Fig. 1: Energy storage properties of (1-x)KNN-xSNZ ceramics.

a–d Ambient temperature P-E loops measured under various electric fields of a x = 0.14, b x = 0.15, c x = 0.16, d x = 0.18. e–h Composition-dependent energy storage parameters (W_rec, W_total, and η) of e x = 0.14, f x = 0.15, g x = 0.16, h x = 0.18.