fig2

Figure 2. (A) Schematic illustration of the formation procedure of MnNi-PBA spheres. (B) Cycling performance of MnNi-PBA spheres and MnNi-PBA particles at 50 mA·g^-1 (reprinted with permission^[53]). (C) Schematic illustration of the procedure for the synthesis of the Bi@Bi₄Se₃@C sample (reprinted with permission^[55]). (D) Scheme illustrating the synthetic procedure of C@DSBC. (E) SEM image and (F) rate performance of C@DSBC (reprinted with permission^[56]). (G) Schematic illustration of template-COF HSs. (H) TEM image and (I) prolonged cycling stability of TP-COF HSs (reprinted with permission^[58]).