Ultrahigh energy storage density and superior discharge power density in a novel antiferroelectric lead hafnate

Investigation on antiferroelectricity of Pb0.97La0.02(Hf1−xTix)O3ceramics with low Ti content (0 ≤ x ≤ 0.1)

“…In addition, weak but present satellite reflections (*) can also be found, indicating that the structure is superlattice. According to the previous studies on PbHfO 3 and by observing the splitting of (2 0 0) perovskite reflection, the structure is orthorhombic 20,23,31 . Further look at the evolution of superlattice reflections, a phase transition can be found between 0.04 < x < 0.06.…”

“…According to the previous studies on PbHfO 3 and by observing the splitting of (2 0 0) perovskite reflection, the structure is orthorhombic. 20,23,31 Further look at the evolution of superlattice reflections, a phase transition can be found between 0.04 < x < 0.06. When x ≤ 0.04, these superlattice reflections can be assigned to G ± 1/4(1 1 0) satellite reflections (G denotes parent reflections) and are caused by the antiparallel Pb cation displacements (AFE) along the cubic perovskite (1−10) direction, 32 which is in good agreement with the AFE distortion observed in the PbHfO 3 (AFE O structure, space group: Pbam).…”

A room-temperature antiferroelectric in hybrid perovskite enables highly efficient energy storage at low electric fields

“…5c and Table S5 † ). 52 The high energy storage efficiency signifies the low energy dissipation, which will less easily transform into thermal energy, thus drastically promoting its energy storage capacity. Such an ultrahigh energy efficiency at room temperature, together with the low critical fields, demonstrates the great potential of 1 for the application of energy storage with high practicability.…”

Ultra-High Energy Storage Performance in BNT-based Ferroelectric Ceramics with Simultaneously Enhanced Polarization and Breakdown Strength

“…New energy is undergoing vigorous development to reduce the carbon emissions and meet the long-term goal of carbon neutrality. Energy storage devices are in urgent demand in new energy industries. − Ferroelectric ceramics are of great interest in the energy storage applications, especially in the form of multilayer ceramic capacitors (MLCCs), because of the high capacitance and fast charge–discharge capability. , However, the energy density of ferroelectric ceramics is always limited by the relatively low breakdown strength. Further, high-temperature dielectric materials have drawn much attention as the electronic equipment is required to be operated at a high temperature beyond 200 °C in many emerging industries, such as aeronautics and astronautics, deep oil drilling, new-energy vehicle, and gas exploration. , A practical challenge for ferroelectric ceramics is the rapidly increased leakage current at high temperatures, which leads to the sharply increased dielectric loss and greatly reduced energy efficiency.…”