2026-04-20T10:14:50Zhttps://riubu.ubu.es/oai/request

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

Ultrafast Metal‐Free Microsupercapacitor Arrays Directly Store Instantaneous High‐Voltage Electricity from Mechanical Energy Harvesters Chen, Shiqian Li, Zheng Huang, Po‐Han Ruiz Fernández, Virginia Su, Yingchun Fu, Yujie Alesanco, Yolanda Malm, B. Gunnar Niklaus, Frank Li, Jiantong Droplet-based electrcity generators Full printing Microsupercapacitor arrays On-paper electronics PEDOT:PSS Química analítica Electroquímica Chemistry, Analytic Electrochemistry 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. The authors acknowledge the financial support from the Swedish ResearchCouncil (Grant No. 2019–04731), the European Commission (Grant No.101070255, REFORM), and the Swedish Foundation for International Co-operation in Research and Higher Education (STINT, CH2017-7284). 2025-03-10T11:53:12Z 2025-03-10T11:53:12Z 2024-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2198-3844 http://hdl.handle.net/10259/10299 10.1002/advs.202400697 2198-3844 eng Advanced Science. 2024, V. 11, n. 22, p. 2400697 https://doi.org/10.1002/advs.202400697 Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess application/pdf Wiley