Fabrication of poly (vinylidene fluoride) separator with better thermostability and electrochemical performance for lithium ion battery by blending polyester

Cui, Zhenyu; Shi, Haobo; Ding, Jinyue; Zhang, Jing; Wang, Hong; Wang, Hao

doi:10.1016/j.matlet.2018.06.082

Cited by 14 publications

(8 citation statements)

References 8 publications

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“…Electrospinning is a simple and straightforward way to prepare a nanofiber membrane with high porosity [5]. Many polymers, such as PAN (Polyacrylonitrile) [6,7,8,9], PVDF (Polyvinylidene fluoride) [7,10,11], PVDF-HFP (Polyvinylidene fluoride-hexafluoropropylene) [12,13,14], and PI (Polyimide) [2,9], are used to prepare LIB membranes by electrospinning. Inorganic nanoparticles, such as TiO 2 [15,16,17], SiO 2 [18], Al 2 O 3 [19], and ZrO 2 [20], have been used to prepare composite lithium-ion battery separators, which can enhance the mechanical and electrochemical properties of the separator.…”

Section: Introductionmentioning

confidence: 99%

Multilayer Nanofiber Composite Separator for Lithium-Ion Batteries with High Safety

Yang

Liu

et al. 2019

Polymers

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An original Von Koch curve-shaped tipped electrospinneret was used to prepare a polyimide (PI)-based nanofiber membrane. A multilayer Al2O3@polyimide/polyethylene/Al2O3@polyimide (APEAP) composite membrane was tactfully designed with an Al2O3@ polyimide (AP) membrane as outer shell, imparting high temperature to the thermal run-away separator performance and a core polyethylene (PE) layer imparts the separator with a thermal shut-down property at low temperature (123 °C). An AP electrospun nanofiber was obtained by doping Al2O3 nanoparticles in PI solution. The core polyethylene layer was prepared using polyethylene powder and polyterafluoroethylene (PTFE) miniemulsion through a coating process. The addition of PTFE not only bonds PE power, but also increases the adhesion force between the PE and AP membranes. As a result, the multilayer composite separator has high safety, outstanding electrochemical properties, and better cycling performance as a lithium-ion battery separator.

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Section: Introductionmentioning

confidence: 99%

Multilayer Nanofiber Composite Separator for Lithium-Ion Batteries with High Safety

Yang

Liu

et al. 2019

Polymers

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“…Thus, the use of the thermoplastic polymers cannot solve this problem effectively. To tackle this issue, inorganic components such as Al 2 O 3 , , MgO, SiO 2 , , and TiO 2 have been introduced into the polymer matrix to further improve the thermal dimension stability of the separators. − However, the polymer part of the separator is mainly thermoplastic, which bears poor thermal dimension stability, leading to limited enhancement of the thermal stability. , Besides, the inorganic particles are mainly used as a minor component in the composite separator, making limited contribution to improve the thermal stability of the separator. , It is well-known that inorganic materials possess a superior thermal stability to organic materials. However, to our best knowledge, few studies have been reported to utilize inorganic materials as a major component for composite separator fabrication because it is difficult to manufacture a robust freestanding inorganic film with the thickness in the micrometer range.…”

Section: Introductionmentioning

confidence: 99%

Thermosetting High-Rate and High-Safety Polymer/Inorganic Composite Separator for Lithium-Ion Battery through a Fast Scalable Photo Cross-Linking Process

Chafi

et al. 2021

Energy Fuels

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A separator is a crucial component in lithium-ion batteries that influences the electrochemical and safety of the battery significantly. The commercial polyolefin-based separator lacks thermal stability due to its thermoplastic structure and causes serious problems upon short-cuts. In this study, a new concept is proposed to fabricate a thermosetting polymer-based separator with superior electrochemical and thermal stability properties. Polyethylene glycol dimethacrylate (PEGDMA) monomers with different poly(ethylene glycol) (PEG) segment lengths are composited with Al2O3 nanoparticles to form separators onto a fiberglass substrate through a fast scalable photo cross-linking process. Compared to the conventional Celgard separator, the PEGDMA/Al2O3/fiberglass composite separators exhibit significantly improved electrochemical performance. Higher reversible capacities, increased capacity retention over long cycles, and enhanced rate capabilities are exhibited in the lithium iron phosphate (LFP)/Li half-cells. Excellent thermal stability is also showed by the composite separator, where a limited shape change is observed after burning due to its thermosetting structure feature and thermally stable fiberglass substrate. The mechanism responsible for the improved performance is investigated on the basis of systematic characterizations such as scanning electron microscopy (SEM), contact angle measurement, and electrochemical impedance spectroscopy (EIS). The results confirm that porous structures can be constructed within the composite separator with an enhanced electrolyte uptake and affinity toward electrolyte solution, leading to improved electrochemical kinetics and overall performance.

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“…For replacement of these commercial separators, the single polymer membranes have been prepared. The most commonly used polymers for making the membrane are PVDF-based and its copolymer [6,7,8,9,10,11,12], PVA [13], PVB [14], Polyimide [15], PEO [16], cellulose and its copolymer [17,18], PAN [19,20,21], PDMS [22], PEEK [23] and other polymers because of its high hydrophilicity, high dielectric constant, ease of film forming ability, mechanical strength and high melting temperature. The production method of polymeric membranes is divided into different categories which include the phase inversion method with pores forming such as glycerol [24], PVP [25] and DBP [26], the electrospinning and solvent evaporation method.…”

Section: Introductionmentioning

confidence: 99%

A Review on Inorganic Nanoparticles Modified Composite Membranes for Lithium-Ion Batteries: Recent Progress and Prospects

et al. 2019

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Separators with high porosity, mechanical robustness, high ion conductivity, thin structure, excellent thermal stability, high electrolyte uptake and high retention capacity is today’s burning research topic. These characteristics are not easily achieved by using single polymer separators. Inorganic nanoparticle use is one of the efforts to achieve these attributes and it has taken its place in recent research. The inorganic nanoparticles not only improve the physical characteristics of the separator but also keep it from dendrite problems, which enhance its shelf life. In this article, use of inorganic particles for lithium-ion battery membrane modification is discussed in detail and composite membranes with three main types including inorganic particle-coated composite membranes, inorganic particle-filled composite membranes and inorganic particle-filled non-woven mates are described. The possible advantages of inorganic particles application on membrane morphology, different techniques and modification methods for improving particle performance in the composite membrane, future prospects and better applications of ceramic nanoparticles and improvements in these composite membranes are also highlighted. In short, the contents of this review provide a fruitful source for further study and the development of new lithium-ion battery membranes with improved mechanical stability, chemical inertness and better electrochemical properties.

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Fabrication of poly (vinylidene fluoride) separator with better thermostability and electrochemical performance for lithium ion battery by blending polyester

Cited by 14 publications

References 8 publications

Multilayer Nanofiber Composite Separator for Lithium-Ion Batteries with High Safety

Multilayer Nanofiber Composite Separator for Lithium-Ion Batteries with High Safety

Thermosetting High-Rate and High-Safety Polymer/Inorganic Composite Separator for Lithium-Ion Battery through a Fast Scalable Photo Cross-Linking Process

A Review on Inorganic Nanoparticles Modified Composite Membranes for Lithium-Ion Batteries: Recent Progress and Prospects

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