Binder-less chemical grafting of SiO2 nanoparticles onto polyethylene separators for lithium-ion batteries

Na, Wonjun; Koh, Ki Hwan; Lee, Albert S.; Cho, Sangho; Ok, Byoeri; Hwang, Suk Won; Lee, Jun Young; Koo, Chong Min

doi:10.1016/j.memsci.2018.12.039

Cited by 97 publications

(32 citation statements)

References 31 publications

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“…To solve these drawbacks of polyolefin separators, many methods such as ceramic coating, paper‐making process, and electrospinning have been proposed 9–12 . Although surface coating can improve the wettability and thermal properties of separators, the peeling coating may lead to poor electrolyte permeability 13,14 .…”

Section: Introductionmentioning

confidence: 99%

Electron beam irradiation modified electrospun polyvinylidene fluoride/polyacrylonitrile fibrous separators for safe lithium‐ion batteries

Jia

Huang

Long

et al. 2020

J of Applied Polymer Sci

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This work aims to obtain more hydrophilic and thermal stable electrospun fibrous membranes for lithium‐ion battery separators. For this purpose, the polyvinylidene fluoride/polyacrylonitrile (PVDF/PAN) separators are fabricated via electrospinning and modified by an electron beam with different doses. These preparation processes are simple, fast, and environmentally friendly. As the same time, the physical and electrochemical properties of these separators are investigated in detail. The results indicated that all the irradiated PVDF/PAN (the mass ratio of PVDF and PAN is 1:1) separators can maintain a complete structure till 170°C due to their cross‐linking structure. Besides, the 150‐kGy‐irradiated PVDF/PAN separator exhibits high porosity (82%), excellent electrolyte absorption (497%), and high ionic conductivity (3.19 mS cm−1). As a consequence, the cells with 150‐kGy‐irradiated PVDF/PAN separators show better the C‐rate performance and cycling stability than those of the cells with polypropylene separators and nonirradiated PVDF/PAN separators.

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Section: Introductionmentioning

confidence: 99%

Electron beam irradiation modified electrospun polyvinylidene fluoride/polyacrylonitrile fibrous separators for safe lithium‐ion batteries

Jia

Huang

Long

et al. 2020

J of Applied Polymer Sci

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“…For the DSC analysis, the endothermic peak of the PE separator is located around 150°C caused by the melting of PE. Two endothermic peaks of the PET/ceramic non-woven separator appear around and 255°C, which are ascribed to the melting of the binder and PET [36][37][38] . The DSC analysis reveals that the beginning melting temperature of the PET separator is 220°C, which is much higher than that of the PE separator.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, it is necessary to develop new types of single polymer or composite separators to fulfill the thermal stability requirements of LIBs [28–33] . Ceramic‐based composite separators are prepared to mitigate the performance‐limitations of the conventionally used separator [34–39] . Nonwoven fabric based separators with excellent thermal stability and higher electrolyte take‐up are also getting more attentions recently [40–41] .…”

Section: Introductionmentioning

confidence: 99%

“…[28][29][30][31][32][33] Ceramic-based composite separators are prepared to mitigate the performance-limitations of the conventionally used separator. [34][35][36][37][38][39] Nonwoven fabric based separators with excellent thermal stability and higher electrolyte take-up are also getting more attentions recently. [40][41] However, the TR mechanism in LIBs is still controversial in regard to the roles of anode and cathode.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Safety Performance of Automotive Lithium‐Ion Batteries with Al₂O₃‐Coated Non‐Woven Separator

Meng

Gao

Zhang

et al. 2020

Batteries & Supercaps

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Thermal runaway (TR) is the fatal safety defects that hinder the wide application of automotive batteries. The short circuit caused by shrinkage of separators under high temperatures leads to TR. In this paper, we demonstrate the robust thermal stability of an Al2O3 coated non‐woven polyethylene terephthalate (PET) separator. The shrinkage ratio of the Al2O3 coated separator has been compared with the non‐coated polyethylene (PE) separator by differential scanning calorimetry (DSC), thermogravimetry (TG ) and heat nail tests. Automotive lithium‐ion batteries (LIBs) with large capacities have been used to conduct the simulations of nail penetration. TR is found to be triggered by Joule heat generation during the shrinkage of the separators. The separator with lower shrinkage retains highly stable dimension against wide range temperature changes. This feature enables the Al2O3 coated separator to prevent inner short circuits. The improved safety performance indicates a promising prospect of Al2O3 coated non‐woven separators in LIBs.

