Lee, Yongho Lim, Hyojun Kim, Sang-Ok Kim, Hyung-Seok Kim, Ki Jae Lee, Kwan-Young Choi, Wonchang 2024-01-19T21:32:12Z 2024-01-19T21:32:12Z 2021-09-04 2018-11 2050-7488 https://pubs.kist.re.kr/handle/201004/120752 The thermal behavior of fully lithiated and sodiated Sn electrodes cycled in a MePF6 (Me = Li or Na)-based electrolyte was studied using differential scanning calorimetry (DSC). The sodiated Sn electrode cycled in the NaPF6-based electrolyte showed a thermal reaction with much greater heat generation (1719.4 J g(-1)) during the first exothermic reaction corresponding to the thermal decomposition reaction of the solid electrolyte interface (SEI) layer, compared to that of the lithiated Sn electrode (647.7 J g(-1)) in the LiPF6-based electrolyte because of the formation of a thicker surface film on the Sn electrode. The NaPF6-based electrolyte yielded a slightly less conductive and/or a thicker SEI layer than the NaClO4-based electrolyte, resulting in the intense thermal decomposition of the SEI layer. The DSC results for the fully sodiated Sn electrode cycled in FEC-containing electrolytes clearly demonstrate that an exothermic reaction corresponding to the SEI decomposition mostly disappears because of the formation of a thermally stable and thin SEI layer on active materials via the electrochemical decomposition of FEC. X-ray photoelectron spectroscopy reveals the formation of SEI with a relatively high proportion of NaF, which is known to be a thermally stable inorganic solid at high temperatures. English ROYAL SOC CHEMISTRY Thermal stability of Sn anode material with non-aqueous electrolytes in sodium-ion batteries Article 10.1039/c8ta07854h 1 JOURNAL OF MATERIALS CHEMISTRY A, v.6, no.41, pp.20383 - 20392 JOURNAL OF MATERIALS CHEMISTRY A 6 41 20383 20392 N scie scopus 000448412700052 2-s2.0-85055513845 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article FLUOROETHYLENE CARBONATE LIQUID ELECTROLYTES NEGATIVE ELECTRODES VINYLENE CARBONATE ENERGY-STORAGE LITHIUM REACTIVITY SOLVENTS TEMPERATURE ACCELERATING RATE CALORIMETRY sodium-ion batteries anode materials Sn non-aqueous electrolytes thermal stability