title: Rational design of carbon network cross-linked Si-SiC hollow nanosphere as anode of lithium-ion batteries.
abstract: This study aims to realize controllable synthesis of Si-based nanostructures from common and easily accessible silica nanoparticles and to study their component/structure-dependent electrochemical performance as an anode of lithium-ion batteries (LIBs). To this end, a controllable route based on deliberate design has been developed to prepare hollow Si-based nanospheres with tunable composition and crystal structure at the nanoscale. The synthesis process started with coating silica nanoparticles with a carbonaceous polymer with a controllable thickness followed by magnesiothermic reduction. An Si-SiC-C composite was finally produced with a unique hollow sphere structure featuring Si-SiC nanoparticles encapsulated by a cross-linked carbon film network. In addition to the scalability of the synthetic route, the resulting composite exhibits a number of advantageous properties, including excellent electrical conductivity, highly accessible surfaces, structural coherence, and a favorable structure for the formation of a stable solid-electrolyte interphase, which makes it attractive and promising for advanced anode materials of LIBs.
authors.affiliation: Department of Mechanical Engineering, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA. jhchen@uwm.edu.
authors.forename: Zhenhai
authors.initials: Z
authors.lastname: Wen
authors.forename: Ganhua
authors.initials: G
authors.lastname: Lu
authors.forename: Shumao
authors.initials: S
authors.lastname: Cui
authors.forename: Haejune
authors.initials: H
authors.lastname: Kim
authors.forename: Suqin
authors.initials: S
authors.lastname: Ci
authors.forename: Junwei
authors.initials: J
authors.lastname: Jiang
authors.forename: Patrick T
authors.initials: PT
authors.lastname: Hurley
authors.forename: Junhong
authors.initials: J
authors.lastname: Chen
mesh_terms: D002244:Carbon / Q000737:chemistry; D017554:Carbon Compounds, Inorganic / Q000737:chemistry*; D004553:Electric Conductivity; D011211:Electric Power Supplies; D007477:Ions / Q000737:chemistry; D008094:Lithium / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D012825:Silicon / Q000737:chemistry*; D017655:Silicon Compounds / Q000737:chemistry*
chemical_list: D017554:Carbon Compounds, Inorganic; D007477:Ions; D011108:Polymers; D017655:Silicon Compounds; D002244:Carbon; D008094:Lithium; C022088:silicon carbide; D012825:Silicon