Hollow Iron Oxide Nanoparticles for Application in Lithium Ion Batteries
| Autor: | Michael Slater, Hui Xiong, Mahalingam Balasubramanian, Vitali B. Prakapenka, Tijana Rajh, Paul Podsiadlo, Bonil Koo, Elena V. Shevchenko, Christopher S. Johnson |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Mechanical Engineering Inorganic chemistry Iron oxide chemistry.chemical_element Nanoparticle Bioengineering General Chemistry Condensed Matter Physics Electrochemistry Lithium-ion battery Anode chemistry.chemical_compound chemistry General Materials Science Lithium Iron oxide nanoparticles Faraday efficiency |
| Zdroj: | Nano Letters. 12:2429-2435 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/nl3004286 |
| Popis: | Material design in terms of their morphologies other than solid nanoparticles can lead to more advanced properties. At the example of iron oxide, we explored the electrochemical properties of hollow nanoparticles with an application as a cathode and anode. Such nanoparticles contain very high concentration of cation vacancies that can be efficiently utilized for reversible Li ion intercalation without structural change. Cycling in high voltage range results in high capacity (∼132 mAh/g at 2.5 V), 99.7% Coulombic efficiency, superior rate performance (133 mAh/g at 3000 mA/g) and excellent stability (no fading at fast rate during more than 500 cycles). Cation vacancies in hollow iron oxide nanoparticles are also found to be responsible for the enhanced capacity in the conversion reactions. We monitored in situ structural transformation of hollow iron oxide nanoparticles by synchrotron X-ray absorption and diffraction techniques that provided us clear understanding of the lithium intercalation processes during electrochemical cycling. |
| Databáze: | OpenAIRE |
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