fig2

Figure 2. (A) Comparison of thermal stability among mainstream SSEs and LEs, in which T_d refers to the decomposition temperature of the material based on experimental or calculated values. The T_d values of halide-based SSEs are estimated from studies on their high-temperature performance and are therefore indicated by dashed circles. Adapted from Ref.^[38] under a CC BY 4.0 license; (B) Summary of the thermal stability of representative sulfide-based SSE/CAM composites, indicated by the thermally stable temperature (T_ts). Reproduced with permission based on data from Ref.^[32,42,43]; (C) Summary of the thermal stability of representative Li/SSE/Li composites, indicated by the critical temperature of thermal runaway (T_tr; identified as T₂ in ARC tests). Reproduced with permission based on data from Ref.^[45,46]. SSEs: Solid-state electrolytes; LEs: liquid electrolytes; CAM: cathode active material; ARC: accelerating rate calorimeter; CPEs: composite polymer electrolytes; NCM: LiNi_xCo_yMn_1-x-yO₂; LPS: 75Li₂S·25P₂S₅; LCO: LiCoO₂; LSPSCl: Li_9.54Si_1.74P_1.44S_11.7Cl_0.3; LATP: Li_1.4Al_0.4Ti_1.6(PO₄)₃; LAGP: Li_1.5Al_0.5Ge_1.5(PO₄)₃; LLTO: Li_3xLa_2/3-xTiO₃; LLZO: Li_6.4La₃Zr_1.4Ta_0.6O₁₂.