Bo-chen HuangLi-yan TsuiSettu RamkiHsiao-ping HsuCHUNG-WEN LAN2024-07-192024-07-192024-07-1524058440https://www.scopus.com/record/display.uri?eid=2-s2.0-85196840207&origin=resultslisthttps://scholars.lib.ntu.edu.tw/handle/123456789/719902Silicon oxycarbide (SiOC) exhibits good retention and a reasonable specific capacity and is an alternative to silicon used as an anode material for high-performance lithium-ion batteries. However, SiOC generally shows a low Initial Coulombic Efficiency (ICE), wasting the lithium from the cathode. This work explores different sol-gel routes to synthesize SiOC from silanes and compares their performance. We found that the crushed bulk acid-catalyzed SiOC is simple and cost-effective but with excellent performance. Adding dimethyldimethoxysilane (DMDMS) by decreasing the oxygen content further enhances the battery performance. Building upon the excellent performance of SiOC, we further embed nano-silicon into SiOC. The Si/SiOC composites achieved a significantly higher specific capacity of 2185 mAhg−1 and an impressive ICE of 77 % with acceptable battery retention.trueAnode materialBulk SiOCLithium-ion batterySi/SiOC compositeSilaneSpherical SiOC[SDGs]SDG7[SDGs]SDG11journal article10.1016/j.heliyon.2024.e336122-s2.0-85196840207