Kim, Dowon Kim, Hyeongwoo Lim, Hyojun Kim, Ki Jae Jung, Hun-Gi Byun, Dongjin Kim, Changsam Choi, Wonchang 2024-01-19T16:30:50Z 2024-01-19T16:30:50Z 2021-09-02 2020-11 0363-907X https://pubs.kist.re.kr/handle/201004/117963 Sodium-ion batteries (SIBs) are not only cheaper to produce than lithium-ion batteries, but the reserves of sodium in the world are also more uniform and abundant. Thus, efforts are being made to utilize sodium-ion batteries as next-generation large-capacity energy-storage devices. Sb-based anode materials have emerged as a popular alloying material for SIB owing to their high theoretical capacity. However, Sb exhibits the problem of capacity fading owing to excessive volume expansion (approximately 390%). SiOC is a buffer material that has been investigated in terms of its ability to overcome these disadvantages; however, SiOC has the disadvantage of containing a fixed and limited free-carbon domain. Here, high free-carbon contained in Sb/SiOC composites (HFC-Sb/SiOC) was easily synthesized by the heat treatment of divinylbenzene (DVB), a liquid carbon source, with silicone oil and Sb acetate. Sb nanoparticles were uniformly embedded in DVB-modified SiOC with increased free-carbon domains. This composite material showed cycling stability (344.5 mAh g(-1)after the 150 cycles at 0.2 C) and outstanding rate properties (197.5 mAh g(-1)at 5 C) as the SIB anode. The enhanced electrochemical performance is result from the increased free-carbon domains in the SiOC matrix caused by the addition of DVB, which makes the characteristics of the SiOC material softer and more elastic, suppressing volume changes and enhancing the electrical conductivity. English WILEY GRAPHENE OXIDE COMPOSITE LI-ION ELECTROCHEMICAL PERFORMANCE SB NANOPARTICLES MORPHOLOGICAL EVOLUTION NEGATIVE ELECTRODES CATHODE MATERIALS NANOPOROUS SB/C SILICONE OIL LONG-CYCLE A facile control in free-carbon domain with divinylbenzene for the high-rate-performing Sb/SiOCcomposite anode material in sodium-ion batteries Article 10.1002/er.5769 1 INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.44, no.14, pp.11473 - 11486 INTERNATIONAL JOURNAL OF ENERGY RESEARCH 44 14 11473 11486 scie scopus 000558920700001 2-s2.0-85089369514 Energy & Fuels Nuclear Science & Technology Energy & Fuels Nuclear Science & Technology Article GRAPHENE OXIDE COMPOSITE LI-ION ELECTROCHEMICAL PERFORMANCE SB NANOPARTICLES MORPHOLOGICAL EVOLUTION NEGATIVE ELECTRODES CATHODE MATERIALS NANOPOROUS SB/C SILICONE OIL LONG-CYCLE anode materials antimony divinylbenzene silicon oxycarbide sodium-ion batteries