Lithium-ion battery separators based on electrospun PVDF: A review

Bicy, K; Gueye, Amadou Balal; Rouxel, Didier; Kalarikkal, Nandakumar; Thomas, Sabu

doi:10.1016/j.surfin.2022.101977

Cited by 50 publications

(39 citation statements)

References 138 publications

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“…A typical LIBs consist of positive electrodes, negative electrodes, liquid electrolyte, and separator. The role of the separator in LIBs is to prevent physical contact of the electrodes while acting as an electrolyte reservoir to satisfy ion transport 1–3 . Although the separator is not directly involved in reaction, its structure and performance have an influence on the performance of the battery.…”

Section: Introductionmentioning

confidence: 99%

High‐performance nano‐TiO₂@polyvinylidene fluoride composite separators prepared by electrospinning for safe lithium‐ion battery

Gao

Cao

et al. 2023

J of Applied Polymer Sci

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Traditional polyolefin separators cannot guarantee safety for lithium-ion batteries at high temperature due to their low melting point, especially for high power discharge. Therefore, it is imperative to develop separators with excellent thermal stability. In this paper, we have prepared TiO 2 modified PVDF composite separators by electrospinning. When compared with commercial PE separators, this kind of composite separators show superior thermal stability at 160 C. In addition, it is found that the 0.5-TiO 2 @PVDF separator exhibits excellent flame retardant and optimal tension strength. Meanwhile, the 0.5-TiO 2 @PVDF separator exhibits ideal liquid electrolyte storage capacity, which improves the ionic conductivity (0.68 mS cm À1 ). As a result, the LiCoO 2 jjLi cells with 0.5-TiO 2 @PVDF separator have high discharge capacity retention rate at a current density of 1 C (300 cycles) and excellent rate performance (1.75 mAh at 5 C). In short, nano-TiO 2 modified PVDF separator has a great application prospect in high-performance and high-safety lithium-ion batteries.

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Section: Introductionmentioning

confidence: 99%

High‐performance nano‐TiO₂@polyvinylidene fluoride composite separators prepared by electrospinning for safe lithium‐ion battery

Gao

Cao

et al. 2023

J of Applied Polymer Sci

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“…Due to fossil fuel depletion and pollution, new energy research focuses on cost-effective and environmentally friendly technology. Lithium-ion batteries have a low self-discharge rate, a longer lifespan, a higher energy density, and a lower price, making them excellent for energy storage in portable electronic devices. − Safety performance is vital toward this endeavor and has become a technological barrier for industrial production on a broad scale. LIB electrolytes contribute to safety problems with batteries.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Effects of Dopamine and DMMP Additives on Improving the Cycle Boosting and Nonflammability of Electrolytes in Full-Cell Lithium-Ion Batteries (18650)

et al. 2023

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Concerns over recyclability, performance, and safety have grown as the use of commercial Li-ion batteries to meet our energy needs has increased. Electrolytes may aid in increased flammability, capacity loss, and safety. Dimethyl methyl phosphonate (DMMP), a flame retardant, and dopamine hydrochloride (DOP) are utilized to increase the cycle life and graphite anode compatibility. The optimal additive formulation (5% wt DMMP and 0.1% wt DOP) reduces inflammability and increases cycle life and reversible capacity (99.14%). Molecular dynamics simulations provide a comprehensive atomistic account of the dynamics of Li + ion solvation in the electrolytes and in the presence of additives. Dopamine and DMMP increase the Li-ion solvation-free energy in the electrolyte formulation. While increasing the Li-ion conductivity, additive addition reduces the electrolyte viscosity and enables the formation of a smaller, stronger Li-DMMP-DOP complex than the larger Li-carbonate complex found in Li-neat electrolyte systems. When DMMP and DOP are added to the electrolyte, the carbonates are displaced from the Li-carbonate complex by these additives. The Li-ion solvating nature or compatibility was improved upon the addition of DMMP/DOP further aided by a faster diffusive behavior of the Li complex, which in part would be instrumental in enhancing the performance and safety of the battery electrolyte additive formulations. The modified electrolyte (DMMP 5% wt, DOP 0.1% wt) has a conductivity of 18.60 mS cm −1 and a low viscosity at 25 °C. This formulation was evaluated using graphite/NMC-532 cylindrical cells with commercial electrodes. The performance of the graphite/NMC-532 cells containing the modified electrolyte was comparable to those of regular electrolytes based on carbonates: ethylene carbonate/ dimethyl carbonate/ethylmethylcarbonate (EC/DMC/EMC) (1:1:1) additions. These findings indicate that DOP and DMMP have a lower oxidation potential (4.3 V) than most commercial electrolytes (4.5 V), preventing cathode deterioration. These insights should pave the path for rational design of practical and cost-effective Li-ion battery electrolyte additive combinations aimed toward lower flammability and improved performance.

