One-Pot Synthesis of Tin-Embedded Carbon/Silica Nanocomposites for Anode Materials in Lithium-Ion Batteries
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- One-Pot Synthesis of Tin-Embedded Carbon/Silica Nanocomposites for Anode Materials in Lithium-Ion Batteries
- Hwang, Jongkook; Woo, Seung Hee; Shim, Jongmin; Jo, Changshin; Lee, Kyu Tae; Lee, Jinwoo
- Amphiphilic diblock copolymers; Anode material; Carbon precursors; Carbon silicas; Coulombic efficiency; Cyclability; Functional hybrid materials; Functional nanocomposites; High specific capacity; Lithium-ion battery; Mesostructured; Nano-structured; One pot; One-pot synthesis; Selective interaction; Sn nanoparticles; Tetraethyl orthosilicates; Unique morphologies
- Issue Date
- AMER CHEMICAL SOC
- ACS NANO, v.7, no.2, pp.1036 - 1044
- We report a facile "one-pot" method for the synthesis of Sn-embedded carbon-silica (CS) mesostructured (nanostructured) composites through the selective interaction of resol (carbon precursor), tetraethylorthosilicate (TEOS), and tributylphenyltin (Sn precursor) with an amphiphilic diblock copolymer, poly(ethylene oxide-b-styrene), PEO-b-PS. A unique morphology transition from Sn nanowires to spherical Sn nanoparticles embedded in CS framework has been obtained. Metallic Sn species are homogeneously embedded in a rigid CS framework and are effectively confined within the nanostructures. The resulting composites are used as anode materials for lithium-ion batteries and exhibit high specific capacities (600 mA h g(-1) at a current density of 45 mA g(-1), and 440 mA h g(-1) at a current density of 300 mA g(-1)) and an excellent cyclability of over 100 cycles with high Coulombic efficiency. Most of all, the novel method developed in this work for synthesizing functional hybrid materials can be extended to the preparation of various functional nanocomposites owing to its versatility and facileness.
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