Fatigue resistant lead-free multilayer ceramic capacitors with ultrahigh energy density

WANG, Ge, LU, Zhilun, YANG, huijing, JI, hongfen, MOSTAED, Ali, LI, linhao, WEI, yiqi, FETEIRA, Antonio, SUN, Shikuan, WANG, Dawei, SINCLAIR, Derek and REANEY, Ian M (2020). Fatigue resistant lead-free multilayer ceramic capacitors with ultrahigh energy density. Journal of Materials Chemistry A.

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Official URL: https://pubs.rsc.org/en/Content/ArticleLanding/202...
Open Access URL: https://pubs.rsc.org/en/content/articlepdf/2020/ta... (Published)
Link to published version:: https://doi.org/10.1039/d0ta00216j
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    Abstract

    The critical role of electrical homogeneity in optimising electric-field breakdown strength (BDS) and energy storage performance in high energy density lead-free capacitors is demonstrated, resulting in exceptional BDS for bulk ceramics and multilayers with values of ~260 and ~950 kV cm-1, respectively. The high BDS gives rise to the record-performance recoverable energy density (Wrec) of 13.8 J cm-3 with an efficiency (η) of 81% in multilayers up to now among all lead/lead-free dielectric materials. The multilayers are temperature stable up to 100 °C, stable with respect to frequency in the range 10-2 to 102 Hz, low strain and fatigue-resistant up to 104 cycles (Wrec variation < 10%). These properties show promise for practical use in pulsed power systems.

    Item Type: Article
    Uncontrolled Keywords: 0303 Macromolecular and Materials Chemistry; 0912 Materials Engineering; 0915 Interdisciplinary Engineering
    Identification Number: https://doi.org/10.1039/d0ta00216j
    SWORD Depositor: Symplectic Elements
    Depositing User: Symplectic Elements
    Date Deposited: 13 May 2020 10:16
    Last Modified: 23 Jun 2020 15:15
    URI: http://shura.shu.ac.uk/id/eprint/26308

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