Acoustic boosting of battery charging

Abstract

The kinetics of the charge transport across the solid-liquid interface between the electrode and the electrolyte is controlled by a diffusion boundary layer, which is responsible for the time needed for charging the battery. Therefore a removal of this boundary layer by acoustic streaming induced by surface acoustic waves propagating on the electrodes was considered to be promising approach for a reduction of the charging time. Previous electropolishing experiments have shown that Scholte waves were particularly effective in that respect. This concept has been transferred to a model electrode system representing the core of a lead acid battery, where significant reductions of the charging time and corresponding increases of the charging currents resulting from surface acoustic wave sonication have been observed.

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