Synthesis and electrochemical performance of poly(vinylidene fluoride)/SiO2 hybrid membrane for lithium-ion batteries

Xia, Yang; Li, Jiaojiao; Wang, Hongjie; Ye, Zhangjun; Zhou, Xiaozheng; Huang, Hui; Gan, Yongping; Liang, Chao; Zhang, Jun; Zhang, Wenkui

doi:10.1007/s10008-018-4161-2

Cited by 32 publications

(16 citation statements)

References 51 publications

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“…A combination of different methods has also been employed to fabricate composite and multilayer-polymer separators with high thermal stability for LIBs. [225][226][227] A high-performance SiO 2 @(PI/SiO 2 ) hybrid separator with PI core and SiO 2 nanoshell was fabricated by combining electrospinning and in-situ hydrolysis techniques [see Figure 9a]. [228] In this unique structure, the SiO 2 nano-shell [see Figure 9b,c] acts as a robust protection layer for improving the thermal stability of the SiO 2 @(PI/SiO 2 ) separator, which shows a "zero" shrinkage at 300 °C.…”

Section: Other Miscellaneous Methodsmentioning

confidence: 99%

A Critical Review on Materials and Fabrications of Thermally Stable Separators for Lithium‐Ion Batteries

Wang

Shen

et al. 2021

Adv Materials Technologies

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Li‐ion batteries nowadays are widely used as energy storage systems owing to their high power and energy densities. However, the safety of Li‐ion batteries has increasingly become a grave concern, and how to effectively mitigate or avoid the thermal runaway of Li‐ion batteries, particularly during fast charging/discharging, is a critical issue. It has been pointed out that among various factors governing the safety of Li‐ion batteries, the thermal stability of separators plays an important role. In this review, a critical discussion is reported on recent research and development of thermally stable separators, including surface modified polyolefin separators, novel polymer separators, inorganic structured separators, and functional smart separators, for improving the safety of Li‐ion batteries, summarizing different techniques, processes, and materials being researched and developed for these separators for lithium‐ion batteries. Finally, suggestions are provided on future directions to develop thermally stable separators with respect to the safety of next‐generation Li‐ion batteries.

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Section: Other Miscellaneous Methodsmentioning

confidence: 99%

A Critical Review on Materials and Fabrications of Thermally Stable Separators for Lithium‐Ion Batteries

Wang

Shen

et al. 2021

Adv Materials Technologies

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“…At elevated temperatures, separators with low thermal stability could cause some safety issues. Designing separator with highly porous structure and high thermal stability are crucial for high performance lithium ion batteries [48][49][50][51]. Electrospun nanofiber membranes have been presented and superior electrochemical performance was obtained by using highly porous separators.…”

Section: Nano Fiber Separator Membranes For Lithium Ion Batteriesmentioning

confidence: 99%

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2020

IJNN

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Porous composite nano fibre membranesChemical precipitation, membrane filtration, electrochemical methods, ion exchange, adsorption, and so on, are some methods considered in heavy metal removal from water [26,27]. The adsorption is considered to be the most significant of the different methods to remove heavy metal from water, owing to its economy, versatility, energy-efficiency, and requirement of no additional reagents [28,29]. Electrospun nanofibers have been widely used as nanofibrous adsorbents for removal of heavy metals from aqueous solutions, due to their large specific surface area, high porosity, and small interconnected pores [30][31][32][33][34][35]. A wide variety of low-cost adsorbents such as algae, chitosan, alginate, fungi, tea polyphenols (TPs), and lignin were studied to evaluate their potential as viable

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“…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 . 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 . Especially, poor thermal stability makes the separator shrink severely in high-temperature situations, eventually leading to thermal runaway or even explosion, which greatly hinders the application of LIBs in next-generation EVs .…”

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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Synthesis and electrochemical performance of poly(vinylidene fluoride)/SiO2 hybrid membrane for lithium-ion batteries

Cited by 32 publications

References 51 publications

A Critical Review on Materials and Fabrications of Thermally Stable Separators for Lithium‐Ion Batteries

A Critical Review on Materials and Fabrications of Thermally Stable Separators for Lithium‐Ion Batteries

Untitled

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

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