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![Schematic Vacuum Filtration Method[71]](publication/350151397/figure/fig5/AS:1020878586396675@1620407830861/Schematic-Vacuum-Filtration-Method71.png)
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![Figure 4. Phase inversion method [4]](publication/350151397/figure/fig3/AS:1020878586400773@1620407830814/Phase-inversion-method-4_Q320.jpg)
![Figure 6. Schematic illustration of the stages of the dip-coating [67].](publication/350151397/figure/fig4/AS:1020878586384387@1620407830836/Schematic-illustration-of-the-stages-of-the-dip-coating-67_Q320.jpg)
![Figure 7. Schematic Vacuum Filtration Method[71]](publication/350151397/figure/fig5/AS:1020878586396675@1620407830861/Schematic-Vacuum-Filtration-Method71_Q320.jpg)
Lithium ion batteries (LIB) are an important energy storage system. As one component in a LIB, the separator has an important role in the safety of LIB. Separators have porous structures that make it possible to transfer lithium ions between anode and cathode. This paper discusses the method for making separators with the main material as PVdF and...
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The rapid‐growing demands for lithium‐ion batteries (LIBs) have raised concerns over lithium's scarcity as well as the scarcity of other materials and components used in LIBs. Tremendous efforts have been dedicated to investigating alternative technologies. Dual‐ion batteries (DIBs) represent an emerging battery technology with an attractive future...
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... The cellulose-based separators (TOCNF-HEF and CMC/HEC) exhibit both high ionic conductivity and acceptable mechanical property, particularly for the TOCNF-HEF separator prepared in this study presenting a high electrolyte uptake of 978.8% due the optimized pore structure. This attractive electrolyte wettability and absorption give a high ionic conductivity [25]. Adequate properties can be obtained by composite separators, such as the ZrO 2 -reinforced cellulose acetate membranes (ZrO 2 @MCA), agarose-based membranes with poly (vinyl alcohol) (Agarose/PVA) and cellulose-polyacrylonitrile-alumina composite (Cellulose-PAN-Al 2 O 3 ). ...
Cellulose nanofibrils (CNF) with high thermal stability and excellent electrolyte wettability attracted tremendous attention as a promising separator for the emerging sodium-ion batteries. The pore structure of the separator plays a vital role in electrochemical performance. CNF separators are assembled using the bottom-up approach in this study, and the pore structure is carefully controlled through film-forming techniques. The acid-treated separators prepared from the solvent exchange and freeze-drying demonstrated an optimal pore structure with a high electrolyte uptake rate (978.8%) and Na+ transference number (0.88). Consequently, the obtained separator showed a reversible specific capacity of 320 mAh/g and enhanced cycling performance at high rates compared to the commercial glass fiber separator (290 mAh/g). The results highlight that CNF separators with an optimized pore structure are advisable for sodium-ion batteries.
Freestanding, composite films of poly(vinylidene fluoride) (PVDF) and cellulose were synthesized and characterized for morphological, microstructural, vibrational and dielectric properties. The thickness of the freestanding films was found to be ~38 μm. Contact angle measurements showed the hydrophobic nature of the composite films. Fourier transformed infrared (FTIR) spectroscopy confirmed the reduction in the α$$ \alpha $$ phase content of the PVDF films with the addition of fillers. The measured dielectric constant of the composite films was found to be more than two times than that of the pristine films. An increase in the dielectric constant of the composite films was attributed to the Maxwell–Wagner–Sillars (MWS) polarization. A triboelectric nanogenerator (TENG) operating in a vertical contact‐separation configuration was fabricated using these composite films. A maximum output power density of ~6 μW/cm2 was achieved from the TENG fabricated using the composite films.
