Superior energy density through tailored dopant strategies in multilayer ceramic capacitors

doi:10.1039/d0ee02104k

SIC OpenIR

	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 Publication	ENERGY & ENVIRONMENTAL SCIENCE
ISSN	1754-5692
Issue	9 Pages:2938
Subtype	Article
Abstract	The 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).
DOI	10.1039/d0ee02104k
WOS Keyword	LEAD-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 Area	Chemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology
Publisher	ROYAL SOC CHEMISTRY
Citation statistics	Cited Times:3[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://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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