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Effect of flame retardant hexafluorocyclotriphosphazene on combustion characteristics of electrolyte for lithium-ion batteries

电解质 锥形量热计 闪点 阻燃剂 燃烧 材料科学 烟雾 锂(药物) 可燃性 环境科学 废物管理 化学工程 复合材料 化学 气象学 烧焦 有机化学 工程类 电极 物理 医学 物理化学 内分泌学
作者
Changcheng Liu,Yuliang Zhao,Shibiao Qiao,Kaihui Zheng,Yuhao Wang,Zhihua Sun,Taixin Liang,Chunfang Fan,Tiannian Zhou,Que Huang
出处
期刊:Case Studies in Thermal Engineering [Elsevier BV]
卷期号:58: 104383-104383
标识
DOI:10.1016/j.csite.2024.104383
摘要

Hexafluorocyclotriphosphazene (HFPN) is a promising flame retardant to be applied in lithium-ion batteries (LIBs) to decrease the fire risk during the treatment of electrolyte. In this manuscript, the influence of HFPN on the combustion characteristics of LIB electrolyte was investigated, the combustion behaviors and flame retardancy of the electrolyte with or without HFPN were systematically studied by using cone calorimeter, flash point meter and a series of standard equipment, as well as self-made water spray fire extinguishing platform. The flash points of 3 kinds of control group as base solution and 3 kinds of flame-retarded electrolyte were measured and obtained by SCKB3000 closed cup automatic flash point tester. The combustion characteristics of 6 types of electrolytes were analyzed by a cone calorimeter. The heat release rate (HRR), fire growth index (FGI), fire magnitude index (FMI) and other important combustion parameters of the electrolytes were studied. Based on the self-made water mist fire extinguishing platform, the fire extinguishing effect on 6 kinds of electrolytes under the same water mist condition was compared, and the influence of flame retardants in the fire extinguishing process was analyzed. The results showed that the change of flash point was obviously related to the composition of electrolyte. Flame retardant could reduce the peak HRR (pHRR) during electrolyte fire to a large extent, while it could also prolong the combustion duration of electrolyte pool fire. Under the action of fine water mist, the electrolyte pool fire would quickly extinguish, but there would remain a lot of smoke.
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