Modelling of electrochemically stimulated ionic transport in lithium intercalation compounds
| Autor: | Alexei V. Churikov, I. A. Ivanishcheva, A. V. Ivanishchev |
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| Rok vydání: | 2017 |
| Předmět: |
Chemistry
Diffusion Inorganic chemistry Intercalation (chemistry) chemistry.chemical_element 02 engineering and technology General Chemistry Chronoamperometry 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Dielectric spectroscopy Electrode Lithium Cyclic voltammetry 0210 nano-technology |
| Zdroj: | Monatshefte für Chemie - Chemical Monthly. 148:481-487 |
| ISSN: | 1434-4475 0026-9247 |
| DOI: | 10.1007/s00706-016-1892-6 |
| Popis: | To establish the mechanism and to determine lithium transport parameters in the intercalation electrodes based on solid lithium-accumulating compounds, the kinetic models were used, allowing performing a joint analysis of data obtained via the application of the following methods: electrochemical impedance spectroscopy, cyclic voltammetry, pulse chronoamperometry, and chronopotentiometry. The models describe sequential steps of lithium transport into the surface layer and the bulk of the electrode material particles, including the accumulation of lithium in the bulk. Stages of lithium transport in the surface layer and bulk of intercalation material particles are of diffusion nature and differ from each other by characteristic time and diffusion coefficient D. Taking into account of this peculiarity, as well as an adequate assessment of the geometrical configuration of the intercalation system, allows to determine correctly the diffusion parameters of lithium transport. |
| Databáze: | OpenAIRE |
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