Surface‐modified polyethylene separator with hydrophilic property for enhancing the electrochemical performance of lithium‐ion battery

Ahn, Yong-keon; Kwon, Yong Kab; Kim, Ki Jae

doi:10.1002/er.5401

Cited by 22 publications

(10 citation statements)

References 39 publications

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“…Furthermore, in the same separator type and with the objective of enhancing thermal runaway, melaminebased porous organic polymer (POP) coatings [213] were implemented. In fact, different materials have been used as a layer on the surface of polyolefin separators to improve its wettability, including polyethyleneimine (PEI)/dopamine coating layer [188], Al 2 O 3 layers in electrospun PVDF nanofibers [193], ammonium persulfate (APS) coating [194], a phenolic resin (AF) layer with immersion in situ reaction [186], a thin layer of lowdensity polyethylene microspheres [199], polyamine (PAI) containing natural clay nanorods (attapulgite, ATP) [197], and polyvinyl alcohol (PVA) [214], TiO 2 [215], Al 2 O 3 [216], UVinduced graft with polar methyl acrylate (MA) [217], and polyimide (PI)-SiO 2 layers [218].…”

Section: Separator Membranementioning

confidence: 99%

Recent Advances on Materials for Lithium-Ion Batteries

et al. 2021

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Environmental issues related to energy consumption are mainly associated with the strong dependence on fossil fuels. To solve these issues, renewable energy sources systems have been developed as well as advanced energy storage systems. Batteries are the main storage system related to mobility, and they are applied in devices such as laptops, cell phones, and electric vehicles. Lithium-ion batteries (LIBs) are the most used battery system based on their high specific capacity, long cycle life, and no memory effects. This rapidly evolving field urges for a systematic comparative compilation of the most recent developments on battery technology in order to keep up with the growing number of materials, strategies, and battery performance data, allowing the design of future developments in the field. Thus, this review focuses on the different materials recently developed for the different battery components—anode, cathode, and separator/electrolyte—in order to further improve LIB systems. Moreover, solid polymer electrolytes (SPE) for LIBs are also highlighted. Together with the study of new advanced materials, materials modification by doping or synthesis, the combination of different materials, fillers addition, size manipulation, or the use of high ionic conductor materials are also presented as effective methods to enhance the electrochemical properties of LIBs. Finally, it is also shown that the development of advanced materials is not only focused on improving efficiency but also on the application of more environmentally friendly materials.

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Section: Separator Membranementioning

confidence: 99%

Recent Advances on Materials for Lithium-Ion Batteries

et al. 2021

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“…Finally, surface modification of PE films by physical treatment has been conducted through methods such as plasma and electron beam irradiation [26,27]. In addition, it has been demonstrated that the PE surface can be changed into a hydrophilic surface through chemical treatment [28][29][30][31][32]. The grafting and coating methods of polymer and/or inorganic materials have proven to be effective in improving the properties of the PE separator for LIBs.…”

Section: Introductionmentioning

confidence: 99%

Surface Modification of Polyethylene Separator for Li-Ion Batteries via Imine Formation

Baek

Yoo

Kim

et al. 2023

International Journal of Energy Research

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Porous polyethylene (PE) polymer film is a representative material for separators in Li-ion batteries (LIBs). Although PE separators are widely used in commercial LIBs owing to several advantages such as chemical stability, low cost, and good processability, the material still suffers from poor wettability to organic liquid electrolytes and low thermal stability. In this study, a facile surface modification method via the nucleophilic addition of amine in a solution is proposed. To improve the electrolyte wettability and thermal stability of the PE separators, a carbonyl group (C=O) was introduced onto the surface by pretreatment. Then, an imine functional group (R–N=C) was created by the conversion reaction between the carbonyl and amine groups (R-NH2) in a poly(ethylene glycol) bis(amine) solution. By including the formed imine group onto the surface, the surface-modified PE separator exhibited enhanced wettability and thermal stability. The chemical surface treatment transformed the PE separator from hydrophobic to hydrophilic, resulting in the increased ionic conductivity of the electrolyte and rate capability of the cells without any negative effect on the physical and electrochemical properties of the separator.

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“…[1][2][3] A separator is an important part of LIB that enables the free transmission of lithium ion (Li + ) and prevents the direct contact between electrodes. [4][5][6] Currently, polyethylene (PE) and polypropylene (PP) microporous membranes have been widely applied in commercial LIBs. However, polyolefin membranes present poor dimensional thermal stability and are prone to thermal shrinkage at high temperature; these factors may cause internal electrodes to contact and create a short circuit, which results in fires and explosions.…”

Section: Introductionmentioning

confidence: 99%

The Enhanced Performance of Polyethylene Composite Separators by the Modification of Lithium Salt@SiO₂ Nanoparticles

You

Duan

et al. 2021

Macro Materials & Eng

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Improving the dimensional thermal stability and electrochemical performance of polyethylene (PE) membrane is critical to enhance the safety performance of lithium-ion battery. In this paper, PE membranes are modified by lithium bis(trifuoromethanesulfonyl)imide (LiTFSI) solution and then coated with nano-SiO 2 /polyvinyl alcohol solution to obtain composite membranes (PE@LnSiO 2 , where n represents the concentration of LiTFSI solution). The obtained PE@L4SiO 2 (LiTFSI solution concentration is 4%) composite membrane possesses a thermal shrinkage rate of only 17% at 150°C, which is far superior to that of the PE separator. The ionic conductivity of the composite membrane is 16.9 × 10 −4 S cm −1 at room temperature (RT), and the battery impedance decreases to 154 , which is remarkably better than that of the PE membrane (188 ). The battery delivers a reversible discharge capacity of 164 mAh g −1 at 0.2 C under RT after 250 cycles, and the coulomb efficiency remains above 99%. The battery also has a high discharge capacity of 132 mAh g −1 at 2 C, which indicates that it has excellent rate performance. Therefore, this research successfully explores a simple method to effectively improve the dimensional thermal stability of PE separator, as well as the electrochemical and safety performance of lithium battery.

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Surface‐modified polyethylene separator with hydrophilic property for enhancing the electrochemical performance of lithium‐ion battery

Cited by 22 publications

References 39 publications

Recent Advances on Materials for Lithium-Ion Batteries

Recent Advances on Materials for Lithium-Ion Batteries

Surface Modification of Polyethylene Separator for Li-Ion Batteries via Imine Formation

The Enhanced Performance of Polyethylene Composite Separators by the Modification of Lithium Salt@SiO₂ Nanoparticles

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Surface‐modified polyethylene separator with hydrophilic property for enhancing the electrochemical performance of lithium‐ion battery

Cited by 22 publications

References 39 publications

Recent Advances on Materials for Lithium-Ion Batteries

Recent Advances on Materials for Lithium-Ion Batteries

Surface Modification of Polyethylene Separator for Li-Ion Batteries via Imine Formation

The Enhanced Performance of Polyethylene Composite Separators by the Modification of Lithium Salt@SiO2 Nanoparticles

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The Enhanced Performance of Polyethylene Composite Separators by the Modification of Lithium Salt@SiO₂ Nanoparticles