Journal
NANO ENERGY
Volume 48, Issue -, Pages 128-133Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2018.03.032
Keywords
Film-type energy generator; Graphene composite; Ocean wave energy; Energy conversion; Energy harvest
Categories
Funding
- National Natural Science Foundation of China [61774139, 21503202, 61604143]
- Shandong Provincial Natural Science Foundation [JQ201714]
- Director Foundation from Qingdao National Laboratory for Marine Science and Technology [QNLM201702]
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It is a challenge to harvest ocean wave energy by electrokinetic principle. We present here film-type generators made of carbon for wave energy harvest. The electrical signals arise from charge transportation along percolating channels driven by moving electric double-layer boundary at generator/seawater interfaces. Both voltage and current outputs are maximized by optimizing carbon dosage, wave frequency, hoisting angle and seawater temperature, producing a voltage of >20 mV and a current of >10 microamp from a 15 cm(2)-sized generator. We illustrate the electricity can be scaled up through series and parallel connections of multiple generators. Upon persistently rushing by waves, these film-type generators are stable over several hours. This approach to ocean wave energy harvest provides new opportunities for unprecedented low-investment, scalable power outputs and high stability.
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