Does high entropy affect energy storage performance?

As a result, a giant Wrec ~10.06 J cm −3 and an ultrahigh η ~90.8% are simultaneously achieved in the KNN-H ceramic, showing a significant promotional effect of the high-entropy strategy on the energy storage performance (236% for Eb, 1729% for Wrec, 68% for η, Supplementary Fig. 6c).

What is a low recoverable energy storage density?

However, the low recoverable energy storage density (Wrec generally <4 J cm −3) greatly limits the application fields of ceramic capacitors and their development toward device miniaturization and intelligence.

How is energy-storage performance calculated?

An overall estimation of energy-storage performance, calculated as UF = Ue / (1 − η) (34), reached a high value of 153.8 owing to the combined high Ue and ultrahigh η.

How can domain engineering improve energy storage performance?

A wide range of domain engineering techniques, such as introducing polar nanoregions, [12, 13] implementing superparaelectric relaxor strategies, [10, 14] and employing multilayer film stacking, [15, 16] play a crucial role in substantially improving energy storage performance.

What is the thermal stability of energy-storage performance?

We then measured the thermal stability of the energy-storage performance in the range of −55° to 100°C (Fig. 4E and fig. S20). The MLCCs show good performance stability at an electric field of 500 and 700 kV cm −1 with degradation below ~10% for Ue and η over the entire measurement temperature range.

Why are high-performance and environmental-friendly materials for energy storage important?

With the increasing demand for renewable energy as well as boosting attention on environmental problems, the high-performance and environmental-friendly materials for energy storage have inspired more and more research interests worldwide , , .