Relaxor Ferroelectric AgNbO[sub.3] Film Fabricated on SrTiO[sub.3] Substrates via Pulsed Laser Deposition

• Published in: Coatings (Basel) Vol. 13; no. 11
• Main Authors: Ma, Qingzhu, Yao, Yao, Su, Dandan, Zhang, Suwei, Zhao, Lei
• Format: Journal Article
• Language: English
• Published: MDPI AG 01.10.2023
• Subjects: Capacitors; Dielectrics; Electric vehicles; Energy efficiency; China
• ISSN: 2079-6412; 2079-6412
• DOI: 10.3390/coatings13111834

AgNbO[sub.3]-based materials have attracted extensive attention in energy storage due to their double hysteresis loops, but they suffer from low breakdown strength (E[sub.b]). AgNbO[sub.3] films with few defects and small thickness exhibit high E[sub.b], which helps to improve the energy storage performance. In this work, we successfully prepared AgNbO[sub.3] thin films on (110) SrTiO[sub.3] substrate using pulsed laser deposition technology. The AgNbO[sub.3] film shows good crystalline and relaxor ferroelectric behavior. A high E[sub.b] up to 1200 kV/cm is obtained in AgNbO[sub.3] film, which contributes to good recoverable energy storage density W[sub.rec] up to 10.9 J/cm[sup.3] and energy efficiency η of 75.3%. Furthermore, the W[sub.rec] remains above 2.9 J/cm[sup.3] and the η varies between 72.5% and 82.5% in a wide temperature range of 30–150 °C. This work reveals the great potential of relaxor ferroelectric AgNbO[sub.3] film for energy storage.