Large Energy Density, Excellent Thermal Stability, and High Cycling Endurance of Lead-Free BaZr0.2Ti0.8O3 Film Capacitors

• DOI: 10.1021/acsami.7b03263
• Publication Date: 2017-05-04T16:12:13Z
• Authors: Zixiong Sun; Chunrui Ma; Xi Wang; Ming Liu; Lu Lu; Ming Wu; Xiaojie Lou; Hong Wang; Chun-Lin Jia
• Keywords: Film capacitor; Thermal Stability

A large energy storage density (ESD) of 30.4 J/cm3 and high efficiency 81.7% under an electrical field 3 MV/cm was achieved at room temperature by the fabrication environmentally friendly lead-free BaZr0.2Ti0.8O3 epitaxial thin films on Nb-doped SrTiO3 (001) substrates using a radio-frequency magnetron sputtering system. Moreover, BZT film capacitors exhibit great thermal stability ESD from 16.8 to 14.0 with beyond 67.4% fatigue endurance (up 106 cycles) in wide range 125 °C. Compared other BaTiO3-based capacitor materials even Pb-based systems, show either or efficiency. All these excellent results revealed that have huge potential application modern electronics, such as locomotive pulse power, harsh working environments.