fig9

Figure 9. (A) The PEG/400CDF composite after 100/200 thermal cycles^[186]; (B) Shape stability study of PCMs and biochar PCCs^[187]; (C) 3D porous structure and 2D flaky morphology of biochar microparticles^[188]; (D) The relative enthalpy efficiency of PCCs for 0, 100, 200, 300, 400, and 500 cycles^[189]; (E) Schematic illustration of the fabrication process of PCCs^[190]; (F) SEM image of CP, the calculation results of encapsulation efficiency, relative enthalpy efficiency and encapsulation effectiveness of different ND/CP samples, and leakage retention histograms of shape-stable PCMs^[56]; (G) Temperature curves during ten charge/discharge cycle tests at 2C discharge rate and the schematic of the heat dissipation of battery modules; (H) The schematic of the battery modules and battery thermal management system platform^[48]. PEG: polyethylene glycol; PCM: phase change material; PCC: phase change composite; 3D: three-dimensional; 2D: two-dimensional; ND: n-docosane; CP: cork powder.