Modified Sodium niobate-based 0.76(NaNbO3)-0.24(Sr0.55La0.3TiO3) ceramics for energy storage
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Date
2023
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Publisher
Elsevier BV
Abstract
Because of their fast discharge speed and excellent fatigue resistance, dielectric ceramics are highly sought after for electronic systems. However, the low energy density caused by the low breakdown electric field leads to poor volumetric efficiency, which is the main challenge for dielectric ceramics in practical applications. Through a ramp-soak-spike (RSS) strategy, we propose a system based on lead-free materials (Sodium niobate precursors) with an enhanced breakdown electric field, resulting in an exquisite energy storage density within perovskite NaNbO3-based ceramics. The current study developed a superior 0.76(NaNbO3)-0.24(Sr0.55La0.3TiO3) ceramics system, abbreviated ME-RSS, for ramp-soak-spike sintering with a high recoverable energy density (Wrec) of 5.8 J cm−3, an efficiency (η) of 85% and high breakdown strength of approximately 440 kVcm−1. Despite these remarkable properties, the system can withstand a high number of cycles as well as a high charge-discharge speed. The current study proposes NaNbO3-based ceramics designed via a RSS sintering route through doping to improve dielectric ceramic breakdown strength, which is expected to benefit a wide range of dielectric ceramic applications requiring high breakdown strength, such as high-voltage capacitors and electrocaloric solid-state cooling devices.
Description
Abstract. Full-text available at https://doi.org/10.1016/j.matchemphys.2023.127983
Keywords
Dielectric ceramics, Fast discharge speed, Fatigue resistance, Energy density, Breakdown electric field, Volumetric efficiency, Ramp-soak-spike (RSS) strategy, Lead-free materials, Sodium niobate precursors, Perovskite NaNbO3, Energy storage density, ME-RSS ceramics, Recoverable energy density, Efficiency, Breakdown strength, Charge-discharge speed, Doping, High-voltage capacitors, Electrocaloric cooling devices.
Citation
Emmanuel, M. (2023). Modified Sodium niobate-based 0.76 (NaNbO3)-0.24 (Sr0. 55La0. 3TiO3) ceramics for energy storage. Materials Chemistry and Physics, 305, 127983.