Investigation of electrical and electric energy storage properties of La -doped Na0.3 Sr0.4Bi0.3TiO3 based Pb-free ceramics

Outstanding Energy Storage Performance of Na0.5Bi0.5TiO3-BaTiO3-(Sr0.85Bi0.1)(Mg1/3Nb2/3)O3 Lead-Free Ceramics

“…It is worth noting that the η value can continue to remain at 89% under 30 kV/mm. To show the excellent energy storage ability of current ceramics, Figure shows a comprehensive comparison of the energy storage parameters between our ceramic and other NBT-based energy storage ceramic materials reported over the past 3 years. ,,,− Clearly, the energy storage properties of the present ceramic are better than those of most of the other ceramics. Figure S4a–d shows that the ceramic also exhibits excellent frequency and temperature stabilities.…”

Effect of La substitution on energy storage properties of (Bi0.2Na0.2Ca0.2Ba0.2Sr0.2)TiO3 lead‐free high‐entropy ceramics

“…As the test temperature ascends, the semi-arc of all the samples becomes smaller, and the resistance gradually decreases because the carrier density increases synchronously. 20,25,26,51 The incorporation of La improves the resistivity of the HECs, which can be ascribed to the reduction of grain size by La doping, thus promoting the grain boundaries and compacting the ceramics during ceramic sintering. 52 It is known that the activation energy (E a ) is considered to be relevant to the potential energy barrier, which limits the movement of charge carriers.…”

“…As an example, La 3+ ions were used to regulate the grain size of lead-free ferroelectrics. [24][25][26][27] Xu et al reported that [(Bi 0.5 Na 05 ) 0.93 Ba 0.07 ] 1-x La x TiO 3 ceramics exhibited compact microstructures with fine grains and that the breakdown field strength drastically improved by La doping, resulting in a maximum W rec of 1.21 J/cm 3 for 0.04La sample. 25 Liu et al 26 revealed that the grain size of La-doped Na 0.3 Bi 0.3 Sr 0.4 TiO 3 significantly reduced, thus increasing the E b , and the obtained Na 0.3 Sr 0.4 Bi 0.3 TiO 3 -0.02La ceramic displayed high W rec (1.67 J/cm 3 ) and E b (190 kV/cm).…”

“…[24][25][26][27] Xu et al reported that [(Bi 0.5 Na 05 ) 0.93 Ba 0.07 ] 1-x La x TiO 3 ceramics exhibited compact microstructures with fine grains and that the breakdown field strength drastically improved by La doping, resulting in a maximum W rec of 1.21 J/cm 3 for 0.04La sample. 25 Liu et al 26 revealed that the grain size of La-doped Na 0.3 Bi 0.3 Sr 0.4 TiO 3 significantly reduced, thus increasing the E b , and the obtained Na 0.3 Sr 0.4 Bi 0.3 TiO 3 -0.02La ceramic displayed high W rec (1.67 J/cm 3 ) and E b (190 kV/cm). Li et al synthesized lead-free La-substituted 0.72Na0.5Bi0.5TiO3-0.28Sr0.7Bi0.2TiO3 and showed that La addition effectively decreased the grain size and generated a large E b , achieving the optimum W rec (1.2 J/cm 3 ) for 0.005La-substituted ceramic under an E b of 90 kV/cm.…”

Advances and Perspectives for the Application of Perovskite Oxides in Supercapacitors

“…Then, partial substitutes of Ti with Mn in SrTiO 3 could optimize the electrochemical characteristics and induce the ferroelectric behavior . Subsequently, Zhang et al reported that the Na and Bi cations were simultaneously doped into the A site of SrTiO 3 to reduce the potential polarization of SCs. ,, However, the stability of SrTiO 3 modified by heteroatom doping needs to be intensely considered, despite its good prospects in dielectric materials. Considering the ultrahigh capacitance of NiO, Kitchamsetti et al synthesized the mesoporous NiTiO 3 rods as an electrode for SCs, revealing the capacitance of 542.26 F g –1 in KOH electrolytes, owing to the rapid interfacial reaction …”