Park, A. Reum Nam, Myeong Gyun Kim, A-Young Kim, Kwang Su Shah, Md. Selim Arif Sher Lee, Jun Young Kim, Woo-Jae Lee, Joong Kee Yoo, Pil J. 2024-01-20T00:03:15Z 2024-01-20T00:03:15Z 2021-09-03 2017-11-15 0925-8388 https://pubs.kist.re.kr/handle/201004/122058 Silicon (Si) is a promising anode material for high-performance Li-ion batteries (LIBs), but it undergoes rapid capacity fading through severe volumetric expansion during Li insertion/extraction. Although alloying Si with various metal sources has been pursued to mitigate the structural deterioration, the resulting materials have shown the intrinsic problem of low electrical conductivity. To address this conflicting issue, here we describe a novel ternary nanocomposite of Si/Co-CoSi2/reduced graphene oxide (rGO) made using a facile process of mechanical mixing of Si nanoparticles, Co3O4 microparticles, and rGO nanosheets, followed by carbothermal reduction. Specifically, rGO, which has high electrical conductivity and structural integrity, could work as both a conductive matrix and a reducing agent in forming the Co-CoSi2 phase inside the Si domains during thermal treatment. The proposed ternary nanocomposites exhibited a noteworthy specific capacity of 952 mA h g(-1) with 79.3% capacity retention after 80 cycles at a current density of 100 mA g(-1). We attribute the improved electrochemical performance to the increased structural stability offered by the Co-CoSi2 phase and the interconnected conductive framework of the rGO nanosheets. Therefore, we expect our design process for Si/Co-CoSi2/ rGO ternary nanocomposites to be applicable to other materials that can eventually be used as highperformance anodes for the next generation LIBs. (C) 2017 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA LITHIUM STORAGE MATERIALS SI THIN-FILM ELECTROCHEMICAL PROPERTIES COMPOSITE ANODES SILICON PERFORMANCE NANOSTRUCTURES NANOSPHERES FABRICATION ENERGY Si/Co-CoSi2/reduced graphene oxide ternary nanocomposite anodes for Li-Ion batteries with enhanced capacity and cycling stability Article 10.1016/j.jallcom.2017.07.119 1 JOURNAL OF ALLOYS AND COMPOUNDS, v.724, pp.1134 - 1142 JOURNAL OF ALLOYS AND COMPOUNDS 724 1134 1142 scie scopus 000407848400135 2-s2.0-85024381716 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Chemistry Materials Science Metallurgy & Metallurgical Engineering Article LITHIUM STORAGE MATERIALS SI THIN-FILM ELECTROCHEMICAL PROPERTIES COMPOSITE ANODES SILICON PERFORMANCE NANOSTRUCTURES NANOSPHERES FABRICATION ENERGY Silicon Cobalt silicide Reduced graphene oxide Lithium-ion batteries Anodes Ternary nanocomposites