Abstract
Nano-hydroelectric generators that use abundant water resources to convert them into electricity are urgently needed to develop renewable energy supplies and alleviate the energy crisis. Inspired by the phenomenon that plants in nature rely on the bark to transport water from the roots to the branches and leaves, in this study we mimic the structure of Ginkgo bark by loading CNT-OH and Ti3C2Tx MXene nanosheets onto cotton fabric using a simple in situ polymerization method to construct a nanogenerator with high capillary core wicking rate. A single CMTEPG (3 cm × 10 cm) achieves open-circuit voltage and short-circuit current of 0.36 V and 520 μA, respectively, in a simulated seawater (3.5 wt% NaCl) solution. By connecting different numbers of device units in series in a simulated seawater solution, it is possible to light small red LED bulbs and drive blue LED displays. In addition, the flexible generator shows excellent mechanical stability, and the optimized generator achieves an actual output power of 46.63 μW.
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