Designing lead-free antiferroelectrics for energy storage.

ABSTRACT: Dielectric capacitors, although presenting faster charging/discharging rates and better stability compared with supercapacitors or batteries, are limited in applications due to their low energy density. Antiferroelectric (AFE) compounds, however, show great promise due to their atypical polarization-versus-electric field curves. Here we report our first-principles-based theoretical predictions that Bi_1-xR_xFeO₃ systems (R being a lanthanide, Nd in this work) can potentially allow high energy densities (100-150 J cm^-3) and efficiencies (80-88%) for electric fields that may be within the range of feasibility upon experimental advances (2-3 MV cm^-1). In addition, a simple model is derived to describe the energy density and efficiency of a

SUBMITTER: Xu B 

PROVIDER: S-EPMC5499206 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature