Significantly Enhanced Transduction Coefficient of PLZT Ceramics to Obtain a Very High Power Density as a Piezoelectric Energy Harvester

• Published in: ACS applied materials & interfaces 2025-01, Vol.17 (2), p.3560-3569
• Main Authors: Lang, Junhui, Yuan, Mingwang, Meng, Yingzhi, Tang, Silin, Zhang, Biao, Ke, Qingqing, Liu, Laijun
• Format: Article
• Language: English
• Subjects: Functional Inorganic Materials and Devices
• ISSN: 1944-8244; 1944-8252; 1944-8252
• DOI: 10.1021/acsami.4c15196

Piezoelectric energy harvesters (PEHs) have attracted much attention due to their efficient harvesting of vibrational energy from the ambient environment, which demonstrates great potential applications. Unfortunately, their low energy density severely hinders the further development of PEHs. Therefore, it is highly desirable to search for piezoelectric materials with a high transduction coefficient (d 33 × g 33). In this work, an excellent d 33 × g 33 is achieved in Pb0.94(La0.06‑x Nd x ) (Zr0.58Ti0.42)0.985O3 (x = 0, 0.01, 0.02, 0.03, and 0.04) (PL0.06‑x N x ZT) ceramics by composition modulation. The best d 33 × g 33 of 26.71 pm2/N is obtained with an optimal composition of x = 0.02. Moreover, a superior output voltage of 28.4V p and power density of 15.93 μW/mm3 are simultaneously obtained for the sample applied in the PEH system. The sizes of the polar nanodomains of the samples are estimated using a phenomenological statistical model, and the domain configuration is observed using PFM. Our results indicate that composition modulation in PLZT can regulate and awaken ferroelectric domains, giving rise to an ultrahigh d 33 × g 33, which consequently results in enhanced performance of the output voltage and power density of PEHs.