摘要
In the era of the Internet of Things(IoT),the provision of sustainable power to distributed,mobile,and low-power-consumption electronic devices is a critical challenge.To overcome this challenge,the triboelectric nanogenerator(TENG),a highly efficient high-entropy mechanical energy harvesting device,was developed in 2012.This device enables the direct conversion of irregular and low-frequency mechanical energy into pulsed alternating current(AC)signals.However,the incompatibility of most electronic devices with AC signals necessitates rectifier circuits or generators that deliver direct current(DC)signals.In recent years,DC-TENGs have undergone extensive development,achieving significant milestones in various application fields while also facing crucial challenges that require solutions.In this review,three categories of DC-TENG devices with distinct operating mechanisms are comprehensively explored:multiphase coupling,mechanical rectification,and air breakdown.Their typical structures and working mechanisms are thoroughly discussed,and specific output performance limitations,along with corresponding optimization strategies,are identified.Furthermore,the applications of DC-TENGs in various scenarios are summarized.Finally,the challenges faced by DC-TENGs and potential solutions are analyzed to guide further advancements in this technology.
基金
supported by the Postdoctoral Science Foundation(Grant No.2023M730419)
the Ministry of Education“Chunhui Plan”Cooperative Scientific Research Project(Grant No.HZKY20220206)
the Scientific and Technology Research Program of Chongqing Municipal Education Commission(Grant Nos.KJQN202100522,KJQN202200514 and KJQN202100514)
the Natural Science Foundation of Chongqing(Grant No.cstc2021jcyj-msxmX0746)
the Dr.“Through Train”Scientific Research Program(Grant No.CSTB2022BSXM-JCX0091)。
作者简介
contributed equally/Corresponding authors:CHEN Jie,email:chenjie@cqnu.edu.cn;contributed equally:GUO RuiLong;Corresponding authors:GUO HengYu,email:physghy@cqu.edu.cn。
