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

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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. [Article]

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26308:550157

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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.

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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...

Open Access Version:

Published

Uncontrolled Keywords:

0303 Macromolecular and Materials Chemistry; 0912 Materials Engineering; 0915 Interdisciplinary Engineering

Identifiers

Identification Number:

10.1039/d0ta00216j