Significantly improved energy storage performances of K_0.5Na_0.5NbO₃ lead-free ceramics via a composition optimization strategy

Abstract

Ceramic dielectric materials for energy storage have been widely investigated because of their superiorities of rapid charge/discharge speed and ultra-high power density. However, there are no significant breakthroughs in integrative...

Excellent Energy Storage Performance Achieved in Sr(Sc0.5Nb0.5)O3-Doped Bi0.5Na0.5TiO3-Based Lead-Free Relaxor Ferroelectric Ceramics

“…(f) Comparing values of W rec and η between ceramics x = 0, 0.20, and 0.20 (RRP). (g) Comparison of ESP parameters between this work and other lead-free ceramics. ,,,,,,,,,,,− ,− (h) Temperature-dependent (25–160 °C) and (i) frequency-dependent (1–100 Hz) P–E loops for x = 0.20 (RRP) ceramic.…”

Achieving high overall energy storage performance of KNN-based transparent ceramics by ingenious multiscale designing

“…S6(b) †. By employing the following formula:( a ℏ v ) 2 = A (ℏ v − E g )where ℏ, v , α , and A are the Planck constant, photon frequency, absorption factor, and a constant, respectively, 72 the band gap ( E g ) of (1 − x )KNN– x BCZT with x = 0.1, 0.3, and 0.5 was fitted to be 3.026 eV, 3.005 eV, and 2.970 eV, respectively, as seen in Fig. 6(a).…”

Intrinsic and extrinsic contributions to energy storage performance in potassium sodium niobate–based ceramics

“…[1][2][3] Dielectric ceramic capacitors are extensively applied as core components in power conditioning electronics, modern agriculture, territorial defense applications (e.g., high-power microwave weapons), smart grids, and hybrid electric vehicles. 4,5 However, the inferior recoverable energy density and efficiency of dielectric ceramic capacitors hinder their miniaturization and integration into advanced energy storage and conversion systems. [6][7][8][9] The energy storage performance of a dielectric capacitor is indicated by its charged stored energy density W, recoverable energy density W rec , and energy efficiency η.…”