Temperature Effects on the Behavior of Lithium Iron Phosphate Electrodesстатья
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Дата последнего поиска статьи во внешних источниках: 29 мая 2019 г.
Аннотация:The systematic study of the effect of temperature (in the range from ‒45 to +60°C) on the process
of lithium extraction from LiFePO4 and its insertion into FePO4 is carried out. At a current of about C/1.5,
with decreasing temperature, the capacity decreases, the polarization increases, the range of compositions
corresponding to nonequilibrium solid solutions widens, and the slope of the linear section of the galvanostatic
curves corresponding to the two-phase system increases. The decrease in the capacity with decreasing
temperature is not described by the simple Arrhenius equation. It is assumed that the process on the lithium
iron phosphate electrodes has a mixed diffusion-activation nature. The polarization of the anodic and
cathodic processes increases with decreasing temperature in a complicated way, and the polarization of the
anodic process exceeds that of the cathodic process appreciably.