Microwave plasma‐initiated grafting of acrylic acid on Celgard 2500 membrane to prepare alkaline battery separators—Characteristics of process and product

Gancarz, Irena; Bryjak, Marek; Kunicki, Jerzy; Ciszewski, Aleksander

doi:10.1002/app.31596

Cited by 12 publications

(4 citation statements)

References 27 publications

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“…This separator has elongated pores of about 50 200 nm. [70,71] After a modification similar to that described in the following paragraphs, this microporous separator or others with even smaller pore sizes might be suitable for VRFB applications. Figure 5.…”

Section: Nonionic Separatorsmentioning

confidence: 99%

“…[71] The microporous, polyethylene-based separator Daramic (Daramic LLC) has been studied repeatedly for VRFB application over the last 20 years. According to the manufacturer, Daramic separators possess excellent oxidation stability as well as low ionic resistance.…”

Section: Nonionic Separatorsmentioning

confidence: 99%

“…The approach to use microporous separators instead of ionexchange membranes would be a tremendous cost-saving measure even though the currently available separators, which are used for other battery applications [69][70][71] cannot be incorporated into VRFBs as purchased. Studies have shown that reducing the pore size and functionalizing the material yields results on which future research can be based.…”

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confidence: 99%

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Membrane Development for Vanadium Redox Flow Batteries

et al. 2011

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Large-scale energy storage has become the main bottleneck for increasing the percentage of renewable energy in our electricity grids. Redox flow batteries are considered to be among the best options for electricity storage in the megawatt range and large demonstration systems have already been installed. Although the full technological potential of these systems has not been reached yet, currently the main problem hindering more widespread commercialization is the high cost of redox flow batteries. Nafion, as the preferred membrane material, is responsible for about 11% of the overall cost of a 1 MW/8 MWh system. Therefore, in recent years two main membrane related research threads have emerged: 1) chemical and physical modification of Nafion membranes to optimize their properties with regard to vanadium redox flow battery (VRFB) application; and 2) replacement of the Nafion membranes with different, less expensive materials. This review summarizes the underlying basic scientific issues associated with membrane use in VRFBs and presents an overview of membrane-related research approaches aimed at improving the efficiency of VRFBs and making the technology cost-competitive. Promising research strategies and materials are identified and suggestions are provided on how materials issues could be overcome.

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Section: Nonionic Separatorsmentioning

confidence: 99%

Section: Nonionic Separatorsmentioning

confidence: 99%

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confidence: 99%

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Membrane Development for Vanadium Redox Flow Batteries

et al. 2011

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“…One of the core technologies of an alkaline battery is the use of a synthetic fiber-based separator, which possesses the properties of high porosity, high strength, and solvent and corrosion resistance, and so on. Furthermore, the synthetic fiber-based separator especially adapts alkaline batteries to large capacity, low resistance, large output power, and long period of storage; therefore, synthetic fibers have become the important raw materials in production of alkaline battery separators. − …”

Section: Introductionmentioning

confidence: 99%

Wet-Laid Formation and Strength Enhancement of Alkaline Battery Separators Using Polypropylene Fibers and Polyethylene/Polypropylene Bicomponent Fibers as Raw Materials

Zhang

Hou

Liu

et al. 2017

Ind. Eng. Chem. Res.

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The handsheets of an alkaline battery separator were made of polypropylene (PP) fibers and polyethylene/polypropylene bicomponent sheath-core structure (EP) fibers in the wet-laid process followed by a hotpressing treatment. The effects of the process parameters in making the separator handsheets on the formation and the resultant tensile strength, maximum pore size, porosity, and alkali resistance were investigated. The results showed that a favorable formation could be obtained at the EP fibers addition level of not less than 20%. In addition, the tensile strength, maximum pore size, porosity, and alkali resistance of the separator handsheets made of 60% PP fibers and 40% EP fibers could meet the needs required in QB/T 4173 (2011), under the conditions of 1.5% PEO and 4.0% PVA additions (on oven-dry fibers), the hot-pressing pressure of 0.5 MPa, and the hot-pressing temperature of 135 °C for 90 s.

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Recent Development of Polyolefin‐Based Microporous Separators for Li−Ion Batteries: A Review

Heidari

Mahdavi

2019

The Chemical Record

119

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Secondary Li−ion batteries have been paid attention to wide‐range applications of power source for the portable electronics, electric vehicle, and electric storage reservoir. Generally, lithium‐ion batteries are comprised of four components including anode, cathode, electrolyte and separator. Although separators do not take part in the electrochemical reactions in a lithium‐ion (Li−ion) battery, they conduct the critical functions of physically separating the positive and negative electrodes to prevent electrical short circuit while permitting the free flow of lithium ions through the liquid electrolyte that fill in their open porous structure. Hence, the separator is directly related to the safety and the power performance of the battery. Among a number of separators developed thus far, polyethylene (PE) and polypropylene (PP) porous membrane separators have been the most dominant ones for commercial Li−ion batteries over the decades because of their superior properties such as cost‐efficiency, good mechanical strength and pore structure, electrochemical stability, and thermal shutdown properties. However, there are main issues for vehicular storage, such as nonpolarity, low surface energy and poor thermal stability, although the polyolefin separators have proven dependable in portable applications. Hence, in this review, we decide to provide an overview of the types of polyolefin microporous separators utilized in Li−ion batteries and the methods employed to modify their surface in detail. The remarkable results demonstrate that extraordinary properties can be exhibited by mono‐ and multilayer polyolefin separators if they are modified using suitable methods and materials.

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Microwave plasma‐initiated grafting of acrylic acid on Celgard 2500 membrane to prepare alkaline battery separators—Characteristics of process and product

Cited by 12 publications

References 27 publications

Membrane Development for Vanadium Redox Flow Batteries

Membrane Development for Vanadium Redox Flow Batteries

Wet-Laid Formation and Strength Enhancement of Alkaline Battery Separators Using Polypropylene Fibers and Polyethylene/Polypropylene Bicomponent Fibers as Raw Materials

Recent Development of Polyolefin‐Based Microporous Separators for Li−Ion Batteries: A Review

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