期刊
JOURNAL OF MEMBRANE SCIENCE
卷 626, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.memsci.2021.119190
关键词
Lithium-ion batteries; MOF; Polybenzimidazole; Composite separator; Dual-channel; Lithium dendrite
资金
- National Natural Science Foundation of China [51773118]
- Natural Science Foundation of Guangdong Province [2015A030313546, 2017A030310653]
- Shenzhen Sci & Tech research grant [JCYJ20170818093417096]
- Science and Technology Planning Program Foundation of General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic Chain [2016QK129]
- Nanshan District special funds [FG20113JNYF0015A]
- Postdoctoral Research Foundation of the Shenzhen Academy of Metrology & Quality Inspection [2016YA38]
The study developed an effective strategy to prepare a dual transport pathway separator combining OPBI and UiO-66 filler, which showed superior properties compared to the pristine OPBI separator, delivering higher ionic conductivity and significant LiFePO4/Li cell performance improvement, as well as effectively addressing lithium dendrite issues.
Metal-organic framework (MOF) nanoparticles with an inherently ordered porous structure are a promising component for improving the safety of rechargeable batteries. However, a separator combining the polybenzimidazole (PBI) matrix and the MOF filler has not yet been developed to optimize lithium-ion batteries (LIBs). Here, an effective strategy has been designed to prepare the dual transport pathway separator containing poly (aryl ether benzimidazole) (OPBI) and the UiO-66 (zirconium-based MOF) filler using a phase separation method. The composite membranes show excellent properties, such as superior wettability, thermostability, flame resistance and interfacial compatibility, resulting from the interconnected porous network structure formed by the synergistic regulation of PBI porous structure and nano-MOF channels. Compared with the pristine OPBI separator, the composite separator (M40) containing 40% UiO-66 delivers a higher ionic conductivity, a significant improvement in LiFePO4/Li cell performance (151.6 mAh g(-1)), and an excellent rate capacity. Furthermore, the M40 exhibits the good uniformity of lithium electrodeposition and the effective inhibition of the lithium dendrite issues. The dual-channel strategy provides broader prospects for the application of the polybenzimidazole separator aided by the MOF crystals towards advanced-safety and high-performance LIBs.
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