Fitting of the voltage vs. insertion curves of the LiFePO4 electrode was based on theoretical expressions describing the Li+ diffusive process in a solid medium. The noninteracting gas model for the chemical potential of ions distributed in a solid matrix was taken into account, and the diffusion coefficient and the energy activation for the diffusion process were accordingly calculated. The polari- zation curves at various discharge stages were theoretically obtained, and a good agreement was found with the experimental data at all discharge rates. A mathematical relation describing the trend of the diffusion resistance vs. insertion degree was also developed.
Fitting of the Voltage-Li+ insertion curve of LiFePO4 / Pasquali, Mauro; Dell'Era, Alessandro; P. P., Prosini. - In: JOURNAL OF SOLID STATE ELECTROCHEMISTRY. - ISSN 1432-8488. - STAMPA. - 13:(2009), pp. 1859-1865. [10.1007/s10008-008-0737-6]
Fitting of the Voltage-Li+ insertion curve of LiFePO4
PASQUALI, Mauro;DELL'ERA, Alessandro;
2009
Abstract
Fitting of the voltage vs. insertion curves of the LiFePO4 electrode was based on theoretical expressions describing the Li+ diffusive process in a solid medium. The noninteracting gas model for the chemical potential of ions distributed in a solid matrix was taken into account, and the diffusion coefficient and the energy activation for the diffusion process were accordingly calculated. The polari- zation curves at various discharge stages were theoretically obtained, and a good agreement was found with the experimental data at all discharge rates. A mathematical relation describing the trend of the diffusion resistance vs. insertion degree was also developed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
