Improved performances of lithium-ion batteries with a separator based on inorganic fibers

被引:103
作者
Wang, Meina [1 ]
Chen, Xin [1 ]
Wang, Hong [2 ]
Wu, Haibo [2 ]
Jin, Xiangyu [1 ]
Huang, Chen [1 ]
机构
[1] Donghua Univ, Coll Text, Minist Educ, Key Lab Text Sci & Technol, Shanghai 201620, Peoples R China
[2] Donghua Univ, Coll Text, Minist Educ, Engn Res Ctr Tech Text, Shanghai 201620, Peoples R China
基金
中国国家自然科学基金;
关键词
COATED POLYPROPYLENE SEPARATORS; BLEND MICROPOROUS MEMBRANES; LI-ION; POLYETHYLENE SEPARATORS; NONWOVEN SEPARATOR; COMPOSITE NONWOVEN; THERMAL-STABILITY; PHASE INVERSION; FLUORIDE); ELECTROLYTES;
D O I
10.1039/c6ta08404d
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Battery separators made of inorganic powders and polymeric substrates have attracted intensive attention from both industry and academia. However, existing technology suffers from an inherent limitation in that the aggregation of powders during manufacturing and the escape of powders in use are inevitable. In this work, we report for the first time, a novel separator prepared by blending inorganic ZrO2 staple fibers with poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP). Through a unique phase inversion process, the separator shows a skinless surface, a highly porous internal structure and a uniform distribution of pore size. Systematical comparison of a fiber-based separator and a powder-based separator demonstrates that the reinforcement from the fiber skeleton can provide the separator with desired porosity, sufficient mechanical strength, superior thermal stability and improved electrochemical performance. We anticipate that the concept of combining inorganic fiber substrates with polymeric media will offer a platform strategy towards the fabrication of high-safety separators for lithium-ion batteries and other energy storage systems.
引用
收藏
页码:311 / 318
页数:8
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