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Author Fang, Changjiang ♦ Yang, Shuli ♦ Zhao, Xinfei ♦ Du, Pingfan ♦ Xiong, Jie
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ NANOSCIENCE AND NANOTECHNOLOGY ♦ CALORIMETRY ♦ ELECTROCHEMISTRY ♦ FLUORINATED ALIPHATIC HYDROCARBONS ♦ FOURIER TRANSFORMATION ♦ INFRARED SPECTRA ♦ IONIC CONDUCTIVITY ♦ LITHIUM ION BATTERIES ♦ MONTMORILLONITE ♦ MORPHOLOGY ♦ NANOCOMPOSITES ♦ NANOSTRUCTURES ♦ PHASE STABILITY ♦ POLYVINYLS ♦ SCANNING ELECTRON MICROSCOPY ♦ TENSILE PROPERTIES ♦ THIN FILMS ♦ X-RAY DIFFRACTION
Abstract Highlights: • Composite separators of PVDF and MMT for lithium-ion batteries were electrospun. • Thermal dimensional stability and tensile property of composite separators get improved. • Presence of montmorillonite promotes electrical properties of PVDF fibrous separators. • Batteries consisting of PVDF/MMT-5% separator achieve the best performance. - Abstract: Composite separators of poly(vinylidene fluoride) (PVDF) with different contents of montmorillonite (MMT) for Li-ion batteries have been fabricated by electrospinning. The morphology, function group, crystallinity, and mechanical properties of membranes were investigated by scanning electron microscope (SEM), Fourier Transform infrared spectra (FT-IR), differential scanning calorimetry (DSC), and tensile test, respectively. Interlayer spacing of MMT in polymer was characterized by X-ray diffraction (XRD). In addition, the results of electrochemical measurements suggest that PVDF/MMT-5% composite membrane has maximum ionic conductivity of 4.2 mS cm{sup −1}, minimum interfacial resistance of 97 Ω, and excellent electrochemical stability. The cell comprising PVDF/MMT-5% composite membrane shows higher capacity and more stable cycle performance than the one using commercial Celgard PP membrane.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-07-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 79


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