Large recoverable energy density with excellent thermal stability in Mn‐modified NaNbO3‐CaZrO3 lead‐free thin films

• DOI: 10.1111/jace.15528
• Publication Date: 2018-03-05T17:56:37Z
• Authors: Bingcheng Luo; Huijuan Dong; Danyang Wang; Kexin Jin
• Keywords: anzsrc-for: 4016 Materials Engineering; anzsrc-for: 0912 Materials Engineering; 600; 02 engineering and technology; 540; 7. Clean energy; 4016 Materials Engineering; anzsrc-for: 40 Engineering; anzsrc-for: 0913 Mechanical Engineering; 7 Affordable and Clean Energy; 0210 nano-technology; 40 Engineering

AbstractEffect of Mn dopant on energy storage properties in lead‐free NaNbO3−0.04CaZrO3 (NNCZ) thin films was investigated. The leakage current was largely suppressed, whereas dielectric constant, breakdown fields, and the difference between maximum polarization and remnant polarization were improved significantly by Mn doping, resulting in a large enhancement of energy storage performance. A large recoverable energy storage density of ~19.64 J/cm3 and an excellent thermal stability (from 30 to 160°C) were simultaneously achieved in the NNCZ thin film with 1 mol% Mn addition. Our results ascertain the great potential of NNCZ lead‐free thin films for the applications in energy storage devices over a wide temperature range.