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Enhanced energy density and electric cycling reliability via MnO2modification in sodium niobate-based relaxor dielectric capacitors

Journal Article


Abstract


  • Sodium niobate (NaNbO3)-based dielectrics have received much attention for energy storage applications due to their low-cost, lightweight, and nontoxic nature. The field-induced metastable ferroelectric phase in NaNbO3-based dielectrics, however, leads to a large hysteresis of the polarization-electric field (P-E) loops and hence deteriorate the energy storage performance. In this study, the hysteresis was successfully reduced by introducing Bi3+and Ti4+into A-site and B-site of NaNbO3, respectively. MnO2addition was added to further increase the ceramic density and enhance the cycling reliability. As a result, a high recoverable energy density of 4.3 J/cm3and a high energy efficiency of 90% were simultaneously achieved in the ceramic capacitor at an applied electric field of 360 kV/cm. Of particular importance is that the ceramic capacitor exhibits a stable energy storage properties over a wide temperature range of -70 to 170 °C, with much improved electric cycling reliability up to 105cycles.

Publication Date


  • 2020

Citation


  • Yang, L., Kong, X., Cheng, Z., & Zhang, S. (2020). Enhanced energy density and electric cycling reliability via MnO2modification in sodium niobate-based relaxor dielectric capacitors. Journal of Materials Research. doi:10.1557/jmr.2020.300

Scopus Eid


  • 2-s2.0-85095441736

Web Of Science Accession Number


Abstract


  • Sodium niobate (NaNbO3)-based dielectrics have received much attention for energy storage applications due to their low-cost, lightweight, and nontoxic nature. The field-induced metastable ferroelectric phase in NaNbO3-based dielectrics, however, leads to a large hysteresis of the polarization-electric field (P-E) loops and hence deteriorate the energy storage performance. In this study, the hysteresis was successfully reduced by introducing Bi3+and Ti4+into A-site and B-site of NaNbO3, respectively. MnO2addition was added to further increase the ceramic density and enhance the cycling reliability. As a result, a high recoverable energy density of 4.3 J/cm3and a high energy efficiency of 90% were simultaneously achieved in the ceramic capacitor at an applied electric field of 360 kV/cm. Of particular importance is that the ceramic capacitor exhibits a stable energy storage properties over a wide temperature range of -70 to 170 °C, with much improved electric cycling reliability up to 105cycles.

Publication Date


  • 2020

Citation


  • Yang, L., Kong, X., Cheng, Z., & Zhang, S. (2020). Enhanced energy density and electric cycling reliability via MnO2modification in sodium niobate-based relaxor dielectric capacitors. Journal of Materials Research. doi:10.1557/jmr.2020.300

Scopus Eid


  • 2-s2.0-85095441736

Web Of Science Accession Number