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Shadow enhanced self-charging power system for wave and solar energy harvesting from the ocean

Author

Listed:
  • Qian Zhang

    (National University of Singapore)

  • Qijie Liang

    (National University of Singapore)

  • Dilip Krishna Nandakumar

    (National University of Singapore)

  • Hao Qu

    (National University of Singapore)

  • Qiongfeng Shi

    (National University of Singapore)

  • Fuad Indra Alzakia

    (National University of Singapore)

  • Darrell Jun Jie Tay

    (National University of Singapore)

  • Lin Yang

    (National University of Singapore)

  • Xueping Zhang

    (National University of Singapore)

  • Lakshmi Suresh

    (National University of Singapore)

  • Chengkuo Lee

    (National University of Singapore)

  • Andrew Thye Shen Wee

    (National University of Singapore)

  • Swee Ching Tan

    (National University of Singapore)

Abstract

Hybrid energy-harvesting systems that capture both wave and solar energy from the oceans using triboelectric nanogenerators and photovoltaic cells are promising renewable energy solutions. However, ubiquitous shadows cast from moving objects in these systems are undesirable as they degrade the performance of the photovoltaic cells. Here we report a shadow-tribo-effect nanogenerator that hybrids tribo-effect and shadow-effect together to overcome this issue. Several fiber-supercapacitors are integrated with the shadow-tribo-effect nanogenerator to form a self-charging power system. To capture and store wave/solar energy from oceans, an energy ball based on the self-charging power system is demonstrated. By harnessing the shadow-effect, i.e. the shadow of the moving object in the energy ball, the charging time shortens to 253.3 s to charge the fiber-supercapacitors to the same voltage (0.3 V) as using pure tribo-effect. This cost-effective method to harvest and store the wave/solar energy from the oceans in this work is expected to inspire next-generation large-scale blue energy harvesting.

Suggested Citation

  • Qian Zhang & Qijie Liang & Dilip Krishna Nandakumar & Hao Qu & Qiongfeng Shi & Fuad Indra Alzakia & Darrell Jun Jie Tay & Lin Yang & Xueping Zhang & Lakshmi Suresh & Chengkuo Lee & Andrew Thye Shen We, 2021. "Shadow enhanced self-charging power system for wave and solar energy harvesting from the ocean," Nature Communications, Nature, vol. 12(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-20919-9
    DOI: 10.1038/s41467-021-20919-9
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    Cited by:

    1. Ze-Qi Lu & Long Zhao & Hai-Ling Fu & Eric Yeatman & Hu Ding & Li-Qun Chen, 2024. "Ocean wave energy harvesting with high energy density and self-powered monitoring system," Nature Communications, Nature, vol. 15(1), pages 1-14, December.
    2. Hu, Zheng & Deng, Zilong & Gao, Wei & Chen, Yongping, 2023. "Experimental study of the absorption refrigeration using ocean thermal energy and its under-lying prospects," Renewable Energy, Elsevier, vol. 213(C), pages 47-62.
    3. Sayed Saad Afzal & Waleed Akbar & Osvy Rodriguez & Mario Doumet & Unsoo Ha & Reza Ghaffarivardavagh & Fadel Adib, 2022. "Battery-free wireless imaging of underwater environments," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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