Thermal properties and conductivity of the lithium bis(trifluoromethane)sulfonamide (LiTSFI) were studied in a temperature range of 60–270?°C by differential scanning calorimetry (DSC) and impedance spectroscopy methods. As shown by DSC technique, at the first heating, three endothermic effects associated with dehydration, phase transition, and melting were observed On subsequent cooling and heating, only the thermal effect due to the ionic salt melting was observed. These data were confirmed by conductivity measurements. On cooling the LiTSFI sample from the molten state an abrupt decrease in the conductivity due to crystallization into the high-temperature γ-phase was observed. Thus, according to the DSC and conductivity data, the high-temperature γ-phase may be easily quenched down to room temperature. The parameters of Arrhenius dependence of conductivity for γ-phase were estimated. It was shown that this phase has rather low ionic conductivity, below 10-6 S/cm near the melting point and cannot be regarded as orientationally disordered phase.

通過(guò)差示掃描量熱法（DSC）和阻抗譜法研究了雙（三氟甲烷）磺酰胺鋰（LiTSFI）在60–270 °C溫度范圍內(nèi)的熱性能和電導(dǎo)率。如DSC技術(shù)所示，在第一次加熱時(shí)，觀察到與脫水、相變和熔融相關(guān)的三種吸熱效應(yīng)，在隨后的冷卻和加熱中，僅觀察到離子鹽熔化引起的熱效應(yīng)。這些數(shù)據(jù)通過(guò)電導(dǎo)率測(cè)量得到證實(shí)。在將LiTSFI樣品從熔融狀態(tài)冷卻時(shí)，觀察到由于結(jié)晶到高溫γ相中，電導(dǎo)率突然下降。因此，根據(jù)DSC和電導(dǎo)率數(shù)據(jù)，高溫γ相可以很容易地淬火到室溫。估計(jì)了γ相電導(dǎo)率的阿倫尼烏斯依賴性參數(shù)。結(jié)果表明，該相具有相當(dāng)?shù)偷碾x子電導(dǎo)率，在熔融點(diǎn)附近低于10-6 S/cm