Simultaneous achievement of ultrahigh energy storage density and high efficiency in BiFeO3-based relaxor ferroelectric ceramics via a highly disordered multicomponent design

The synergistic contributions of high P max , small P r and large E b endow the BiFeO 3 -based ceramics with relaxor ferroelectric characteristics, due to which an ultrahigh W rec of 13.9 J cm −3 and high η of 89.6% have been achieved synchronously.