Phase transitions in high power electrodes for Li-ion batteries

There is a great need for rechargeable batteries which can deliver high power in an efficient manner. When drawing high power (i.e. discharging with a high current) from a Li-ion battery, some of the stored capacity will not be available for use due to kinetic limitations. However, by modifying the chemical composition and atomic scale structure of the electrode materials, we can alter the phase transition the material goes through during charge and discharge, which may affect the kinetic barrier. Thereby, we can improve the power performance of the battery.

This project aims to widen our understanding of the correlation between chemical composition, atomic structure and the nature of the charge-discharge mechanism, and most important how the latter affects the power performance of the material. This will lead to new design criteria for future high power electrodes for Li-ion batteries.

The project is funded by a Sapere Aude Researcher Leader Grant from the Danish Council of Independent Research – Research for Technology and Production.

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