Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 119, Issue 50, Pages 27882-27891Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.5b09130
Keywords
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Funding
- Guangdong Science and Technology Planning Project [2015A020209147, 2014A010105038]
- Guangdong Natural Science Foundation [9151064201000039]
- National Natural Science Foundation of China [51003034, 31101854]
- Key Academic Program of the third phase 211 Project [2009B010100001]
- State Key Laboratory of Motor Vehicle Biofuel Technology [2013025]
- Opening Project of the Key Laboratory of Application Technology of Environmental Photocatalysis of Hunan Province [ccsu-KF-1402]
- Air Force Office of Scientific Research [FA9550-12-1-0159]
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A novel high-performance gel polymer electrolyte (GPE) based on an electrospun polymer membrane of poly(vinylidene fluoride)/poly(propylene carbonate) (PVdF/PPC) was prepared and investigated for high-performance lithium-ion battery applications. This study presents a methodology for introducing PPC into PVdF-based GPEs designed for high-performance lithium-ion batteries. SEM images and porosity measurements showed that the electrospun membrane had a uniform and highly interconnected porous structure with an average fiber diameter of 300-850 nm. Such a morphology resulted in excellent electrolyte uptake amount (500 wt %) and retention in PVdF/PPC membrane. The DSC result indicated that the PVdF crystallinity was deteriorated by the incorporation of PPC. The PVdF/PPC electrospun membrane showed significantly higher ionic conductivity (4.05 mS.cm(-1)) than that of the PVdF electrospun membrane (2.11 mS.cm(-1)) at 30 degrees C. The PVdF/PPC GPE was stable at a potential higher than 5.2 V (versus Li+/Li). The capacity of Li/CGE-20/LiFePO4 was 160, 151, 133, 119, and 102 mAh g(-1) at a charge/discharge rate of 0.1, 0.2, 0.5, 1, and 2 C, respectively.
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