Realizing high low-electric-field energy storage performance in AgNbO3 ceramics by introducing relaxor behaviour

Kai Han; Nengneng Luo; Shuaifei Mao; Fangping Zhuo; Xiyong Chen; Laijun Liu; Changzheng Hu; Huanfu Zhou; Xinpeng Wang; Yuezhou Wei

Journal of Materiomics (Dec 2019)

Realizing high low-electric-field energy storage performance in AgNbO3 ceramics by introducing relaxor behaviour

Kai Han,
Nengneng Luo,
Shuaifei Mao,
Fangping Zhuo,
Xiyong Chen,
Laijun Liu,
Changzheng Hu,
Huanfu Zhou,
Xinpeng Wang,
Yuezhou Wei

Affiliations

Kai Han: Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
Nengneng Luo: Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China; Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China; Corresponding author. Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China.
Shuaifei Mao: Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
Fangping Zhuo: Department of Chemistry, Tsinghua University, Beijing, 100084, China
Xiyong Chen: Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
Laijun Liu: College of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, China
Changzheng Hu: College of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, China
Huanfu Zhou: College of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, China
Xinpeng Wang: Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China
Yuezhou Wei: Guangxi Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, China

Journal volume & issue: Vol. 5, no. 4
pp. 597 – 605

Abstract

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Both sustainable development in environment and safety of high-power systems require to develop a novel lead-free dielectric capacitor with high energy density (Wrec) at low applied electric field. In this work, a remarkably high Wrec of 2.9 J/cm3 accompanying with energy storage efficiency of 56% was achieved in Ag0.9Sr0.05NbO3 ceramic at a low applied electric field of 190 kV/cm, by improving anti-ferroelectricity and introducing relaxor behaviour. The improved anti-ferroelectric stability was attributed to the decreased tolerance factor and average electronegativity difference, while the relaxor behaviour was associated with the increased disordered local structure by Sr-doping. Moreover, the Ag0.9Sr0.05NbO3 ceramics also exhibited outstanding temperature stability in energy density with small variation less than 5% over 20–140 °C. The results indicate that the Ag0.9Sr0.05NbO3 ceramic is a promising candidate for low-electric-field driving capacitors. Keywords: Low applied electric field, Energy storage, Relaxor behaviour, Silver niobate, Anti-ferroelectric

Published in Journal of Materiomics

ISSN: 2352-8478 (Print); 2352-8486 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.sciencedirect.com/journal/journal-of-materiomics

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