Polyoxometalate power generator (IMAGE) Tsinghua University Press Caption The polyoxometalate power generator collects the natural atmospheric humidity and produces continuous electrical signals by the uneven distribution and directional movement of ions, realizing efficient collection and utilization of low-value energy. Credit Nana Research, Tsinghua University Press Usage Restrictions News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.