Kinetics of Thermal Decomposition of Lithium Hexafluorophosphate |
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Authors: | Xiao-min Liu Hui Yang |
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Institution: | College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China |
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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. |
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Keywords: | Lithium hexafluorophosphate Decomposition kinetics Online coupled thermo-gravimetric analyzer-Fourier transform infrared spectrometer |
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