Improving the performance of Li-ion battery carbon anodes by in-situ immobilization of SiOx nanoparticles
| Autor: | Hideharu Iwasaki, Kazuki Kamikubo, Shuto Taniguchi, Aditya F. Arif, Takafumi Izawa, Takashi Ogi |
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| Rok vydání: | 2019 |
| Předmět: |
Battery (electricity)
Nanocomposite Materials science Mechanical Engineering Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Lithium battery Lithium-ion battery 0104 chemical sciences Tetraethyl orthosilicate chemistry.chemical_compound X-ray photoelectron spectroscopy Chemical engineering chemistry Mechanics of Materials Electrode General Materials Science 0210 nano-technology |
| Zdroj: | Materials Research Bulletin. 112:16-21 |
| ISSN: | 0025-5408 |
| DOI: | 10.1016/j.materresbull.2018.11.044 |
| Popis: | A 30% improvement of the capacity of a lithium ion battery was demonstrated by introducing a C/SiOx nanocomposite electrode having a SiOx nanoparticle loading of 15 wt.%. The nanocomposite was tailored from tetraethyl orthosilicate (TEOS) and 3-aminophenol which simultaneously underwent hydrolysis-condensation and polymerization, respectively, to produce a C/SiO2 intermediate when subjected to microwave irradiation. SiO2 was present as nanoparticles on the carbon surface, which allowed for facile reduction. Under a mild reducing agent, concurrent carbonization of the 3-aminophenol polymer and the reduction of SiO2 nanoparticles were performed. The value of x in the synthesized C/SiOx was 1.24 according to the binding energy from the Si 2p x-ray photoelectron spectroscopy spectrum. The synthesized C/SiOx nanocomposite delivered a reversible capacity of 383 mA h/g as a lithium battery anode—a 30% improvement on the carbon-only electrode. Charge-discharge cycling shows 84% capacity retention after 100 cycles. |
| Databáze: | OpenAIRE |
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