Superior energy density through tailored dopant strategies in multilayer ceramic capacitors
文献类型：期刊论文
| 作者 | Lu, ZL; Wang, G; Bao, WC; Li, JL; Li, LH; Mostaed, A; Yang, HJ; Ji, HF; Li, DJ; Feteira, A |
| 刊名 | ENERGY & ENVIRONMENTAL SCIENCE
 |
| 出版日期 | 2020-09-01 |
| 期号 | 9页码:2938 |
| ISSN号 | 1754-5692 |
| DOI | 10.1039/d0ee02104k |
| 文献子类 | Article |
| 英文摘要 | 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). |
| WOS关键词 | LEAD-FREE CERAMICS ; FREE ANTIFERROELECTRIC CERAMICS ; RELAXOR FERROELECTRIC CERAMICS ; STORAGE DENSITY ; BISMUTH FERRITE ; GRAIN-SIZE ; ELECTRICAL-PROPERTIES ; DIELECTRIC-BREAKDOWN ; PHASE-TRANSITIONS ; TEMPERATURE |
| WOS研究方向 | Chemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://ir.sic.ac.cn/handle/331005/27782]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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