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“…From a structural point of view, LIBs are mainly composed of four parts: anode, cathode, separator, and electrolyte. , As the core component of LIBs, the separator can separate the positive and negative electrodes of LIBs to avoid short circuits. Meanwhile, the porous structure of the separator allows ions to pass selectively and freely so that the reactions inside the battery are reversible . At present, polyolefin microporous membranes, especially polyethylene (PE), polypropylene (PP), and sandwich PP/PE/PP, have become the most widely used separator products in LIBs because of their low price, good mechanical strength, and excellent chemical and electrochemical stability .…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, the porous structure of the separator allows ions to pass selectively and freely so that the reactions inside the battery are reversible. 6 At present, polyolefin microporous membranes, especially polyethylene (PE), polypropylene (PP), and sandwich PP/PE/PP, have become the most widely used separator products in LIBs because of their low price, good mechanical strength, and excellent chemical and electrochemical stability. 7 At present, problems regarding polyolefin separators such as weak electrolyte affinity, low porosity, poor wettability, and poor thermal stability lead to low energy density and inferior rate and cycling performances in LIBs.…”

Section: Introductionmentioning

confidence: 99%

“Polymer-in-Ceramic” Membrane for Thermally Safe Separator Applications

et al. 2022

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In this work, a facile casting method was utilized to prepare “polymer-in-ceramic” microporous membranes for thermally safe battery separator applications; that is, a series of composite membranes composed of silicon dioxide (SiO2) as a matrix and polyvinylidene fluoride (PVDF) as a binder were prepared. The effects of different SiO2 contents on various physical properties of membranes such as the porosity, electrolyte absorption rate, electrochemical stability, and especially thermal stability of the SiO2/PVDF composite membranes were systematically studied. Compared with a commercial polypropylene separator, the SiO2/PVDF membrane has a higher porosity (66.0%), electrolyte absorption (239%), and ion conductivity (1.0 mS·cm–1) and superior thermal stability (only 2.1% shrinkage at 200 °C for 2 h) and flame retardancy. When the content of SiO2 in the membrane reached 60% (i.e., PS6), LiFePO4/PS6/Li half-cells exhibited excellent cycle stability (138.2 mA h·g–1 discharging capacity after 100 cycles at 1C) and Coulombic efficiency (99.1%). The above advantages coupled with the potential for rapid and large-scale production reveal that the “polymer-in-ceramic” SiO2/PVDF membrane has prospective separator applications in secondary lithium-ion batteries.

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Lithium-ion battery separators based on electrospun PVDF: A review

Cited by 50 publications

References 138 publications

High‐performance nano‐TiO₂@polyvinylidene fluoride composite separators prepared by electrospinning for safe lithium‐ion battery

High‐performance nano‐TiO₂@polyvinylidene fluoride composite separators prepared by electrospinning for safe lithium‐ion battery

Exploring the Effects of Dopamine and DMMP Additives on Improving the Cycle Boosting and Nonflammability of Electrolytes in Full-Cell Lithium-Ion Batteries (18650)

“Polymer-in-Ceramic” Membrane for Thermally Safe Separator Applications

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Lithium-ion battery separators based on electrospun PVDF: A review

Cited by 50 publications

References 138 publications

High‐performance nano‐TiO2@polyvinylidene fluoride composite separators prepared by electrospinning for safe lithium‐ion battery

High‐performance nano‐TiO2@polyvinylidene fluoride composite separators prepared by electrospinning for safe lithium‐ion battery

Exploring the Effects of Dopamine and DMMP Additives on Improving the Cycle Boosting and Nonflammability of Electrolytes in Full-Cell Lithium-Ion Batteries (18650)

“Polymer-in-Ceramic” Membrane for Thermally Safe Separator Applications

Contact Info

Product

Resources

About

High‐performance nano‐TiO₂@polyvinylidene fluoride composite separators prepared by electrospinning for safe lithium‐ion battery

High‐performance nano‐TiO₂@polyvinylidene fluoride composite separators prepared by electrospinning for safe lithium‐ion battery