Giant energy density and high efficiency achieved in bismuth ferrite-based film capacitors via domain engineering.

ABSTRACT: Developing high-performance film dielectrics for capacitive energy storage has been a great challenge for modern electrical devices. Despite good results obtained in lead titanate-based dielectrics, lead-free alternatives are strongly desirable due to environmental concerns. Here we demonstrate that giant energy densities of ~70 J cm-3, together with high efficiency as well as excellent cycling and thermal stability, can be achieved in lead-free bismuth ferrite-strontium titanate solid-solution films through domain engineering. It is revealed that the incorporation of strontium titanate transforms the ferroelectric micro-domains of bismuth ferrite into highly-dynamic polar nano-regions, resulting in a ferroelectric to relaxor-ferroelectric transition with concurrently improved energy densi

SUBMITTER: Pan H 

PROVIDER: S-EPMC5940880 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature