Abstract
Self-powered monoelectrodes that can convert clean energy from nature into electricity is a promising solution to meet the energy demands in modern electronic devices. We report here a category of self-powered flexible monoelectrodes made from cost-effective graphene/reduced graphene oxide (G/rGO) composite films to harvest rain energy. Periodic current and voltage signals are recorded under persistent rain stimuli to evaluate the rain-to-electricity efficiency. The mechanism behind rain energy harvest is charging/discharging cycles of electron|cation electrical double-layer (EDL) pseudocapacitances at G/rGO-raindrop interfaces. An average current of hundreds of nanoamps and voltage of hundreds of microvolts are achieved by optimizing monoelectrodes.
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