Abstract
Silicon oxycarbide-based amorphous ceramic material was prepared by crosslinking and step-wise pyrolysis of polysiloxane-based Polyramic resin at temperatures up to 1200 °C as a matrix for anode in Na-ion batteries (NIBs). The synthesized powder was milled under low and high energy ball milling (LEM, HEM) conditions to investigate the effect of powder characteristics on the electrochemical properties of anodes in NIBs. The XPS and EDX analyses showed that the chemical compositions of anodes prepared from LEM and HEM SiOC were similar. However, the SiOC anodes prepared from finer grain sized HEM SiOC powders exhibited better performance like lower charge transfer resistance and faster Na+ diffusion coefficient. The slope capacity and thereby the total specific capacity was enhanced in HEM-SiOC anode. Therefore, the refinement of the particle size and increased surface area are vital for producing high-energy density SiOC anodes for NIBs.
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