulfur composite has been synthesized by heating a mixture of elemental sulfur and activated carbon, which is characterized as high specific surface area and microporous structure. The composite, contained 70% sulfur, as cathode in a lithium cell based on organic liquid electrolyte was tested at room temperature. It showed two reduction peaks at 2.05 V and 2.35 V, one oxidation peak at 2.4 V during cyclic voltammogram test. The initial discharge specific capacity was 1180.8 mAh g−1 and the utilization of electrochemically active sulfur was about 70.6% assuming a complete reaction to the product of Li2S. The specific capacity still kept as high as 720.4 mAh g−1 after 60 cycles retaining 61% of the initial discharge capacity. |
| |
Keywords: | Sulfur composite Cathode materials Activated carbon Electrochemical performance |
本文献已被 CNKI 维普 万方数据 ScienceDirect 等数据库收录! |
| 点击此处可从《中国化学快报》浏览原始摘要信息 |
| 点击此处可从《中国化学快报》下载免费的PDF全文 |