Synthesis and characterization of carbon coated sponge-like tin oxide (SnOx) films and their application as electrode materials in lithium-ion batteries
| Autor: | Rudolf Zentel, Bernd Oschmann, Wolfgang Tremel, Muhammad Nawaz Tahir, Nils Mohri, Nina Laszczynski, Jan von Zamory, Stefano Passerini, Franziska Mueller |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Scanning electron microscope Nanoporous chemistry.chemical_element Nanotechnology 02 engineering and technology General Chemistry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Tin oxide 01 natural sciences 0104 chemical sciences Carbon film chemistry X-ray photoelectron spectroscopy Coating Chemical engineering engineering General Materials Science Thin film 0210 nano-technology Tin |
| Zdroj: | Journal of Materials Chemistry A. 4:612-619 |
| ISSN: | 2050-7496 2050-7488 |
| Popis: | Nanoporous metal oxides are widely used for the development of various functional nanostructures. We report on the synthesis of sponge-like tin oxide films on copper foil by anodization of electrochemically deposited tin films. The thin films are functionalized using a surface-anchoring carbon precursor-polymer (poly(acrylonitrile-b-dopamine acrylamide)) followed by annealing at elevated temperature to convert the polymer coating into a carbonaceous coating. The as prepared and the carbon coated films are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and Raman spectroscopy. Subsequently, both SnOx films are employed as anode materials in lithium ion batteries. Carbon coating has a beneficial effect on the battery performance with respect to the rate capability, increasing the capacity by 200 mA h g−1 for all applied current densities. After 20 cycles, coated samples show a reversible specific charge capacity of 497 mA h g−1. Ex situ scanning electron microscopy reveals the retention of the sponge-like morphology even after cycling. |
| Databáze: | OpenAIRE |
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