Studies on the thermal decomposition kinetics of LiPF6 and LiBC4O8

Journal of Chemical Sciences

Li Fa-Qiang¹  Ren Qi-Du1¹  Cui Xiao-Ling¹  Li Shi-You1 2¹  Ma Pei-Hua¹ 

[1] Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810 008, China$$

关键词: LiPF6;    LiBOB;    TG-DTG;    non-isothermal kinetics;    isothermal kinetics.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

Thermal decomposition of LiPF6 and LiBC4O8 (lithium bis(oxalate)borate, abbreviated as LiBOB) were studied using TG (thermogravimetry)-DTG (derivative thermogravimetry) method with different heating rate 𝛽 of 5, 10, 20 and 40°C min-1 or at different constant temperature 𝜃C (109.80, 118.79, 148.41, 176.86 °C for LiPF6 and 278.51, 298.13, 317.65, 336.13 for LiBOB). From the nonisothermal kinetics we calculate that 𝑛LiPF6 is 1.01, 𝑛LiBOB is 1.04, 𝐸LiPF6 is 91907.61 J/mol, and 𝐸LiBOB is 205179.88 J/mol; from the isothermal kinetics we calculate that n for both LiPF6 and LiBOB are 1, 𝐸LiPF6 is 91907.61 J/mol, 𝐸LiBOB is 205179.88 J/mol, lnALiPF6 is 16.89 s-1, and lnALiBOB is 31.96 s-1. The results obtained from the two ways have minor differences and can validate each other.

【 授权许可】

Unknown