...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Energy Technology: Generation,Conversion,Storage,Distribution >A Facile Preparation of S-8/C Composite Cathode for Lithium-Sulfur Cells: Influence of Intrinsic and Extrinsic Cathode Properties on the Electrochemical Performance
【24h】

A Facile Preparation of S-8/C Composite Cathode for Lithium-Sulfur Cells: Influence of Intrinsic and Extrinsic Cathode Properties on the Electrochemical Performance

机译：用于锂 - 硫细胞S-8 / C复合阴极的容易制剂：内在和外在阴极性能对电化学性能的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Lithium-sulfur batteries are still characterized by the low intrinsic electronic conductivity of sulfur in both its charged state (S-8) as well as discharged state (Li2S). Here, using ball milling, a well-dispersed active material within the carbon network is achieved using carbon black Super C65 and synthetic graphite KS6 as conductive agents. Calendering these electrodes increases the electronic percolation path resulting in enhanced electrochemical performances and reaction kinetics. Using high-speed and high-impact preparation methods improves the quality and performances of the S-8/C composite electrodes when compared with electrodes prepared using a simple mixing method (magnetic stirring). The scanning electron microscopy images indicate that KS6 is able to incase S-8 particles, resulting in a homogeneous distribution of the active material that in turn enhances the accessibility of the active material by the electrolyte and electrons. Compared with the S-8/Super C65 composite electrode, a discharge capacity of 703 mAh g(-1) is delivered by the S-8/KS6 composite electrode during the first cycle. After 30 cycles, the S-8/KS6 composite electrode delivers 477 mAh g(-1) compared to only 411 mAh g(-1) for the S-8/Super C65 composite electrode due to a continuous capacity fading.
机译：锂 - 硫电池的特征仍然是其带电状态（S-8）的硫的低固有电子电导率以及排出状态（Li2s）。这里，使用球磨，使用炭黑超C65和合成石墨KS6作为导电剂实现碳网络内的分散良好的活性材料。压延方这些电极增加了导致增强的电化学性能和反应动力学产生的电子渗流路径。使用高速和高冲击制备方法改善了与使用简单混合方法（磁搅拌）制备的电极相比的S-8 / C复合电极的质量和性能。扫描电子显微镜图像表明KS6能够侵入S-8颗粒，导致活性材料的均匀分布，其又通过电解质和电子提高了活性材料的可访问性。与S-8 /超C65复合电极相比，在第一循环期间S-8 / KS6复合电极通过S-8 / KS6复合电极输送703mAhg（-1）的放电容量。在30次循环之后，S-8 / KS6复合电极通过连续的容量衰落而向S-8 /超C65复合电极的仅411mAhg（-1）相比提供477mAhg（-1）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号