Park, A. Reum Kim, Jung Sub Kim, Kwang Su Zhang, Kan Park, Juhyun Park, Jong Hyeok Lee, Joong Kee Yoo, Pil J. 2024-01-20T10:31:11Z 2024-01-20T10:31:11Z 2021-09-04 2014-02-12 1944-8244 https://pubs.kist.re.kr/handle/201004/127094 Although Si is a promising high-capacity anode material for Li-ion batteries (LIB), it suffers from capacity fading due to excessively large volumetric changes upon Li insertion. Nanocarbon materials have been used to enhance the cyclic stability of LIB anodes, but they have an inherently low specific capacity. To address these issues, we present a novel ternary nanocomposite of Si, Mn, and reduced graphene oxide (rGO) for LIB anodes, in which the Si Mn alloy offers high capacity characteristics and embedded rGO nanosheets confer structural stability. Si-Mn/rGO ternary nanocomposites were synthesized by mechanical complexation and subsequent thermal reduction of mixtures of Si nanoparticles, MnO2 nanorods, and rGO nanosheets. Resulting ternary nanocomposite anodes displayed a specific capacity of 600 mAh/g with similar to 90% capacity retention after 50 cycles at a current density of 100 mA/g. The enhanced performance is attributed to facilitated Li-ion reactions with the MnSi alloy phase and the formation of a structurally reinforced electroconductive matrix of rGO nanosheets. The ternary nanocomposite design paradigm presented in this study can be exploited for the development of high-capacity and long-life anode materials for versatile LIB applications. English American Chemical Society SILICON GRAPHITE ALLOY PERFORMANCE STORAGE COMPOSITES SPECTROSCOPY ELECTRODES SHEETS Si-Mn/Reduced Graphene Oxide Nanocomposite Anodes with Enhanced Capacity and Stability for Lithium-Ion Batteries Article 10.1021/am404608d 1 ACS Applied Materials & Interfaces, v.6, no.3, pp.1702 - 1708 ACS Applied Materials & Interfaces 6 3 1702 1708 scie scopus 000331493200050 2-s2.0-84894192374 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article SILICON GRAPHITE ALLOY PERFORMANCE STORAGE COMPOSITES SPECTROSCOPY ELECTRODES SHEETS silicon manganese reduced graphene oxide lithium-ion batteries anodes