Abstract:Evaporation induced electric potential in functional materials has been promoting the emergence of a new discipline, hydrovoltaics1,2, but the phenomena have been widely ascribed to streaming potential related classic electrokinetic effects3,4. Here we show that evaporation in ambient environment can directly generate a sustainable voltage of up to 1 V with a current density of around 20 nA cm-2 from a porous carbon black film without contribution from streaming potential. Multi-electrode measurements confirm … Show more
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