分离器(采油)
多硫化物
电化学
化学工程
储能
锂硫电池
硫黄
材料科学
吸附
纳米结构
纳米技术
化学
电极
有机化学
冶金
物理化学
热力学
物理
工程类
功率(物理)
电解质
量子力学
作者
Qi Wang,Hanqing Zhao,Boya Li,Chenhui Yang,Mingyang Li,Yanan Li,Peng Han,Miaomiao Wu,Tengyu Li,Ruiping Liu
标识
DOI:10.1016/j.cclet.2020.09.022
摘要
Lithium sulfur batteries with high energy density are thought to be the most potential energy storage technology that can be commercialized. However, the shuttle effect of polysulfides deteriorates its electrochemical performance. Herein, a novel Co9S8 nanostructure derived from metal organic framework material (MOF) was explored by simple liquid phase reaction and heat vulcanization of 2-methylimidazole and Co(NO3)2·6H2O on the surface of the original PP separator. The Co9S8 nano-flower cluster array wall was vertically and closely arranged with the thickness of 200 nm, and the polysulfide can be adsorbed by its physical and chemical action to slow down the “shuttle effect”. It is found that the cell with the modified separator can achieve an ideal discharge capacity of about 600 mAh/g at 1 C. The specific capacity is maintained at 500 mAh/g after 200 cycles, with only 0.11 % of capacity decay per cycle. It provides a new way for the utilization of MOF material derivatives to modify the separator in order to improve the electrochemical performance of lithium-sulfur batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI