PDF Publication Title:
Text from PDF Page: 003
Membranes 2021, 11, 267 3 of 11 China). Lithium iron phosphate (LiFePO4) was obtained from Taiwan Likai Power Tech- nology Co., Ltd. (Taiwan, China). Acetylene black was purchased from Tianjin Yiborui Chemical Co., Ltd. (Tianjin, China). Polyvinylidene fluoride (PVDF) was bought from Arkema Fluor Chemical Co., Ltd. (Suzhou, China). The liquid electrolyte (1 mol·L−1 LiPF6, EC/EMC/DMC (1:1:1, volume ratio)) was supplied by Duoduo Chemical Technology Co., Ltd. (Suzhou, China). Commercial PE separator was purchased from SK Innovation for comparison (Changzhou, China). 2.2. Preparation of Electrospun PAN Separator To prepare the solution for electrospun PAN separator preparation, PAN powder was dissolved in DMF under stirring at room temperature for 12 h to obtain a 10 wt% solution. The electrospinning equipment (ELITE) was provided by Beijing Yongkang Leye Technology Development Co., Ltd. (Beijing, China). Then, under a high voltage of 11 kV, enough solution was taken in the syringe and pushed out at a rate of 0.04 mm/min. During the spinning, the distance between the needle tip and collector was kept at 15 cm. After 11 h of spinning, the pure PAN separator was pressed at 120 ◦C for 30 min and dried at 80 ◦C for 12 h to extirpate the remaining solvent. The pure PAN separator is referred to as PAN in subsequent descriptions. 2.3. Preparation of Composite Separator First, a certain amount of phenoxy resin was dissolved in the mixture of DMF/acetone (1:2, v/v) to obtain a 5 wt% phenoxy resin solution. To prepare the solution for dipping, varying amounts of ZSM-5 were dissolved in 5 wt% phenoxy resin solution under ultrasonic for 12 h. The concentrations of ZSM-5 (w/v) were 0%, 0.5%, 1%, 1.5%, and 2%, respectively. The previously prepared pure PAN separator was immersed in the ZSM-5 dispersion with different contents for 20 min and then taken out. The composite separators were first dried at room temperature until there was no obvious liquid on the surface and then dried in an oven at 60 ◦C for 12 h. For identification, composite partitions containing 0 wt%, 0.5 wt%, 1 wt%, 1.5 wt%, and 2 wt% ZSM-5 were defined as Z/PAN-0, Z/PAN-0.5, Z/PAN-1, and Z/PAN-1.5, Z/PAN-2, respectively. 2.4. Characterization of Composite Separator In the range of 400–4000 cm−1, the Fourier transform infrared spectrum (FTIR, Nexus, Therno Nicolet, Waltham, MA, USA) was applied to demonstrate the presence of phenolic oxygen and ZSM-5 on the separator. The morphologies of composite separators were inves- tigated by scanning electron microscopy (SEM, JSM-IT300, JEOL, Tokyo, Japan) after sput- tering a thin layer of gold. The tensile strengths of the separator samples (50 mm × 10 mm) were tested by using a universal testing apparatus (Instron5967, Instron Pty Ltd., Norwood, MA, USA), at a speed of 5 mm·min−1. The contact angles of the separators and electrolytes were measured with a contact angle meter (OCA20, Dataphysics, Filderstadt, Germany). The electrolyte uptake of the separators was calculated by measuring the weight change before and after being soaked in the electrolyte for 2 h, and then calculated by the equation: Electrolyte uptake (%) = (M − M0)/M0 × 100 (1) where M0 is the weight of the separators without being soaked and M is the weight of the separators after being soaked in an electrolyte. The thermal stability of the separators was analyzed by a thermogravimetric analyzer– differential scanning calorimeter (TGA–DSC, STA449F3, Netzsch, Selb, Germany) in the temperature range from 40 ◦C to 800 ◦C at a heating rate of 10 ◦C·min−1. The thermal shrinkage of separators was checked by placing membranes in a drying oven at different temperatures from 120 to 180 ◦C for 30 min. After being heated, the dimensional change was measured by the equation: Shrinkage (%) = (A0 − A)/ A0 × 100 (2)PDF Image | Electrospinning Polyacrylonitrile Separator with Dip-Coating of Zeolite
PDF Search Title:
Electrospinning Polyacrylonitrile Separator with Dip-Coating of ZeoliteOriginal File Name Searched:
membranes-11-00267.pdfDIY PDF Search: Google It | Yahoo | Bing
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)