Lee, Yongho Lee, Kwan Young Choi, Wonchang 2024-01-20T00:03:07Z 2024-01-20T00:03:07Z 2021-09-03 2017-11-17 1616-301X https://pubs.kist.re.kr/handle/201004/122052 Sodium-ion batteries have recently attracted intensive attention due to their natural abundance and low cost. Antimony is a desirable candidate for an anode material for sodium-ion batteries due to its high theoretical capacity (660 mA h g(-1)). However, the utilization of alloy-based anodes is still limited by their inherent huge volume changes and sluggish kinetics. The Sb-embedded silicon oxycarbide (SiOC) composites are simply synthesized via a one-pot pyrolysis process at 900 degrees C without any additives or surfactants, taking advantage of the superior self-dispersion properties of antimony acetate powders in silicone oil. The structural and morphological characterizations confirm that Sb nanoparticles are homogeneously embedded into the amorphous SiOC matrix. The composite materials exhibit an initial desodiation capacity of around 510 mA h g(-1) and maintained an excellent capacity retention above 97% after 250 cycles. The rate capability test reveals that the composites deliver capacity greater than 453 mA h g(-1), even at the high current density of 20 C rate, owing to the free-carbon domain of SiOC material. The electrochemical and postmortem analyses confirm that the SiOC matrix with a uniform distribution of Sb nanoparticles provides the mechanical strength without degradation in conductive characteristics, suppressing the agglomeration of Sb particles during the electrochemical reaction. English WILEY-V C H VERLAG GMBH HIGH-CAPACITY ANODE LI-ION ELECTROCHEMICAL PROPERTIES MORPHOLOGICAL EVOLUTION CYCLING STABILITY CATHODE MATERIALS SB NANOPARTICLES CARBON NANOTUBES COMPOSITE ANODES ENERGY-STORAGE One-Pot Synthesis of Antimony-Embedded Silicon Oxycarbide Materials for High-Performance Sodium-Ion Batteries Article 10.1002/adfm.201702607 1 ADVANCED FUNCTIONAL MATERIALS, v.27, no.43 ADVANCED FUNCTIONAL MATERIALS 27 43 scie scopus 000416693600009 2-s2.0-85029743158 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article HIGH-CAPACITY ANODE LI-ION ELECTROCHEMICAL PROPERTIES MORPHOLOGICAL EVOLUTION CYCLING STABILITY CATHODE MATERIALS SB NANOPARTICLES CARBON NANOTUBES COMPOSITE ANODES ENERGY-STORAGE anodes antimony silicone oils silicon oxycarbide sodium-ion batteries