Failure analysis with a focus on thermal aspect towards developing safer Na-ion batteries
Li Yuqi1, 2, Lu Yaxiang1, 3, †, Chen Liquan1, 2, 3, Hu Yong-Sheng1, 2, 3, ‡
       

(a) Temperature vs. time plot of the charged NaNi1/3Fe1/3Mn1/3O2/hard carbon full cell under thermal stability testing with ARC. (b) Schematic representation summarizing thermal decomposition process of charged NaNi1/3Fe1/3Mn1/3O2 with different condition depending on the temperatures.[11] (c) Thermal analysis (TG-DSC) curves of the desodiated state NaFeP2O7 under steady Ar flow. (d) Enthalpy diagram of Na2–xFeP2O7 polymorphs.[14] (e) Schematic summary of cathode–electrolyte interfacial chemistry induced battery degradation mechanism.[15] (f) Thermal mechanism of de-sodiated Na0.5CrO2 at high temperature.[16]