Effect of lithium salts LiPF6 and LiBF4 on combustion properties of electrolyte with EC/PC/EMC under different pressures

Shibiao Qiao; Xiaokai Meng; Weiguo Cao; Shuo Yu; Changcheng Liu; Que Huang

Case Studies in Thermal Engineering (Feb 2022)

Effect of lithium salts LiPF6 and LiBF4 on combustion properties of electrolyte with EC/PC/EMC under different pressures

Shibiao Qiao,
Xiaokai Meng,
Weiguo Cao,
Shuo Yu,
Changcheng Liu,
Que Huang

Affiliations

Shibiao Qiao: School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China
Xiaokai Meng: Grid Shanxi Electric Power Research Institute, Taiyuan, 030001, China
Weiguo Cao: School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China; Corresponding author.
Shuo Yu: School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China; Corresponding author.
Changcheng Liu: School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China; Institute of Advanced Energy Materials and Systems, North University of China, Taiyuan, 030051, China; Corresponding author. School of Environment and Safety Engineering, North University of China, Taiyuan 030051, China.
Que Huang: School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China; Institute of Advanced Energy Materials and Systems, North University of China, Taiyuan, 030051, China; Corresponding authors. School of Environment and Safety Engineering, North University of China, Taiyuan 030051, China.

Journal volume & issue: Vol. 30
p. 101741

Abstract

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In this paper, the combustion properties of ethylene carbonate/propylene carbonate/ethyl methyl carbonate (EC/PC/EMC) with LiPF6 or LiPF4 were studied by cone calorimeter under various environmental pressures in Hefei (100.09 kPa), Lijiang (76.11 kPa) and Lhasa (65.23 kPa), respectively. The impact of lithium salts and pressure on the significant fire parameters of electrolyte such as flame temperature, mass loss rate (MLR) and heat release rate (HRR) were analyzed to evaluate the degree of thermal hazard. The experimental results showed that with the decrease of ambient pressure, the peak HRR (pHRR) and total heat release (THR) declined, and the combustion duration increased significantly. In the steady combustion stage of electrolyte pool fire, the mean value of MLR had an exponential relationship with the external pressure. The error of HRR obtained by oxygen consumption (OC) calorimetry and stoichiometric thermochemistry (TC) theory was about 15%.

Published in Case Studies in Thermal Engineering

ISSN: 2214-157X (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: http://www.journals.elsevier.com/case-studies-in-thermal-engineering/

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