Lim, Hyojun Kim, Hyeongwoo Kim, Sang-Ok Kim, Ki Jae Choi, Wonchang 2024-01-19T15:34:24Z 2024-01-19T15:34:24Z 2021-09-02 2021-01 1385-8947 https://pubs.kist.re.kr/handle/201004/117603 Silicon oxycarbide (SiOC) has been regarded as potential anode for lithium-ion secondary batteries (LIBs) due to high reversible capacities (higher than conventional graphite) and superior electrical conductivity with regard to free-carbon domain (FCD). Thus, controlling and optimizing the FCD in SiOC is essential factor in determining battery performance. In this study, the FCD controlled SiOC is successfully synthesized via a simple pyrolysis using silicone oil and phenyl group-containing additives (divinylbenzene (DVB)) as precursors. The DVB is critical for the incorporation of carbon to facilitate Si-O-C bonding as well as the formation of the FCD in SiOC. The SiOC anode materials show that there is a dependence between the FCD content and electrochemical performance. The FCD controlled SiOC exhibits remarkable electrochemical performance as compared to carbonexcess materials, such as high reversible capacity (550 mAh g(-1) at 200 mA g(-1)), cycle stability (95% capacity retention after 200th cycles at 200 mA g(-1)) and superior rate capability (300 mAh g(-1) at 2000 mA g(-1)). English Elsevier BV Novel approach for controlling free-carbon domain in silicone oil-derived silicon oxycarbide (SiOC) as an anode material in secondary batteries Article 10.1016/j.cej.2020.126581 1 Chemical Engineering Journal, v.404 Chemical Engineering Journal 404 N scie scopus 000613197700003 2-s2.0-85089266264 Engineering, Environmental Engineering, Chemical Engineering Article LITHIUM-ION BATTERIES HIGH-PERFORMANCE ANODE STORAGE CAPACITY NANOPARTICLES PYROLYSIS CATHODE MECHANISM GLASSES MATRIX Silicone oil Divinylbenzene Silicon oxycarbide High-capacity anode Lithium-ion batteries