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“…The LIBs with SiO 2 /PAM grafted PP separator also deliver better electrochemical performances in contrast with PP separator. Recently, Na et al grafted SiO 2 nanoparticles on PE separator to improve the adhesion strength, thermal stability, and electrochemical performances of PE separator. Initially, PE separator is activated with ultraviolet ozone and followed by saline hybridization and coating of SiO 2 .…”

Section: Types Of Separatorsmentioning

confidence: 99%

Recent Development in Separators for High‐Temperature Lithium‐Ion Batteries

Waqas

Ali

Feng

et al. 2019

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metric tons of carbon dioxide (CO 2 ) and other pollutants per year, which accelerate global warming and major climate changes. [2] In order to mitigate these serious issues caused by fossil fuels and to compete with the energy generating devices based on fossil fuels, renewable energy sources like solar energy, wind energy, bioenergy, and geothermal energy are potential alternative power resources. However, these renewable energy resources need highly efficient energy storage devices for integrating and well distribution of energy. Rechargeable battery technology with high energy, high power density, long life cycle capability, fast cycling rate, and reasonable cost is the possible solution to store energy obtained from these renewable sources. [3] Among many rechargeable energy storage devices, lithium-ion batteries (LIBs) are the promising energy sources for integrating renewable resources and high power applications, owing to high energy density, lightweight, high flexibility, slow self-discharge rate, high rate charging capability, long battery life, and environmental benignity. [4,5] The aforementioned attractive properties of rechargeable LIBs promote its utilization in the wide range of applications like laptops, cell phones, electric vehicle, hybrid electric vehicles, renewable power stations, stationary electric power, defense arsenal, subsurface exploration, thermal reactors, and space vehicles. [6][7][8][9] From the last 30 years, rapid development has been observed in LIBs technology. Presently, LIBs hold twofold energy density as compared to the first commercial LIBs developed by Sony in 1991, but still, there are some challenges associated with LIBs that need to be solved for achieving high power density and efficient performances at high and low temperatures. Safety, cost, and enhancement in energy and power densities are the major concerns in next generation LIBs. [10][11][12] Separator is one of the important components of LIBs that is not directly involved in the electrochemical reaction, however, its properties, structure, and composition greatly influence the performance of batteries with respect to internal resistance, long cycle performances, high capacity, and safety. [13] The basic functions of the separator are to prevent the contact between anode and cathode to avoid internal short circuits, store liquid electrolyte, and permit the migration of ions during the chargedischarge process. [14][15][16] The ideal separator should possess Lithium-ion batteries (LIBs) are promising energy storage devices for integrating renewable resources and high power applications, owing to their high energy density, light weight, high flexibility, slow self-discharge rate, high rate charging capability, and long battery life. LIBs work efficiently at ambient temperatures, however, at high-temperatures, they cause serious issues due to the thermal fluctuation inside batteries during operation. The separator is a key component of batteries and is crucial for the sustainability of LIBs at high-temperatures. Th...

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Binder-less chemical grafting of SiO2 nanoparticles onto polyethylene separators for lithium-ion batteries

Cited by 97 publications

References 31 publications

Electron beam irradiation modified electrospun polyvinylidene fluoride/polyacrylonitrile fibrous separators for safe lithium‐ion batteries

Electron beam irradiation modified electrospun polyvinylidene fluoride/polyacrylonitrile fibrous separators for safe lithium‐ion batteries

Enhanced Safety Performance of Automotive Lithium‐Ion Batteries with Al₂O₃‐Coated Non‐Woven Separator

Recent Development in Separators for High‐Temperature Lithium‐Ion Batteries

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Binder-less chemical grafting of SiO2 nanoparticles onto polyethylene separators for lithium-ion batteries

Cited by 97 publications

References 31 publications

Electron beam irradiation modified electrospun polyvinylidene fluoride/polyacrylonitrile fibrous separators for safe lithium‐ion batteries

Electron beam irradiation modified electrospun polyvinylidene fluoride/polyacrylonitrile fibrous separators for safe lithium‐ion batteries

Enhanced Safety Performance of Automotive Lithium‐Ion Batteries with Al2O3‐Coated Non‐Woven Separator

Recent Development in Separators for High‐Temperature Lithium‐Ion Batteries

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Enhanced Safety Performance of Automotive Lithium‐Ion Batteries with Al₂O₃‐Coated Non‐Woven Separator