fig6

Figure 6. (A) TEM imaging studies showing (a) SnO₂ microspheres, (b) SnO₂/SiO₂ microspheres, (c) hollow microspheres of SnO₂@C, and (d) hollow microspheres of Sn₄P₃@C. (e-h) Elemental mapping images of Sn₄P₃@C, (i) HRTEM image of Sn₄P₃ with (j) SAED pattern of Sn₄P₃@C. (B) (a) Discharge/charge profiles of hollow Sn₄P₃@C electrodes at different current densities, (b) Comparison of cyclic performance of hollow Sn₄P₃@C with pure Sn₄P₃ electrodes at a current density of 0.2 A g^-1, and (c) Extended cycling of Sn₄P₃@C hollow microsphere anode at high ampere densities of 2 and 5 A g^-1, respectively. Reproduced with permission from^[103]. Copyright © 2019 American Chemical Society.