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报告人简介：

Dr.Wanlin GUO, Academician of  Chinese Academy of Sciences,Chair Professor in mechanics and nanoscience, founder and director of the Key Laboratory of Intelligent Nano Materials and Devices of Ministry of Education and the Institute of Nanoscience of Nanjing University of Aeronautics and Astronautics. His current research focuses on intelligent nano materials and devices, novel conception and technology for efficient energy conversion, molecular physical mechanics for neuronal signaling and molecular biomimics, as well as strength and safety of aircraft and engine. He has published more than 400 peer-reviewed journal papers on Nature series, Phys. Rev. Lett., J. Am. Chem. Soc., Adv. Mater., J. Mech. Phys. Solids, Nano Lett., etc. He received the National Science Foundation of China for Distinguished Young Scholars in 1996 and the honor of Cheung Kong Scholars in 1999. In 2012, he obtained the National Nature Science Prize of China.

报告摘要：

In contrast to conventional technologiesthat harvest kinetic energy of water,hydrovoltaic technology generateselectricity from the direct interaction ofmaterials with water¹.

Water is not only the essence of life, but also the largest energy carrier on earth. Water covers about 70% of the earth's surface, absorbing 70% of the solar energy arrivingthe earth, and in the atmosphere it can existin liquid, gaseous and solid states. In human history, through a variety of scientific principles, such as running water driven wheel, steam locomotives, water driven generator as well as theelectrokinetic effects,the potential energy or kinetic energy of water can be converted into useful mechanical motion and electrical energy according to the principles of classical mechanics and electromagnetic dynamics².In the recent decade, new mechanisms include waving potential³, drawing potential⁴,evaporation-induced electric potential⁵ have been found. Withthese versatile hydrovoltaic effects, energyfrom flowing, waving, dropping,condensing, and evaporating water cannowbe harvested, significantly extendingour capability in harvesting water energy, leading to the emerging hydrovoltaic technology⁶ andhydrovoltaics: New ways of harvesting electricity from water⁷.

In the past two years, intensive efforts have been devotedto hydrovoltaic technology with notabledevelopments made. The powergeneration has been improved by severalorders with incorporation of new materials and devices, putting the Hydrovoltaic Energy on the Way⁸.

Here, we will review hydrovoltaictechnology for harvesting environmental energy, serving as a potentialNegative carbon emission energy technology, mainly focusing on therecent developments, and envision thefuture directions for hydrovoltaics.

References

1. 郭万林，水伏科学与技术的曙光，中国科学院第十九次院士大会第六届学术年会学术报告汇编，2018, 608-618

2. Yin, J., Zhang, Z., Li, X., Zhou, J. & Guo, W. Harvesting Energy from Water Flow over Graphene? Nano Letters12, 1736-1741 (2012).

3. Yin, J., Zhang, Z., Li, X., Yu, J., Zhou, J., Chen, Y. & Guo, W. Waving potential in graphene. Nature Communication5, 3582 (2014).

4. Yin, J., Li, X., Yu, J., Zhang, Z., Zhou, J. & Guo, W. Generating electricity by moving a droplet of ionic liquid along graphene. Nature Nanotechnology9, 378 (2014).

5. Xue, G., Xu, Y., Ding, T., Li, J., …, Zhou, J. & Guo, W. Water-evaporation-induced electricity with nanostructured carbon materials. Nature Nanotechnology12, 317 (2017).

6. Zhang, Z., Li, X., Yin, J., Xu, Y.,  Fei, W., Xue, M., Wang, Q., Zhou J. & Guo, W. Emerging hydrovoltaic technology. Nature Nanotechnology13, pages1109–1119 (2018.12.6).

7. Editorial: More power from water. Nature Nanotechnology 13, 1087-1087 (2018).

8. Yin J，Zhou J，Fang S，Guo W,Hydrovoltaic Energy on the Way  Joule 2020, DOI：10.1016/j.joule.2020.07.015