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Interface thickness optimization of lead-free oxide multilayer capacitors for high-performance energy storage

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Abstract

The effects of interface density and total multilayer film thickness on the dielectric properties and breakdown behavior have been revealed in this work by investigating the environment-friendly energy storage multilayer films of Ba0.7Ca0.3TiO3 (BCT) and BaZr0.2Ti0.8O3 (BZT) dielectrics. Numerical simulations based on a finite element method have given the breakdown process vividly, which agreed well with the experimental results. Moreover, not only the ultrahigh energy storage density of 51.8 J cm−3 with a great efficiency of 81.2% at room temperature but also robust thermal stability has been obtained by optimizing the interface density and total thickness. High energy density above 25.1 J cm−3 and excellent efficiency over 63.6% from room temperature to 200 °C provide a solid basis for potential applications of the multilayer systems in harsh environments.

Graphical abstract: Interface thickness optimization of lead-free oxide multilayer capacitors for high-performance energy storage

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Publication details

The article was received on 22 Nov 2017, accepted on 22 Dec 2017 and first published on 22 Dec 2017


Article type: Paper
DOI: 10.1039/C7TA10271B
Citation: J. Mater. Chem. A, 2018, Advance Article
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    Interface thickness optimization of lead-free oxide multilayer capacitors for high-performance energy storage

    Z. Sun, L. Wang, M. Liu, C. Ma, Z. Liang, Q. Fan, L. Lu, X. Lou, H. Wang and C. Jia, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C7TA10271B

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