Hwang, Junesun Kim, Kyungbae Jung, Woo-Sang Choi, Hyunjoo Kim, Jae-Hun 2024-01-19T19:02:48Z 2024-01-19T19:02:48Z 2021-09-04 2019-10-01 0378-7753 https://pubs.kist.re.kr/handle/201004/119480 Amorphous SiO materials are considered to be alternative high-capacity anode materials for Li-ion batteries. However, the conventional preparation method is a high-temperature and energy-consuming vacuum process. In this study, a simple strategy to produce a SiOx material is proposed. Low-cost micron-sized Si and amorphous SiO2 powders are mechanochemically mixed using a high-energy mechanical milling process. As a result, SiOx materials are produced that have the potential to replace the current commercial SiO powders. The X-ray photoelectron spectra exhibit that the chemical bonding state of Si in the synthesized SiOx materials is similar to commercial SiO. The electron microscopic analyses demonstrate that the secondary particle sizes are reduced and Si crystallites with sizes of a few nanometers to a few tens of nanometers are embedded in the silicon oxide matrix. Due to the morphology and microstructure, the initial coulombic efficiency and cycling stability of the SiOx materials are greatly improved compared to the commercial SiO sample. To further enhance the electrochemical properties, carbon incorporations are carried out, which result in an excellent cycle performance being achieved for the Li-ion battery anodes. The ball-milled SiOx material has ample potential as an alternative to conventional SiO materials. English ELSEVIER POROUS SILICON MONOXIDE HIGH-CAPACITY FLUOROETHYLENE CARBONATE ANODE MATERIAL PERFORMANCE COMPOSITE GRAPHENE MECHANISM INTERPHASE BATTERIES Facile and scalable synthesis of SiOx materials for Li-ion negative electrodes Article 10.1016/j.jpowsour.2019.226883 1 JOURNAL OF POWER SOURCES, v.436 JOURNAL OF POWER SOURCES 436 scie scopus 000483408400021 2-s2.0-85068841719 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article POROUS SILICON MONOXIDE HIGH-CAPACITY FLUOROETHYLENE CARBONATE ANODE MATERIAL PERFORMANCE COMPOSITE GRAPHENE MECHANISM INTERPHASE BATTERIES Li secondary battery Li-alloy type High-capacity Anode Silicon monoxide Ball milling