Improvement of <scp>PAN</scp> separator properties using <scp>PVA</scp>/malonic acid by electrospinning in lithium ion‐batteries

Khodaverdi, Fartash; Vaziri, Ali; Javanbakht, Mehran; Jahanfar, Mehdi

doi:10.1002/app.50088

Cited by 18 publications

(7 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, it is common to fabricate multifunctional PVA-based separators by combining various functional groups and nanoparticles [ 61 , 62 , 63 ]. Cross-linking is also common for PVA-based separators [ 64 , 65 , 66 ] to improve mechanical strength and control pore sizes. For example, Zhou et al [ 67 ] recently fabricated a cross-linked PVA/poly (lithium acrylic acid) (PVA/PAA-Li) NF separator via electrospinning followed by heat treatment.…”

Section: Novel Nanofiber Separatorsmentioning

confidence: 99%

Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

2023

View full text Add to dashboard Cite

Lithium-Sulfur batteries (LSBs) are one of the most promising next-generation batteries to replace Li-ion batteries that power everything from small portable devices to large electric vehicles. LSBs boast a nearly five times higher theoretical capacity than Li-ion batteries due to sulfur’s high theoretical capacity, and LSBs use abundant sulfur instead of rare metals as their cathodes. In order to make LSBs commercially viable, an LSB’s separator must permit fast Li-ion diffusion while suppressing the migration of soluble lithium polysulfides (LiPSs). Polyolefin separators (commonly used in Li-ion batteries) fail to block LiPSs, have low thermal stability, poor mechanical strength, and weak electrolyte affinity. Novel nanofiber (NF) separators address the aforementioned shortcomings of polyolefin separators with intrinsically superior properties. Moreover, NF separators can easily be produced in large volumes, fine-tuned via facile electrospinning techniques, and modified with various additives. This review discusses the design principles and performance of LSBs with exemplary NF separators. The benefits of using various polymers and the effects of different polymer modifications are analyzed. We also discuss the conversion of polymer NFs into carbon NFs (CNFs) and their effects on rate capability and thermal stability. Finally, common and promising modifiers for NF separators, including carbon, metal oxide, and metal-organic framework (MOF), are examined. We highlight the underlying properties of the composite NF separators that enhance the capacity, cyclability, and resilience of LSBs.

show abstract

Section: Novel Nanofiber Separatorsmentioning

confidence: 99%

Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

2023

View full text Add to dashboard Cite

show abstract

“…The electrolyte uptake of PVDF/PVA composite separator is larger than that of PVDF separator, which is because the of PVA to electrolyte solvent molecules is enhanced, and the electrolyte wettability is enhanced. [37] As the PVA concentration increases, the fibers produced by electrospinning become thicker, the porosity decreases, and the electrolyte uptake decreases slightly.…”

Section: Porosity and Electrolyte Uptake Analysismentioning

confidence: 99%

Preparation of High Performance Lithium‐Ion Battery Separators by Double‐Needle Electrospinning

et al. 2022

View full text Add to dashboard Cite

Traditional polyolefin separators suffer from poor heat resistance and wettability with electrolyte, which leads to compromised safety and electrical properties of lithium‐ion batteries. Polyvinylidene fluoride (PVDF) has high thermal stability and good chemical stability, but its high crystallinity leads to low ionic conductivity. In order to solve these problems, polyvinyl alcohol (PVA) resin was introduced in this paper, and the PVDF/PVA composite separator was prepared by double‐needle electrospinning. The introduction of PVA resin improved its mechanical properties and electrolyte wettability, and ionic conductivity after assembly into a battery. Double‐needle electrospinning process is simple and can preserve the surface properties of fibers, and the prepared composite separator had a high porosity and electrolyte uptake. The composite separator has an ionic conductivity of 2.454 mS ⋅ cm−1, a high capacity retention rate of 97.5 % after 100 charge and discharge cycles, and a capacity retention rate of 86.8 % under 2 C high‐rate discharge. The results show that the battery assembled with PVDF/PVA composite separator has high safety performance and electrical performance, and has application prospects.

show abstract

“…As a traditional polyolefin separator material, polyvinyl alcohol (PVA) has the disadvantages of poor insulation and low affinity to the electrolyte [13,14]. Cellulose acetate (CA), as a derivative of cellulose, has a wide range of sources [15], low prices [16], optimal mechanical properties [17] and chemical stability [18], and optimal film-forming properties [19,20].…”

Section: Introductionmentioning

confidence: 99%

Preparation of cellulose acetate based flexible separator and its application in zinc–air batteries

Yuan,

Chen,

Peng

et al. 2024

Nanotechnology

View full text Add to dashboard Cite

Flexible solid-state zinc-air batteries as a wearable energy storage device with great potential, and their separators, which control ion permeability, inhibit zinc dendrite generation, and regulate catalytic active sites, have been developed as gel electrolyte separators with high retention of electrolyte uptake. However, the gel electrolyte separator still has problems such as poor affinity with the electrolyte and poor ionic conductivity, which limits its further application. In order to further improve the electrolyte absorption, ionic conductivity and mechanical strength of cellulose acetate (CA)/polyvinyl alcohol (PVA) nanofibers, TiO2 was added to CA/PVA to increase the porosity, and glutaraldehyde (GA) was used to modify the CA/PVA/TiO2 separator by acetal reaction with CA and PVA to make the molecules closely linked. The results shows that the optimal mass fractions of TiO2 and GA were 2% and 5%, respectively. At this time, the porosity and absorption rate of the separator increased from 48% to 68.2% and 142.4% to 285.3%, respectively. The discharge capacity reached 169 mA/cm3, and the cycle stability rate was 87% after 7 stable constant current charge/discharge cycles.

show abstract

Improvement of PAN separator properties using PVA/malonic acid by electrospinning in lithium ion‐batteries

Cited by 18 publications

References 62 publications

Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

Preparation of High Performance Lithium‐Ion Battery Separators by Double‐Needle Electrospinning

Preparation of cellulose acetate based flexible separator and its application in zinc–air batteries

Contact Info

Product

Resources

About