Particle Size Dependence of TiO2 Electrodes in Rechargeable Lithium Battery
| Autor: | S. Y. Huang, G. Campet, N. Treuil, J. Porter, K. Chhor |
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| Jazyk: | angličtina |
| Rok vydání: | 1996 |
| Předmět: | |
| Zdroj: | Active and Passive Electronic Components, Vol 19, Iss 3, Pp 189-198 (1996) |
| Druh dokumentu: | article |
| ISSN: | 0882-7516 1563-5031 |
| DOI: | 10.1155/1996/38096 |
| Popis: | Particle size effects in five anatase TiO2 pellet electrodes with different particle sizes (4 ∼ 300nm) and surface areas (8 ∼ 380m2/g) were studied by XRD analysis, chronopotentiometry and chronoamperometry in Li/LiN(CF3SO2)2 + EC:DME/TiO2 cells. Nanosized TiO2 electrodes showed by 22% larger storage capacity, 50% lower overvoltage loss at the same current density, and 75% higher charge density for a given time than microsized ones; electric storage capacity enhances more rapidly with decreasing particle size and increasing surface area in a nanoscale region than in a microscale region. The particle size dependence may be explained by surface morphology of electrodes and existence of structural defects or distortion in the surface layer of TiO2 nanosized particles. |
| Databáze: | Directory of Open Access Journals |
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