Expedient secondary functions of flexible piezoelectrics for biomedical energy harvesting

查看全文 作　　者：Yuan [1]Wang;Min [2]Hong;Jeffrey [1]Venezuela;Ting [1]Liu;Matthew [1]Dargusch 机构地区：[1]Centre for Advanced Materials Processing and Manufacturing(AMPAM),The University of Queensland,Brisbane,Queensland,4072,Australia;[2]Centre for Future Materials,University of Southern Queensland,Springfield,Queensland,4300,Australia 出　　处：《Bioactive Materials》索引2023年第4期,共21页 基　　金：The authors acknowledge the support of the Australian Research Council through the ARC Research Hub for Advanced Manufacturing of Medical Devices(IH150100024). 摘　　要：Flexible piezoelectrics realise the conversion between mechanical movements and electrical power by conformally attaching onto curvilinear surfaces,which are promising for energy harvesting of biomedical devices due to their sustainable body movements and/or deformations.Developing secondary functions of flexible piezoelectric energy harvesters is becoming increasingly significant in recent years via aiming at issues that cannot be addressed or mitigated by merely increasing piezoelectric efficiencies.These issues include loose interfacial contact and pucker generation by stretching,power shortage or instability induced by inadequate mechanical energy,and premature function degeneration or failure caused by fatigue fracture after cyclic deformations.Herein,the expedient secondary functions of flexible piezoelectrics to mitigate above issues are reviewed,including stretchability,hybrid energy harvesting,and self-healing.Efforts have been devoted to understanding the state-of-the-art strategies and their mechanisms of achieving secondary functions based on piezoelectric fundamentals.The link between structural characteristic and function performance is unravelled by providing insights into carefully selected progresses.The remaining challenges of developing secondary functions are proposed in the end with corresponding outlooks.The current work hopes to help and inspire future research in this promising field focusing on developing the secondary functions of flexible piezoelectric energy harvesters. 关 键 词：Flexible piezoelectrics STRETCHABLE Hybrid energy harvesting SELF-HEALING