|About this Abstract
||MS&T23: Materials Science & Technology
||Late News Poster Session
||O-12: A High-Performance Li-Ion Battery Based on Polymer-Derived Silicon-Oxycarbide/Graphene Nanoplatelets Composites
||Dillip Kumar Panda, Gangadhar Jella, Nawraj Sapkota, Michelle Greenough, Apparao M. Rao, Ravindran Sujith, Rajendra K. Bordia
|On-Site Speaker (Planned)
||Dillip Kumar Panda
Silicon-oxycarbide (SiOC) ceramics derived from amorphous polymers are ideal anode materials for lithium-ion batteries because of their high theoretical capacity and good structure stability. Since SiOC has low electrical conductivity, poor transport properties, low initial Coulombic efficiency, and limited rate capability, it is urgent to develop efficient SiOC-based anodes. Anodes made from SiOC-I or SiOC-II were combined with buckypaper containing carbon nanotubes (CNT) for the first time to overcome these limitations of SiOC. When mixed with graphene nanoplatelets, SiOC-II and graphene nanoplatelets showed improved electrochemical performance. A composite anode (25 wt % SiOC-II and 75% GNP) demonstrated a high specific capacity, with an average capacity of 744 mAh/g at 0.1C, which was significantly better than monolithic SiOC-I, SiOC-II, or GNPs. This composite also demonstrated high reversibility and cycling stability, achieving 344 mAh/g after 260 cycles at 0.5C. This electrochemical performance suggests that SiOC/GNP composites can be used as LiB anodes.