Nanocomposite PVDF Membrane for Battery Separator Prepared via Hot Pressing

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F23%3A10252880" target="_blank" >RIV/61989100:27640/23:10252880 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/2313-0105/9/8/398" target="_blank" >https://www.mdpi.com/2313-0105/9/8/398</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/batteries9080398" target="_blank" >10.3390/batteries9080398</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nanocomposite PVDF Membrane for Battery Separator Prepared via Hot Pressing

Popis výsledku v původním jazyce

Polyvinylidene fluoride (PVDF) is one of the materials most commonly used in membrane separators. The structures of pristine PVDF and PVDF nanocomposite films were processed via hot pressing at 140oC, 170oC, and 185oC at a pressure of 2 tons for 15 min. According to a surface investigation using scanning electron microscopy (SEM), the spherulitic character of the PVDF nanocomposite films was preserved up to a pressing temperatures of 140oC. The cross-sectional SEM images confirmed that higher pressing temperatures (170oC) caused the structures to be compacted into monolithic films, and a pressing temperature of 185 oC caused the melting of the PVDF matrix and its recrystallization into thin films (21-29 μm). An average crystallinity value of 51.5% was calculated using differential scanning calorimetry (DSC), and this decreased as the pressing temperature increased. Fourier transform infrared (FTIR) measurements confirmed the presence of a dominant γ phases in the PVDF nanocomposite films, whose nanofillers consisted of vermiculite particles (ZnO_V and ZnO_V_CH) and mixed α + γ phases. The percentage of the electroactive γ phase (approximately 79%) was calculated via a FTIR analysis, and the ratio between the β phase and the α phase was determined from the Raman spectra. A hydrophilic surface with contact angles ranging from 61o to 84o was demonstrated for all the PVDF nanocomposite membranes. The superoleophilic surface was measured using poly(dimethylsiloxane) with contact angles ranging from 4o to 13o, and these angles reached lower values when in contact with sulfur particles.

Název v anglickém jazyce

Nanocomposite PVDF Membrane for Battery Separator Prepared via Hot Pressing

Popis výsledku anglicky

Polyvinylidene fluoride (PVDF) is one of the materials most commonly used in membrane separators. The structures of pristine PVDF and PVDF nanocomposite films were processed via hot pressing at 140oC, 170oC, and 185oC at a pressure of 2 tons for 15 min. According to a surface investigation using scanning electron microscopy (SEM), the spherulitic character of the PVDF nanocomposite films was preserved up to a pressing temperatures of 140oC. The cross-sectional SEM images confirmed that higher pressing temperatures (170oC) caused the structures to be compacted into monolithic films, and a pressing temperature of 185 oC caused the melting of the PVDF matrix and its recrystallization into thin films (21-29 μm). An average crystallinity value of 51.5% was calculated using differential scanning calorimetry (DSC), and this decreased as the pressing temperature increased. Fourier transform infrared (FTIR) measurements confirmed the presence of a dominant γ phases in the PVDF nanocomposite films, whose nanofillers consisted of vermiculite particles (ZnO_V and ZnO_V_CH) and mixed α + γ phases. The percentage of the electroactive γ phase (approximately 79%) was calculated via a FTIR analysis, and the ratio between the β phase and the α phase was determined from the Raman spectra. A hydrophilic surface with contact angles ranging from 61o to 84o was demonstrated for all the PVDF nanocomposite membranes. The superoleophilic surface was measured using poly(dimethylsiloxane) with contact angles ranging from 4o to 13o, and these angles reached lower values when in contact with sulfur particles.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Batteries

ISSN

2313-0105

e-ISSN

2313-0105

Svazek periodika

9

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

16

Strana od-do

—

Kód UT WoS článku

001057725100001

EID výsledku v databázi Scopus

2-s2.0-85169033861