2026-04-20T13:04:29Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/102992025-03-11T01:05:30Zcom_10259_5822com_10259_5086com_10259_2604col_10259_5823

00925njm 22002777a 4500 dc Chen, Shiqian author Li, Zheng author Huang, Po‐Han author Ruiz Fernández, Virginia author Su, Yingchun author Fu, Yujie author Alesanco, Yolanda author Malm, B. Gunnar author Niklaus, Frank author Li, Jiantong author 2024-03 Harvesting renewable mechanical energy is envisioned as a promising and sustainable way for power generation. Many recent mechanical energy harvesters are able to produce instantaneous (pulsed) electricity with a high peak voltage of over 100 V. However, directly storing such irregular high-voltage pulse electricity remains a great challenge. The use of extra power management components can boost storage efficiency but increase system complexity. Here utilizing the conducting polymer PEDOT:PSS, high-rate metal-free micro-supercapacitor (MSC) arrays are successfully fabricated for direct high-efficiency storage of high-voltage pulse electricity. Within an area of 2.4 × 3.4 cm2 on various paper substrates, large-scale MSC arrays (comprising up to 100 cells) can be printed to deliver a working voltage window of 160 V at an ultrahigh scan rate up to 30 V s−1. The ultrahigh rate capability enables the MSC arrays to quickly capture and efficiently store the high-voltage (≈150 V) pulse electricity produced by a droplet-based electricity generator at a high efficiency of 62%, significantly higher than that (<2%) of the batteries or capacitors demonstrated in the literature. Moreover, the compact and metal-free features make these MSC arrays excellent candidates for sustainable high-performance energy storage in self-charging power systems. 2198-3844 http://hdl.handle.net/10259/10299 10.1002/advs.202400697 2198-3844 Droplet-based electrcity generators Full printing Microsupercapacitor arrays On-paper electronics PEDOT:PSS Ultrafast Metal‐Free Microsupercapacitor Arrays Directly Store Instantaneous High‐Voltage Electricity from Mechanical Energy Harvesters