期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 49, 页码 42233-42240出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b14213
关键词
fluoro-substituted; covalent organic frameworks; Li-sulfur battery; porous polymers; sulfur confinement
资金
- National Natural Science Foundation of China [21204047, 21706292, 21674129]
- China Scholarship Council
- Hunan Provincial Science and Technology Plan Project [2017TP1001]
- National Key Research and Development Program of China [2018YFB010403]
- Innovation Mover Program of Central South University [2018CX046]
- National Science Foundation [CBET-1605528]
We report the preparation of a highly fluoro-substituted crystalline covalent organic framework (COF) and its application as a cathode material in lithium-sulfur batteries (LSBs) upon sulfur confinement. A sulfur-functionalized COF with high sulfur content (60 wt %) was obtained through physisorption of elemental sulfur and subsequent SNAr reaction of sulfur with aromatic fluorides on the COF backbone. After such physical and chemical confinement of sulfur through a postfunctionalization approach, the COF material still shows some structural order, allowing us to investigate the structure-property relationship of such COF materials in LSB application. We compared the electro-chemical performances of the two cathode materials prepared from a crystalline COF and its amorphous counterpart and studied the important factors that affect battery capacity, reaction kinetics, and cycling stability.
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