A highly dense structure boosts energy harvesting and cycling reliabilities of a high-performance lead-free energy harvester. Issue 31 (25th July 2017)

• Record Type: Journal Article
• Authors: Zheng, Mupeng; Hou, Yudong; Yan, Xiaodong; Zhang, Lina; Zhu, Mankang
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 31(2017)
• Page Start: 7862
• Page End: 7870
• Publication Date: 2017-07-25
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7tc00914c
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : The highly dense Mn-KNN ceramics present an excellent energy harvesting performance. Abstract : Currently, effective piezoelectric energy harvesters are based on Pb(Zr, Ti)O3 (PZT) ceramics. However, the growing environmental concerns have been pushing the development of viable green alternatives for lead-based piezoelectric ceramics. In this study, a high quality Mn-modified (K0.5 Na0.5 )NbO3 (Mn-KNN) lead-free piezoelectric ceramic has been prepared, which is promising for use in lead-free piezoelectric energy harvesters. Herein, we showed that the 1.0 mol% Mn-KNN ceramics not only possessed high Curie temperature, but also exhibited excellent energy harvesting performance due to the highly dense fine-grained structure and various domain configurations. In the mode of a cantilever-type energy harvester, a high output power of 85 μW and peak-to-peak voltage of 16 V were obtained at the acceleration of 40 m s −2 . Furthermore, the 1.0 mol% Mn-KNN energy harvester exhibits excellent fatigue resistance up to 10 6 cycles. These findings indicate potential applications of the Mn-KNN piezoelectric energy harvester for self-powered sources of wireless sensor network systems.