Journal
FIBERS AND POLYMERS
Volume 18, Issue 2, Pages 212-220Publisher
KOREAN FIBER SOC
DOI: 10.1007/s12221-017-6772-0
Keywords
Lithium-ion battery; Electrospinning; PMIA nanofiber membrane; SiO2; Electrochemical performance
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Funding
- National Natural Science Foundation of China [51673148, 51678411]
- National Key Technology Support Program [2015BAE01B03]
- Innovation Fund for Technology of China [14C26211200298]
- Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China [IRT13084]
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The nanofiber membrane prepared by electrospinning has been widely applied in lithium-ion batteries. A powerful strategy for designing, fabricating and evaluating Poly-m-phenylene isophthalamide (PMIA) nanofiber membrane with SiO2 nanoparticles was developed by electrospinning in this paper. The morphology, crystallinity, thermal shrinkage, porosity and electrolyte uptake, and electrochemical performance of the SiO2/PMIA nanofiber membranes were investigated. It was demonstrated that the nanofiber membrane with 6 wt% SiO2 possessed notable properties, such as better thermal stability, higher porosity and electrolyte uptake, resulting in higher ionic conductivity (3.23 x 10(-3) S.cm(-1)) when compared with pure PMIA nanofiber membrane. Significantly, the SiO2/PMIA nanofiber membrane based Li/LiCoO2 cell exhibited more excellent cycling stability with capacity retention of 95 % after 50 cycles. The results indicated that the SiO2-doped PMIA nanofiber membranes had a potential application as separator in high temperature resistance lithium-ion batteries.
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