气候变化领域集成服务门户(CCPortal): Superior energy density through tailored dopant strategies in multilayer ceramic capacitors

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DOI	10.1039/d0ee02104k
	Superior energy density through tailored dopant strategies in multilayer ceramic capacitors
	Lu Z.; Wang G.; Bao W.; Li J.; Li L.; Mostaed A.; Yang H.; Ji H.; Li D.; Feteira A.; Xu F.; Sinclair D.C.; Wang D.; Liu S.-Y.; Reaney I.M.
发表日期	2020
ISSN	17545692
起始页码	2938
结束页码	2948
卷号	13 期号:9
英文摘要	The Gerson-Marshall (1959) relationship predicts an increase in dielectric breakdown strength (BDS) and therefore, recoverable energy density (Wrec) with decreasing dielectric layer thickness. This relationship only operates however, if the total resistivity of the dielectric is sufficiently high and the electrical microstructure is homogeneous (no short circuit diffusion paths). BiFeO3-SrTiO3 (BF-ST) is a promising base for developing high energy density capacitors but Bi-rich compositions which have the highest polarisability per unit volume are ferroelectric rather than relaxor and are electrically too conductive. Here, we present a systematic strategy to optimise BDS and maximum polarisation via: (i) Nb-doping to increase resistivity by eliminating hole conduction and promoting electrical homogeneity and (ii) alloying with a third perovskite end-member, BiMg2/3Nb1/3O3 (BMN), to reduce long range polar coupling without decreasing the average ionic polarisability. These strategies result in an increase in BDS to give Wrec = 8.2 J cm-3 at 460 kV cm-1 for BF-ST-0.03Nb-0.1BMN ceramics, which when incorporated in a multilayer capacitor with dielectric layers of 8 μm thickness gives BDS > 1000 kV cm-1 and Wrec = 15.8 J cm-3. This journal is © The Royal Society of Chemistry.
英文关键词	Ceramic capacitors; Multilayers; Perovskite; Polarization; Strontium titanates; Dielectric breakdown strength; Dielectric layer; Electrical homogeneity; High energy density capacitors; Multi-layer ceramic capacitor; Multilayer capacitors; Recoverable energy; Short-circuit diffusion; Capacitors; bismuth; ceramics; dielectric property; electrical conductivity; electrical resistivity; microstructure; perovskite
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189567
作者单位	Department of Materials Science and Engineering, University of Sheffield, Sheffield, S1 3JD, United Kingdom; Henry Royce Institute Sir Robert, Hadfield Building, Sheffield, S1 3JD, United Kingdom; State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Shanghai, 200050, China; Electronic Materials Research Laboratory, Key Laboratory, Ministry of Education, International Center for Dielectric Research, Xi'An Jiaotong University, Xi'an Shaanxi, 710049, China; Department of Materials, University of Oxford, Parks Road, Oxford, OX1 3PH, United Kingdom; Department of Physics, Tangshan Normal University, Tangshan, 063000, China; Laboratory of Thin Film Techniques and Optical Test, Xi'An Technological University, Xi'an, 710032, China; College of Physics and Materials Science, Tianjin Normal University, Tianjin, 300387, China; Materials and Engineering Research Institute, Sheffield Hallam University, Sheffield, S1 1WB, United Kingdom
推荐引用方式 GB/T 7714	Lu Z.,Wang G.,Bao W.,et al. Superior energy density through tailored dopant strategies in multilayer ceramic capacitors[J],2020,13(9).
APA	Lu Z..,Wang G..,Bao W..,Li J..,Li L..,...&Reaney I.M..(2020).Superior energy density through tailored dopant strategies in multilayer ceramic capacitors.Energy & Environmental Science,13(9).
MLA	Lu Z.,et al."Superior energy density through tailored dopant strategies in multilayer ceramic capacitors".Energy & Environmental Science 13.9(2020).