Lead‐Free High Permittivity Quasi‐Linear Dielectrics for Giant Energy Storage Multilayer Ceramic Capacitors with Broad Temperature Stability

WANG, Xinzhen, SONG, Xiaojie, FAN, Yongbo, LI, Linhao, WANG, Dawei, FETEIRA, Antonio, LU, Zhilun, SINCLAIR, Derek C., WANG, Ge and REANEY, Ian M. (2024). Lead‐Free High Permittivity Quasi‐Linear Dielectrics for Giant Energy Storage Multilayer Ceramic Capacitors with Broad Temperature Stability. Advanced Energy Materials.

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Official URL: https://onlinelibrary.wiley.com/doi/10.1002/aenm.2...
Open Access URL: https://onlinelibrary.wiley.com/doi/epdf/10.1002/a... (Published version)
Link to published version:: https://doi.org/10.1002/aenm.202400821


Electrostatic energy storage capacitors are essential passive components for power electronics and prioritize dielectric ceramics over polymer counterparts due to their potential to operate more reliably at > 100 ˚C. Most work has focused on non‐linear dielectrics compositions in which polarization (P)/electric displacement (D) and maximum field (Emax) are optimized to give values of energy density, 6≤U≤21 J cm−3. In each case however, either saturation (dP/dE = 0, AFE) or “partial” saturation (dP/dE → 0, RFE) of P limits the value of U which can be achieved before breakdown. It is proposed that U can be further improved with respect to relaxors (RFEs) and anti‐ferroelectrics (AFEs) by designing high permittivity quasi‐linear dielectric (QLD) behaviour in which dP/dE remains constant up to ultrahigh Emax. QLD multilayer capacitor prototypes with dielectric layers composed of 0.88NaNb0.9Ta0.1O3‐0.10SrTiO3‐0.02La(Mg1/2Ti1/2)O3 deliver room temperature U ≈ 43.5 J cm−3, supporting an extremely‐large Emax ≈ 280 MV m−1, both of which exceed current state‐of‐art by a factor of two for devices based on powder, tape‐cast technology. Importantly QLD capacitors exhibit scant variation in U (≈15 J cm−3) up to > 200 ˚C and robust resistance to cyclic degradation, offering a promising new approach for the development of sustainable technology.

Item Type: Article
Additional Information: ** Article version: VoR ** From Wiley via Jisc Publications Router ** Licence for VoR version of this article: http://creativecommons.org/licenses/by/4.0/ **Journal IDs: issn 1614-6832; issn 1614-6840 **Article IDs: publisher-id: aenm202400821 **History: published_online 25-05-2024; rev-recd 30-04-2024; submitted 21-02-2024
Uncontrolled Keywords: dP(Polarization)/dE(Electric field), high permittivity, quasi linear dielectric, multilayer ceramic capacitors, energy storage
Research Institute, Centre or Group - Does NOT include content added after October 2018: Sheffield Hallam Doctoral Theses
Identification Number: https://doi.org/10.1002/aenm.202400821
SWORD Depositor: Colin Knott
Depositing User: Colin Knott
Date Deposited: 31 May 2024 15:11
Last Modified: 31 May 2024 15:15
URI: https://shura.shu.ac.uk/id/eprint/33765

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