Hongfen Ji
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View article: Enhancing the energy storage capabilities and dielectric temperature stability of Er3+modified-Bi0.5Na0.5TiO3-based high entropy ceramics via defect engineering
Enhancing the energy storage capabilities and dielectric temperature stability of Er3+modified-Bi0.5Na0.5TiO3-based high entropy ceramics via defect engineering Open
The high-entropy ferroelectric ceramics (Bi0.43-0.45xNa0.24-0.36xK0.06-0.09xEr0.6xSr0.27) (Ti0.87Mg0.09Ni0.04)O3 were synthesized by solid-state reaction, which was designed on defect engineering to optimize electrical performance by contr…
View article: Achieving enhanced electrical properties and temperature stability in 0.6BiFeO3–0.4BaTiO3 lead-free piezoelectric textured ceramics
Achieving enhanced electrical properties and temperature stability in 0.6BiFeO3–0.4BaTiO3 lead-free piezoelectric textured ceramics Open
As a promising lead-free and high-temperature piezoelectric material system, BiFeO3–BaTiO3 has drawn increasing research interest. The 0.6BiFeO3–0.4BaTiO3 textured ceramics have been synthesized using the templated grain growth method with…
View article: Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives
Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives Open
Materials exhibiting high energy/power density are currently needed to meet the growing demand of portable electronics, electric vehicles and large-scale energy storage devices. The highest energy densities are achieved for fuel cells, bat…
View article: Mechanism of enhanced energy storage density in AgNbO3-based lead-free antiferroelectrics
Mechanism of enhanced energy storage density in AgNbO3-based lead-free antiferroelectrics Open
The mechanisms underpinning high energy storage density in lead-free Ag1–3xNdxTayNb1-yO3 antiferroelectric (AFE) ceramics have been investigated. Rietveld refinements of in-situ synchrotron X-ray data reveal that the structure remains quad…
View article: Novel BaTiO<sub>3</sub>-Based, Ag/Pd-Compatible Lead-Free Relaxors with Superior Energy Storage Performance
Novel BaTiO<sub>3</sub>-Based, Ag/Pd-Compatible Lead-Free Relaxors with Superior Energy Storage Performance Open
Ceramic dielectrics are reported with superior energy storage performance for applications, such as power electronics in electrical vehicles. A recoverable energy density (Wrec) of ∼4.55 J cm-3 with η ∼ 90% is achieved in lead-free relaxor…
View article: Simultaneously Enhancing Thermal Stable Dielectric Property and Piezoelectric Response in Lead-Free LiNbO3-Modified (K0.5Na0.5)NbO3- (BaNi0.5Nb0.5O3) System
Simultaneously Enhancing Thermal Stable Dielectric Property and Piezoelectric Response in Lead-Free LiNbO3-Modified (K0.5Na0.5)NbO3- (BaNi0.5Nb0.5O3) System Open
Perovskite ferroelectic oxides with simultaneous highly thermal stable dielectric property and piezoelectric response are promising candidate for advanced energy, dielectric, and smart devices. The (1-x)[0.98[(K0.5Na0.5)NbO3]-0.02(BaNi0.5N…
View article: Superior energy density through tailored dopant strategies in multilayer ceramic capacitors
Superior energy density through tailored dopant strategies in multilayer ceramic capacitors Open
Tailored dopant strategies are proposed to optimise the energy density of BiFeO3–SrTiO3, which can be adapted for other high polarisability oxide-based systems.
View article: Fatigue resistant lead-free multilayer ceramic capacitors with ultrahigh energy density
Fatigue resistant lead-free multilayer ceramic capacitors with ultrahigh energy density Open
Electrical homogeneity is vital in optimising energy storage performance in BiFeO3–BaTiO3–xBi(Li0.5Nb0.5)O3 ceramic multilayer capacitors, giving rise to high recoverable energy density ∼13.8 J cm−3 under electric field ∼950 kV cm−1 and fa…