期刊
NANO RESEARCH
卷 15, 期 10, 页码 8946-8954出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-022-4523-z
关键词
hyperbranched cross-linked polymer electrolyte; all-solid-state; metal-organic frameworks; composite; lithium metal batteries
类别
资金
- National Natural Science Foundation of China [52073285, 11975238]
In this study, a novel hyperbranched-polyether-type composite solid polymer electrolyte (CSPE) is prepared via a quick cross-linking reaction, which shows improved lithium ion conduction ability and cycling performance due to the hydrogen bonds between the fluorine atoms and amino groups in the electrolyte.
Poly(ethylene oxide) (PEO)-based solid polymer electrolytes (SPEs) are commonly used in lithium metal batteries (LMBs) for their good Li-salt solvating ability and easy processability. However, the relatively low Li-ion conduction ability hinders their further development. In this work, a novel hyperbranched-polyether-type composite solid polymer electrolyte (CSPE) is prepared via a quick cross-linking reaction between aldehyde-terminated polyethylene glycol (PEG) and hyperbranched poly(ethylene imine) (HPEI) in the presence of lithium salt and fluorine-containing Zr-based metal-organic framework (MOF) UiO-66-(F)(4). The hydrogen bonds between the fluorine atoms and amino groups in the electrolyte help to the better dispersion of UiO-66-(F)(4) in the polymer matrix, which is beneficial to solving the problem of aggregation of nanofillers. Besides, the CSPEs with the functional MOF fillers show improvements in both electrochemical and mechanical properties. Notably, the Li-ion transference number (t(Li+)) is considerably enhanced from 0.23 to 0.54. All-solid-state LMBs based on the CSPE also present good cycling performances. A high specific discharge capacity of 141.4 mAh center dot g(-1) is remained after 200 cycles at 0.2 C. This study not only provides an effective synthesis method of the cross-linked hyperbranched polymer electrolyte, but also puts forward a new strategy for uniform dispersion of inorganic fillers in CSPEs.
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