Flexible and heat-resistant polyphenylene sulfide ultrafine fiber hybrid separators for high-safety lithium-ion batteries
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Separator (oil production)
Polyolefin
Thermal Stability
Polyolefin has been had an important position in synthetic materials and general polymer materials. The reasons why polyolefin is difficult to be bonded were introduced, and based on this,the pretreatment methods of polyolefin materials and the latest research development of all kinds of adhesive for polyolefin at home and abroad are summarized. At the same time, the trend and prospect of polyolefin are put forward in this paper.
Polyolefin
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This specification applies to flexible closed-cell materials made from polyolefin plastics and blends of polyolefin plastics. Two types of flexible, closed-cell polyolefin foams are covered: type I - closed cell foams made with polyolefin plastics and either chemically or radiation crosslinked, and type II - closed cell foams made with polyolefin plastics that are non-crosslinked. Cellular polyolefin foams furnished under this specification shall be manufactured from any resin or blend of resins that are members of the polyolefin family together with added compounding materials. Unless otherwise specified, the color of cellular polyolefin foams shall be natural.
Polyolefin
Compounding
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Polyolefin/non-polyolefin hybrid materials, named 'Polyolefin Hybrids', which are block, graft copolymers, have been synthesized via controlled/living radical polymerizations using a polyolefin macroinitiator. Polyolefin hybrids show a microphase separated morphology composed of polyolefin and non-polyolefin segments and display various enhanced physical properties by the selection of non-polyolefin segments. In addition, they exhibit a remarkable compatibility toward polyolefin and non-polyolefin blend polymers leading to the development of new polymer alloy materials. As an example of the polyolefin hybrids, the surface-polar-polymer-grafted polypropylene sheets that exhibit high hydrophilicity, electroconductivity, and antibacterial property is obtained. Thus, polyolefin hybrids are valuable value-added polyolefins.
Polyolefin
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This specification applies to flexible closed-cell materials made from polyolefin plastics and blends of polyolefin plastics. Two types of flexible, closed-cell polyolefin foams are covered: type I - closed cell foams made with polyolefin plastics and either chemically or radiation crosslinked, and type II - closed cell foams made with polyolefin plastics that are non-crosslinked. Cellular polyolefin foams furnished under this specification shall be manufactured from any resin or blend of resins that are members of the polyolefin family together with added compounding materials. Unless otherwise specified, the color of cellular polyolefin foams shall be natural.
Polyolefin
Compounding
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Polyolefin
Separator (oil production)
Surface Modification
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Polyolefin
Separator (oil production)
Thermal Stability
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This specification applies to flexible closed-cell materials made from polyolefin plastics and blends of polyolefin plastics. Two types of flexible, closed-cell polyolefin foams are covered: type I - closed cell foams made with polyolefin plastics and either chemically or radiation crosslinked, and type II - closed cell foams made with polyolefin plastics that are non-crosslinked. Cellular polyolefin foams furnished under this specification shall be manufactured from any resin or blend of resins that are members of the polyolefin family together with added compounding materials. Unless otherwise specified, the color of cellular polyolefin foams shall be natural.
Polyolefin
Compounding
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The intrinsically low electrolyte affinity of polyolefin separators limits their electrochemical performance in lithium ion battery. Most of the traditional modification methods which improve the polyolefin separator's electrolyte affinity either rely on the use of thick coating layer that may decrease energy density of the battery or involve multiple laborious steps, making them less competitive for practical applications. Herein, we report a photo-induced functionalization that could significantly improve the electrolyte affinity of the polypropylene separator within 3 minutes. We find that the electrolyte saturated functionalized separator shows improved ionic conductivity, increased lithium ion transfer number, and thus excellent charge-discharge performance. Our results not only demonstrate the high potential of the functionalized separator, but also suggest that the photo-induced functionalization could be used as a general strategy to endow polyolefin separator with task-specific properties required for different battery applications.
Polyolefin
Separator (oil production)
Surface Modification
Polypropylene
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The poor thermal stability of polyolefin separator greatly limits the output performance and safety performance of a lithium ion battery at high temperature. Herein, we report a novel silicone grafted polyolefin separator prepared by a simple solution process and its lithium ion battery performance. Despite its low coating thickness, the grafted silicone coating significantly improved the thermal stability of polyolefin separator. In addition, the silicone grafted separator shows enhanced electrolyte affinity. Due to these favorable features, the novel separator exhibits enhanced battery performance at a high temperature of 80 °C. Our results suggest that the silicone grafted separator could be potentially used in practical battery applications.
Polyolefin
Separator (oil production)
Thermal Stability
Polypropylene
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This specification applies to flexible closed-cell materials made from polyolefin plastics and blends of polyolefin plastics. Two types of flexible, closed-cell polyolefin foams are covered: type I - closed cell foams made with polyolefin plastics and either chemically or radiation crosslinked, and type II - closed cell foams made with polyolefin plastics that are non-crosslinked. Cellular polyolefin foams furnished under this specification shall be manufactured from any resin or blend of resins that are members of the polyolefin family together with added compounding materials. Unless otherwise specified, the color of cellular polyolefin foams shall be natural.
Polyolefin
Compounding
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