Aluminum Hydroxide-based Flame Retardant Composite Separator for Lithium-ion Batteries

سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 489

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شناسه ملی سند علمی:

CLEANENERGY06_105

تاریخ نمایه سازی: 1 دی 1398

چکیده مقاله:

Despite the extensive use of polyolefins, especially as the lithium-ion battery (LIB) separators, their flammability limits them for large-scale battery applications. Therefore, fabrication of flame retardant LIB separators has attracted lots of attention in recent years. In this work, composite separators were prepared by applying a ceramic-based coating layer comprising a metal hydroxide as a filler and flame retardant agent (Al(OH)3) and a P(VDF-HFP) binder to the polypropylene (PP) commercial separator. Thermal shrinkage, thickness, air permeability, porosity and flammability of fabricated ceramic-coated composite separator were investigated. The results showed that the addition of Al(OH)3 particles improved thermal shrinkage (~8%) and flame retardancy of commercial separator which can prevent dimensional changes at high temperatures and significantly increase LIBs safety. Applied 11µm ceramic-based coating layer on PP commercial separator had 76% porosity which increased the value of air permeability from 278.15 (sec 100 ml-1) to 312.8 (sec 100 ml-1) suggests much facile air permeation through the pores of commercial separator than the composite one. Furthermore, suitable electrolyte wettability of ceramic coated separator (135%) facilitates ion transport through the pores. All these characteristics make the fabricated flame retardant Al(OH)3 composite separator an appropriate candidate to ensure the safety of large-scale LIB.

نویسندگان

A. Nahvi Bayani

Institute of Mechanics, Iranian Space Research Center, Shiraz, Iran

M. H. Moghim

Institute of Mechanics, Iranian Space Research Center, Shiraz, Iran

S. Bahadorikhalili

Institute of Mechanics, Iranian Space Research Center, Shiraz, Iran

A. M. Ghasemi

Institute of Mechanics, Iranian Space Research Center, Shiraz, Iran