期刊
MATERIALS LETTERS
卷 246, 期 -, 页码 144-148出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2019.03.057
关键词
Composite separator; Covalent organic frameworks; Electrochemical properties; Lithium-selenium batteries
资金
- National Natural Science Foundation of Guangdong Province [2016A030310435]
- National Natural Science Foundation of P. R. China [21471061, 21671071]
- special funds for scientific and technological innovation cultivation of undergraduate in Guangdong (special funds for climbing plan) key project [pdjha0128]
- Applied Science and Technology Planning Project of Guangdong Province, Guangzhou, China [2015B010135009, 2017B090917002]
- Guangdong Ordinary University [2015KCXTD005, 2016KZDXM023]
The shuttle effect from the dissoluble polyselenide intermediates in lithium-selenium (Li-Se) battery is a critical problem. In order to explore the effective solution, a specific composite ceramic separator including a covalent organic framework prepared by the polymerization of 2,5-Dimethoxy-1,4-Dicarboxaldeh yde and Tetrakis(4-aminophenyl) ethane (DMTA-COF) was used to enhance electrochemical performance of Li-Se battery for the first time. It should be noted that the cathode with pure selenium of 80% by weight leads to a high selenium loading of similar to 3 mg/cm(2) for the simply-made cells. Due to the small pore channel of the DMTA-COF-coated separator, the dissolution of the polyselenide LiSen (n > 4) can be effectively restrained. As a consequence, the cells delivered a long cycling performance of up to 700 cycles with high capacity of 126 mA h/g at 6 C and good capacity of 51 mA h/g at 20 C. Obviously, our study elucidates the COF-integrated separator is a promising pathway to improve the capacity and stability of the lithiumselenium battery. (C) 2019 Elsevier B.V. All rights reserved.
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