Multi-objective Collaborative Design Optimized Highly Efficient Energy Capacitive Lead-Free Relaxor Ferroelectrics

Highly efficient capacitive ESP with a high W rec (6.82 J cm −3 ) and η (90%), concurrent with an ultrahigh W rec / E b of ∼0.01624 μC cm −2 , as well as superior stability and charge/discharge performance are gained via multi-objective collaboration design.