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Superior energy density through tailored dopant strategies in multilayer ceramic capacitors
Lu, ZL; Wang, G; Bao, WC; Li, JL; Li, LH; Mostaed, A; Yang, HJ; Ji, HF; Li, DJ; Feteira, A; Xu, FF; Sinclair, DC; Wang, DW; Liu, SY; Reaney, IM
2020-09-01
Source PublicationENERGY & ENVIRONMENTAL SCIENCE
ISSN1754-5692
Issue9Pages:2938
SubtypeArticle
AbstractThe Gerson-Marshall (1959) relationship predicts an increase in dielectric breakdown strength (BDS) and therefore, recoverable energy density (W-rec) 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 polarisationvia: (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 giveW(rec)= 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 mu m thickness gives BDS > 1000 kV cm(-1)andW(rec)= 15.8 J cm(-3).
DOI10.1039/d0ee02104k
WOS KeywordLEAD-FREE CERAMICS ; FREE ANTIFERROELECTRIC CERAMICS ; RELAXOR FERROELECTRIC CERAMICS ; STORAGE DENSITY ; BISMUTH FERRITE ; GRAIN-SIZE ; ELECTRICAL-PROPERTIES ; DIELECTRIC-BREAKDOWN ; PHASE-TRANSITIONS ; TEMPERATURE
Language英语
WOS Research AreaChemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27782
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Lu, ZL,Wang, G,Bao, WC,et al. Superior energy density through tailored dopant strategies in multilayer ceramic capacitors[J]. ENERGY & ENVIRONMENTAL SCIENCE,2020(9):2938.
APA Lu, ZL.,Wang, G.,Bao, WC.,Li, JL.,Li, LH.,...&Reaney, IM.(2020).Superior energy density through tailored dopant strategies in multilayer ceramic capacitors.ENERGY & ENVIRONMENTAL SCIENCE(9),2938.
MLA Lu, ZL,et al."Superior energy density through tailored dopant strategies in multilayer ceramic capacitors".ENERGY & ENVIRONMENTAL SCIENCE .9(2020):2938.
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