Electrospun montmorillonite modified poly(vinylidene fluoride) nanocomposite separators for lithium-ion batteries

Journal Article · Fri Jul 15 04:00:00 EDT 2016 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2016.02.015· OSTI ID:22581567

Fang, Changjiang; Yang, Shuli; Zhao, Xinfei ^[1]; Du, Pingfan ^[1]; Xiong, Jie ^[1]

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1. College of Materials and Textile, Zhejiang Sci-Tech University, Hangzhou 310018 (China)

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.

• OSTI ID: 22581567
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 79; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 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