4.8 Article

Durable Carbon-Coated Li2S Core-Shell Spheres for High Performance Lithium/Sulfur Cells

期刊

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 136, 期 12, 页码 4659-4663

出版社

AMER CHEMICAL SOC
DOI: 10.1021/ja412943h

关键词

-

资金

  1. China Scholarship Council
  2. LBNL Molecular Foundry

向作者/读者索取更多资源

Lithium sulfide (Li2S) is an attractive cathode material with a high theoretical specific capacity (1166 mAh g(-1)). However, the poor cycle life and rate capability have remained significant challenges, preventing its practical application. Here, Li2S spheres with size control have been synthesized for the first time, and a CVD method for converting them into stable carbon-coated Li2S core-shell (Li2S@C) particles has been successfully employed. These Li2S@C particles with protective and conductive carbon shells show promising specific capacities and cycling performance with a high initial discharge capacity of 972 mAh g(-1) Li2S (1394 mAh g(-1) S) at the 0.2C rate. Even with no added carbon, a very high Li2S content (88 wt % Li2S) electrode composed of 98 wt % 1 mu m Li2S@C spheres and 2 wt % binder shows rather stable cycling performance, and little morphology change after 400 cycles at the 0.5C rate.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据