期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 26, 期 72, 页码 17567-17573出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202003807
关键词
boron nitride fibers; lithium polysulfide; lithium-sulfur batteries; multiwalled carbon nanotubes
资金
- National Natural Science Foundation of China [51802073]
- Hebei province eighth batch of 100 people plan project [E2018050008]
- Natural Science Foundation of Hebei Province [E2020202145]
Lithium-sulfur (Li-S) batteries are one of the most promising high-energy-density storage systems. However, serious capacity attenuation and poor cycling stability induced by the shuttle effect of polysulfide intermediates can impede the practical application of Li-S batteries. Herein we report a novel sulfur cathode by intertwining multi-walled carbon nanotubes (CNTs) and porous boron nitride fibers (BNFs) for the subsequent loading of sulfur. This structural design enables trapping of active sulfur and serves to localize the soluble polysulfide within the cathode region, leading to low active material loss. Compared with CNTs/S, CNTs/BNFs/S cathodes deliver a high initial capacity of 1222 mAh g(-1) at 0.1 C. Upon increasing the current density to 4 C, the cell retained a capacity of 482 mAh g(-1) after 500 cycles with a capacity decay of only 0.044 % per cycle. The design of CNTs/BNFs/S gives new insight on how to optimize cathodes for 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