Superior lithium battery separator with extraordinary electrochemical performance and thermal stability based on hybrid UHMWPE/SiO2 nanocomposites via the scalable biaxial stretching process

Babiker, Dafaalla M.D.; Chen, Wan; Mansoor, Basheer; Usha, Zubaida Rukhsana; Yu, Rui; Habumugisha, Jean Claude; Chen, Wei; Chen, Xin; Li, Liangbin

doi:10.1016/j.compositesb.2021.108658

Cited by 34 publications

(18 citation statements)

References 45 publications

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“…Thermal stability of separator plays an important role in battery safety especially for high‐power LIB, therefore separator should not shrink when operation temperature is elevated [31] . Thermal shrinkage tests were carried out and shown in Figure 5(a).…”

Section: Resultsmentioning

confidence: 99%

“…[30] Thermal stability of separator plays an important role in battery safety especially for high-power LIB, therefore separator should not shrink when operation temperature is elevated. [31] Thermal shrinkage tests were carried out and shown in Figure 5(a). When exposed to a temperature of 200 °C for 30 min, Celgard 2400 separator was deformed seriously due to its endured uniaxial stretching during preparation and changed…”

Section: Chemelectrochemmentioning

confidence: 99%

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Porous Sodium Alginate/Boehmite Coating Layer Constructed on PP Nonwoven Substrate as a Battery Separator through Polydopamine‐Induced Water‐Based Coating Method

Wang

Zhu

et al. 2022

ChemElectroChem

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Ceramic‐coating separator produced by aqueous slurry has drawn considerable attention because of its environmental friendliness in the development of high‐power lithium ion battery (LIB). However, there are some drawbacks existed including the formation of compact coating layer and uneven distribution of slurry. In this study, porous sodium alginate/boehmite coating layer was designed to cover on low‐cost PP nonwoven to give a battery separator (abbreviated as PCS) through polydopamine‐ induced water‐based coating method, in which nonsolvent N‐methyl pyrrolidone (NMP) was added to render porous structures through its final evaporation and the pretreatment of polydopamine on substrate could help slurry dispersed uniformly. Thoroughly investigations demonstrate this designed separator can not only endow battery with superior cell performance but also display good thermal dimensional stability and self‐extinguishing behavior. Therefore, PCS composite separator is low‐cost, environmentally friendly and feasible to meet performance requirements of high‐power LIB.

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Section: Resultsmentioning

confidence: 99%

Section: Chemelectrochemmentioning

confidence: 99%

Porous Sodium Alginate/Boehmite Coating Layer Constructed on PP Nonwoven Substrate as a Battery Separator through Polydopamine‐Induced Water‐Based Coating Method

Wang

Zhu

et al. 2022

ChemElectroChem

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“…To cope with heat generated during the operation of high power LIB, separator must have su cient thermal stability and ame retardancy, so that providing superior safety when battery working in a variety of possible normal cases, or not causing more serious explosions when sudden short-circuit reaction occurred (Babiker et al, 2021). Fig.…”

Section: Thermal Analysis Ame Retarding Property and Mechanical Behaviormentioning

confidence: 99%

Tissue paper-based composite separator using nano-SiO2 hybrid crosslinked polymer electrolyte as coating layer for lithium ion battery with superior security and cycle stability

Zeng

Liu

et al. 2022

Cellulose

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With the development of energy-storage devices, separator is encountered by several challenges including adequate safety, higher current density and superior stability. Tissue paper, composed of packed cellulose bers, possesses lower production cost, more easily accessibility, superior wettability and outstanding thermostability, thus being prospective as a substrate of high performance separator. To address structure collapse phenomenon occurred in conventional coating layer after long term electrolyte swelling, nano-SiO 2 hybrid crosslinked network was constructed on tissue paper through chemical reactions between polymer poly (vinylidene uoride-co-hexa uoropropylene) (PVDF-HFP) and hyperbranched polyethyleneimine (PEI) in this work. The in uences of crosslinking degree on physical properties and electrochemical performance were studied thoroughly. It can be found that when the crosslinking ratio of PVDF-HFP and PEI xed at 10:1, the crosslinked composite separator displays excellent electrolyte uptake and wettability, superior ionic conductivity, better interfacial compatibility as well as higher Li + transference number (0.56), thus offering battery with prominent rate capabilities.Besides, this crosslinked composite separator exhibits satisfying dimensional stability even treated at 250 o C, better ame retardancy, enhanced mechanical behavior, wider electrochemical window and outstanding cycle stability. Accordingly, tissue paper-based crosslinked composite separator can meet higher requirements put forward by high power lithium ion battery. HighlightsTissue paper was employed to fabricate lithium ion battery separator.Nano-SiO 2 hybrid crosslinked polymer electrolyte was constructed to modify tissue paper.The composite separator gave superior electrochemical performance and prominent rate capabilities.The designed coating layer was con rmed to increase mechanical strength, broaden electrochemical window and maintain cycle stability obviously.Excellent thermal stability and certain self-extinguishing were obtained for composite separator to afford security.

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“…Polyvinylidene fluoride (PVDF) is widely studied as a separator material for LIBs due to its superb electrochemical stability and strong thermal stability. Meanwhile, the β crystalline phase (TTTT molecular configuration) of semicrystalline PVDF shows a high dielectric constant and polarity, which is beneficial for lithium-ion dissociation and transportation in the electrolyte, hence higher ionic conductivity is achievable. , Besides, several kinds of ceramic nanoparticles (SiO 2 , ,− Al 2 O 3 , , TiO 2 , ZrO 2 , , etc.) have been studied as low-content additive fillers or coatings for composite membranes to improve their thermal stability.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, SiO 2 nanoparticles have the advantages of non-toxicity, non-pollution, low cost, and strong electronegativity . Different techniques have been explored to prepare the SiO 2 composite membrane, including (1) blending SiO 2 with polymers as fillers to form membranes by phase inversion or stretching processes, , (2) the electrospinning method, , and (3) coatings on PP or PE separators . For instance, Zhu et al used an electron beam irradiation method to prepare a SiO 2 -grafted PE separator, which improved the thermal stability of the separator (only 20% shrinkage at 180 °C).…”

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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Superior lithium battery separator with extraordinary electrochemical performance and thermal stability based on hybrid UHMWPE/SiO2 nanocomposites via the scalable biaxial stretching process

Cited by 34 publications

References 45 publications

Porous Sodium Alginate/Boehmite Coating Layer Constructed on PP Nonwoven Substrate as a Battery Separator through Polydopamine‐Induced Water‐Based Coating Method

Porous Sodium Alginate/Boehmite Coating Layer Constructed on PP Nonwoven Substrate as a Battery Separator through Polydopamine‐Induced Water‐Based Coating Method

Tissue paper-based composite separator using nano-SiO2 hybrid crosslinked polymer electrolyte as coating layer for lithium ion battery with superior security and cycle stability

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

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