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Biomechanical energy harvesting appears as an attractive solution to replace the use of batteries in wearables, as the body generates sufficient power to drive small electronics. In particular, triboelectric nanogenerators (TENGs) have emerged as a promising approach due to its lightweight and high power density. In this work, a TENG is hybridized with an electromagnetic generator (EMG) to harvest energy from the foot strike. An enclosed radial\u2010flow turbine is optimized and used to convert the foot\u2010strike low\u2010frequency linear movement into a higher\u2010frequency rotational motion (by a factor of \u224812). Besides increasing the motion frequency, the employed mechanism is physically robust and enables a continuous operation from irregular mechanical excitations. A single TENG unit operating in the freestanding mode generated an optimal power of 4.72\u00a0\u00b5W and transferred a short\u2010circuit charge of 2.3\u00a0nC. The TENG+EMG hybridization allows to power a digital pedometer even after the mechanical input stopped. Finally, the energy harvester is incorporated into a commercial shoe to power the same pedometer from foot walking. The obtained results validate the developed prototype ability to serve as a portable power source that can drive sensors and wearable electronics.<\/jats:p>","DOI":"10.1002\/admt.202300689","type":"journal-article","created":{"date-parts":[[2023,7,24]],"date-time":"2023-07-24T00:21:01Z","timestamp":1690158061000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Airflow\u2010Driven Triboelectric\u2010Electromagnetic Hybridized Nanogenerator for Biomechanical Energy Harvesting"],"prefix":"10.1002","volume":"8","author":[{"given":"Tiago","family":"Alves","sequence":"first","affiliation":[{"name":"IFIMUP and Faculty of Sciences of the University of Porto  Rua do Campo Alegre Porto 4169\u2010007 Portugal"}]},{"given":"C\u00e1tia","family":"Rodrigues","sequence":"additional","affiliation":[{"name":"IFIMUP and Faculty of Sciences of the University of Porto  Rua do Campo Alegre Porto 4169\u2010007 Portugal"}]},{"given":"Carlos","family":"Callaty","sequence":"additional","affiliation":[{"name":"IFIMUP and Faculty of Sciences of the University of Porto  Rua do Campo Alegre Porto 4169\u2010007 Portugal"}]},{"given":"Candido","family":"Duarte","sequence":"additional","affiliation":[{"name":"INESC\u2010TEC and Faculty of Engineering of the University of Porto  Rua Dr. Roberto Frias Porto 4200\u2010465 Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0494-3009","authenticated-orcid":false,"given":"Jo\u00e3o","family":"Ventura","sequence":"additional","affiliation":[{"name":"IFIMUP and Faculty of Sciences of the University of Porto  Rua do Campo Alegre Porto 4169\u2010007 Portugal"}]}],"member":"311","published-online":{"date-parts":[[2023,7,23]]},"reference":[{"key":"e_1_2_8_1_1","doi-asserted-by":"publisher","DOI":"10.1002\/adma.202004178"},{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.matt.2021.01.006"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.trechm.2021.01.001"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.comnet.2018.12.008"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10796-014-9492-7"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.aau8825"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.23919\/ICN.2020.0008"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1212741"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1038\/35104644"},{"key":"e_1_2_8_10_1","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.202006679"},{"key":"e_1_2_8_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.nanoen.2020.105303"},{"key":"e_1_2_8_12_1","doi-asserted-by":"publisher","DOI":"10.34133\/2020\/7158953"},{"key":"e_1_2_8_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.nanoen.2019.05.063"},{"key":"e_1_2_8_14_1","doi-asserted-by":"publisher","DOI":"10.3390\/en10101483"},{"key":"e_1_2_8_15_1","doi-asserted-by":"publisher","DOI":"10.1038\/ncomms12744"},{"key":"e_1_2_8_16_1","doi-asserted-by":"publisher","DOI":"10.1186\/1743-0003-8-22"},{"key":"e_1_2_8_17_1","unstructured":"P.Niu P.Chapman R.Riemer X.Zhang inIEEE 35th Annu. 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