期刊
CHEMELECTROCHEM
卷 9, 期 15, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.202200474
关键词
catalyzation; flower-like structure; lithium-sulfur battery; synergistic effect; WS2 nanosheets
资金
- Ministry of Science and Technology of China [2016YFA0200200]
- National Natural Science Fund of China [51673060, 11574075]
- China Scholarship Council
Lithium-sulfur batteries are promising alternatives for energy storage due to their high theoretical capacity and low cost. This study focuses on modifying separators with functional nanoflower composites to improve the cycling stability and rate performance of the batteries.
Featuring high theoretical capacity, environmental friendliness and low cost, lithium-sulfur (Li-S) batteries become promising alternatives to satisfy the growing demand for energy storage. To boost their energy density for practical application, modified separators are needed to suppress shuttle effects resulting from the solubility of lithium polysulfides (LiPSs). Herein, we modified traditional polypropylene (PP) separators with functional WS2@C nanoflower composites (WS2@C-PP). They can effectively adsorb LiPSs and catalyze their conversion on the edge sites of the WS2. Also, the unique construction of a carbon layer coating on the WS2 nanoflowers combines active sites and conducting properties. The material benefits the reversibility of redox reactions and reutilization of active materials. With the WS2@C-PP separator, the cell displays improved cycling stability and rate performance. When cycling at 0.1 C, the cell discharges a capacity of up to 1475 mAh g(-1), and it contributes 943 mAh g(-1) originally at 1 C, with a decay rate of only 0.07 % after 500 cycles. Our work highlights the potential of functional separators to advance the properties of Li-S batteries.
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。
推荐
暂无数据