摘要
The modification method and property of Li-ion batteries Celgard2400 separator were investigated in this work. The surface of Celgard2400 separators was modified by electrospun poly(vinylidene fluoride-hexafluoropropylene)(PVDF- HFP) nanofibers as functional layer deposited on the surface of Celgard2400 membrane. The average diameter of PVDF-HFP nanofibers was dependent on the electrospinning parameters. And, the physical properties of composite separators were dependent on the thickness and porosity of PVDF-HFP nanofiber membrane. The electrolyte uptake and porosity of modified Celgard separator were increased at 2.52 and 1.92 times than before, respectively. The charge and discharge cycle characteristics and AC impedance performance of the coin type cell with PVDF-HFP / Celard composite separators were further tested; the results showed that the power capacity of celgard 2400 seperator was enhanced after modified by PVDF- HFP nanofiber membrane.
The modification method and property of Li-ion batteries Celgard2400 separator were investigated in this work. The surface of Celgard2400 separators was modified by electrospun poly(vinylidene fluoride-hexafluoropropylene)(PVDF- HFP) nanofibers as functional layer deposited on the surface of Celgard2400 membrane. The average diameter of PVDF-HFP nanofibers was dependent on the electrospinning parameters. And, the physical properties of composite separators were dependent on the thickness and porosity of PVDF-HFP nanofiber membrane. The electrolyte uptake and porosity of modified Celgard separator were increased at 2.52 and 1.92 times than before, respectively. The charge and discharge cycle characteristics and AC impedance performance of the coin type cell with PVDF-HFP / Celard composite separators were further tested; the results showed that the power capacity of celgard 2400 seperator was enhanced after modified by PVDF- HFP nanofiber membrane.
引文