Broadband Energy Harvester Using Non linear Polymer Spring and Electromagnetic/Triboelectric Hybrid Mechanism 1Scientific RepoRts | 7 41396 | DOI 10 1038/srep41396 www nature com/scientificreports Bro[.]
www.nature.com/scientificreports OPEN received: 23 August 2016 accepted: 19 December 2016 Published: 25 January 2017 Broadband Energy Harvester Using Non-linear Polymer Spring and Electromagnetic/Triboelectric Hybrid Mechanism Rahul Kumar Gupta1,2,3, Qiongfeng Shi1,2,3, Lokesh Dhakar1,2,3, Tao Wang1,2,3, Chun Huat Heng1,2 & Chengkuo Lee1,2,3,4 Over the years, several approaches have been devised to widen the operating bandwidth, but most of them can only be triggered at high accelerations In this work, we investigate a broadband energy harvester based on combination of non-linear stiffening effect and multimodal energy harvesting to obtain high bandwidth over wide range of accelerations (0.1 g–2.0 g) In order to achieve broadband behavior, a polymer based spring exhibiting multimodal energy harvesting is used Besides, non-linear stiffening effect is introduced by using mechanical stoppers At low accelerations (