The thermal stabilities of Na- and Li-intercalated hard carbons were examined by differential scanning calorimetry (DSC) to determine whether Na-ion batteries or Li-ion batteries exhibit superior thermal stability. The DSC profiles of both C₆Na_0.65 and C₆Li_0.65 displayed sharp exothermic peaks with enthalpy changes of ~1200 J·g⁻¹, which could be attributed to the reaction between C₆Na_0.65 (or C₆Li_0.65) and PF₅. Hence, the total amounts of heat generated in these Na- and Li-ion batteries were equal, regardless of the intercalants present. However, the temperatures corresponding to the maximum exothermic peaks differed between the two battery systems (i.e., 184 °C for C₆Na_0.65 and 264 °C for C₆Li_0.65), indicating that Na-ion batteries are less thermally stable. The DSC profile of C₆Li_0.25Na_0.37 revealed that this difference is due to differences in the solid-electrolyte interphase films between C₆Na_x and C₆Li_y.

通过差示扫描量热法（DSC）检查了插有Na和Li的硬碳的热稳定性，以确定Na离子电池或Li离子电池是否表现出优异的热稳定性。C ₆ Na _0.65和C ₆ Li _0.65的DSC谱均显示出尖锐的放热峰，焓变约为1200 J·g ^-1，这可能归因于C ₆ Na _0.65（或C ₆ Li _0.65）与C ₆ Na _0.65之间的反应。PF ₅。因此，无论存在哪种嵌入剂，在这些Na和Li离子电池中产生的热量总量都是相等的。但是，在两个电池系统之间，对应于最大放热峰的温度有所不同（即C ₆ Na _0.65为184 °C，C ₆ Li _0.65为264°C ），这表明Na离子电池的热稳定性较差。C ₆ Li _0.25 Na _0.37的DSC图谱表明，该差异是由于C ₆ Na _x和C ₆ Li _y之间的固体电解质中间相膜的差异引起的。