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Kinetics of Thermal Decomposition of Lithium Hexafluorophosphate
Xiao-min Liu*,Hui Yang
Author NameAffiliationE-mail
Xiao-min Liu* College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China lxm3799@yahoo.com 
Hui Yang College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China  
Abstract:
With on-line coupled thermo-gravimetric analyzer-Fourier transform infrared spectrometer technique, the thermal decomposition of lithium hexafluorophosphate (LiPF6) and its gas evolution at inert environment (H2O<10 ppm) were studied under both non-isothermal and isothermal conditions. The results showed that the LiPF6 decomposition is a single-stage reaction with LiF as final residue and PF5 as gas product. In addition, its decomposi-tion kinetics was determined as 2D phase boundary movement (cylindrical symmetry) under both non-isothermal and isothermal conditions. Furthermore, the activation energy of LiPF6 decomposition was calculated as 104 and 92 kJ/mol for non-isothermal and isothermal con-ditions, respectively.
Key words:  Lithium hexafluorophosphate, Decomposition kinetics, Online coupled thermo-gravimetric analyzer-Fourier transform infrared spectrometer
FundProject:
六氟偏磷酸锂的热分解动力
刘晓敏*,杨晖
摘要:
采用在线耦合TGA-FTIR技术,分别研究了非等温和等温两种条件下六氟磷酸锂(LiPF6)的热分解动力学和其气态产物. 结果表明LiPF6分解反应为单步反应,其产物为固态LiF和气态PF5. 在两种条件下,LiPF6分解动力学均遵循基于柱坐标对称的二维相界面移动模型. LiPF6分解活化能为104 kJ/mol(非等温)和92 kJ/mol(等温).
关键词:  六氟偏磷酸锂,分解动力学,在线耦合TGA-FTIR
DOI:10.1063/1674-0068/26/04/467-470
分类号: