Journal of Advanced Dielectrics, Volume. 13, Issue 1, 2242005(2023)
Ultra-fast charge-discharge and high-energy storage performance realized in KNaNbO3-Bi(MnNi)O3 ceramics
Xinru Nie1, Yan He1, Qiangqiang Shi1, Yuqian Liang1, Lingling Wei1, Pengfei Liang2, Xiaolian Chao1,3、*, Guoxin Hu1、**, and Zupei Yang1、***
Author Affiliations
1Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an, 710062, Shaanxi, P. R. China2School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an, 710062, Shaanxi, P. R. China3School of Physics and Information Technology, Shaanxi Normal University, Xi’an, 710062, Shaanxi, P. R. Chinashow less
Lead-free relaxor ceramics (1 − )KNaNbO3 − Bi(MnNi)O3 ((1 − )KNN-BMN) with considerable charge–discharge characteristics and energy storage properties were prepared by a solid state method. Remarkable, a BMN doping level of 0.04, 0.96KNN–0.04BMN ceramic obtained good energy storage performance with acceptable energy storage density of 1.826 J/cm3 and energy storage efficiency of 77.4%, as well as good frequency stability (1–500 Hz) and fatigue resistance (1–5000 cycles). Meanwhile, a satisfactory charge–discharge performance with power density 98.90 MW/cm3, discharge time < 70 ns and temperature stability (30–180∘C) was obtained in 0.96KNN–0.04BMN ceramic. The small grain size (150 nm) and the high polarizability of Bi are directly related to its good energy storage capacity. This work proposes a feasible approach for lead-free KNN-based ceramics to achieve high-energy storage and ultra-fast charge–discharge performance as well as candidate materials for the application of advanced high-temperature pulse capacitors.Lead-free relaxor ceramics (1 − )KNaNbO3 − Bi(MnNi)O3 ((1 − )KNN-BMN) with considerable charge–discharge characteristics and energy storage properties were prepared by a solid state method. Remarkable, a BMN doping level of 0.04, 0.96KNN–0.04BMN ceramic obtained good energy storage performance with acceptable energy storage density of 1.826 J/cm3 and energy storage efficiency of 77.4%, as well as good frequency stability (1–500 Hz) and fatigue resistance (1–5000 cycles). Meanwhile, a satisfactory charge–discharge performance with power density 98.90 MW/cm3, discharge time < 70 ns and temperature stability (30–180∘C) was obtained in 0.96KNN–0.04BMN ceramic. The small grain size (150 nm) and the high polarizability of Bi are directly related to its good energy storage capacity. This work proposes a feasible approach for lead-free KNN-based ceramics to achieve high-energy storage and ultra-fast charge–discharge performance as well as candidate materials for the application of advanced high-temperature pulse capacitors.
