journal article·2019-08-26

BaTiO3-Based Multilayers with Outstanding Energy Storage Performance for High Temperature Capacitor Applications

Wen-Bo Li, Di Zhou, Ran Xu, Da-Wei Wang, Jin-Zhan Su, Li-Xia Pang, Wen-Feng Liu, Guo-Hua Chen

ACS Applied Energy Materials· Volume 2· Issue 8
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Abstract

With the ultrahigh power density and fast charge–discharge capability, a dielectric capacitor is an important way to meet the fast increase in the demand for an energy storage system such as pulsed power systems (PPS). The BaTiO3-based capacitor is considered as one of the candidates for PPS due to its high permittivity. However, with the continuous miniaturization of PPS, the demand further increases in energy density and thermal stability of BaTiO3-based capacitors. Thus, this work describes a new high performance multilayer ceramic capacitor (MLCC) of BaTiO3–xBi(Li0.5Nb0.5)O3 (BT–xBLN) (0.0 ≤ x ≤ 1.0) for PPS. On the basis of the XRD and dielectric constant of BT–xBLN (0.0 ≤ x ≤ 1.0) ceramics, all compositions exhibited an average perovskite structure (tetragonal phase, 0.0 ≤ x < 0.05; pseudocubic phase, 0.05 ≤ x < 0.4) and multiple phase (0.4 ≤ x < 1.0). For example, the 0.90BaTiO3–0.10Bi(Li0.5Nb0.5)O3 multilayer ceramics capacitors were characterized by charge efficiency (η ≥ 91.5%), discharge energy density (Ue ∼ 4.5 J cm–3), breakdown strength (Eb > 450 kV cm–1), and good thermal stability, demonstrating their potential in PPS. This work makes breakthroughs in BaTiO3-based capacitor materials with high Ue and adds a new member to the BaTiO3-based dielectric capacitor material family for the energy storage field.
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Research context

OpenAlex topics: Ferroelectric and Piezoelectric Materials · Dielectric materials and actuators · Microwave Dielectric Ceramics Synthesis

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China

State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China

Department of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, United Kingdom

International Research Centre for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China

Micro-Optoelectronic Systems Laboratories, Xi’an Technological University, Xi’an 710032, Shaanxi, China

Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, P. R. China

Funding

Ministry of Science and Technology of the People's Republic of China · Ministry of Education of the People's Republic of China · National Natural Science Foundation of China · Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology · Shaanxi Province · State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University

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