Supporting Information

Monodisperse and Homogeneous SiOx/C Microspheres: A Promising

High-Capacity and Durable Anode Material for Lithium-Ion

Batteries

Figure S1. XRD patterns of SiOx/C-1 (a), SiOx/C-2 (b) and SiOx/C-3 (c).

Figure S2. EDS elemental mapping images of C, O, and Si in SiOx/C-1.

Figure S3. EDS elemental mapping images of C, O, and Si in SiOx/C-3.

Figure S4. TEM images of the carbon spheres prepared by etching SiOx/C-1 with HF.

Figure S5. TEM images of the carbon spheres prepared by etching organosilica/polymer-2 with HF and then carbonization.

Figure S6. TEM images of the carbon spheres prepared by etching

organosilica/polymer-3 with HF and then carbonization.

Figure S7. N2 adsorption/desorption isotherms (a) and pore size distribution (b) of carbon spheres prepared by etching SiOx/C-2 with HF.

Figure S8. N2 adsorption/desorption isotherms of SiOx/C-1, SiOx/C-2 and SiOx/C-3.

Figure S9. High-resolution Si 2p spectra of SiOx/C-1 (a) and SiOx/C-3 (b).

Table S1. XPS results of SiOx/C-1, SiOx/C-2 and SiOx/C-3

Sample Si4+ content Si3+ content Si2+contentSi average

valenceO content (x)

SiOx/C-1 26.22 % 62.38 % 11.40 % 3.15 1.58

SiOx/C-2 35.05 % 56.83 % 8.12 % 3.27 1.64

SiOx/C-3 25.62 % 64.29 % 10.09 % 3.16 1.58

Figure S10. CV curves of SiOx/C-2.

Figure S11. EIS of SiOx/C-1, SiOx/C-2 and SiOx/C-3 before cycling.

Figure S12. Rate performance (a) and charge/discharge profiles (b) of LiFePO4 at various C rates (from 0.2 to 1C).