Is ultrahigh recoverable energy storage density a bottleneck?

However, thus far, the huge challenge of realizing ultrahigh recoverable energy storage density (Wrec) accompanied by ultrahigh efficiency (η) still existed and has become a key bottleneck restricting the development of dielectric materials in cutting-edge energy storage applications.

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.

Does 0.8bnst-0.2clt provide a superior recoverable energy storage density?

The results illustrate that 0.8BNST-0.2CLT presents superior recoverable energy storage density ≈8.3 J cm −3 with the ideal η ≈ 80% at 660 kV cm −1. Structural characterizations demonstrate that there is the intermediate modulated phase with the coexistence of the antiferroelectric and ferroelectric phases.

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 are the energy storage characteristics of MLCCs?

As a result, stunning energy storage characteristics, i.e., a giant recoverable energy density of 22.0 J cm −3 with an ultrahigh energy efficiency of 96.1% are achieved in our MLCCs. This is the highest recoverable energy density achieved in MLCCs with an efficiency surpassing 95%.

Can ultrahigh energy density and power density overcome the capacity–speed trade-off?

This simultaneous demonstration of ultrahigh energy density and power density overcomes the traditional capacity–speed trade-off across the electrostatic–electrochemical energy storage hierarchy1,16.