Ultrahigh Energy Storage Density in Superparaelectric-Like Hf_0.2 Zr_0.8 O₂ Electrostatic Supercapacitors.

ABSTRACT: Electrostatic capacitors attract great interest in energy storage fields due to their advantages of high power-density, fast charge/discharge speed, and great reliability. Intensive efforts have been placed on the development of high-energy-density of capacitors. Herein, a novel supercapacitor with Hf_0.2 Zr_0.8 O₂ /xAl₂ O₃ /Hf_0.2 Zr_0.8 O₂ (HAHx) is designed to improve the breakdown strength (E_b ) through optimizing Al₂ O₃ (AO) film thickness. Low-temperature annealing is first proposed to enhance the polarization difference (P_m -P_r ) due to the formation of dispersed polar nanoregions, which is called "superparaelectric-like" similar to previous supe

SUBMITTER: Chen H 

PROVIDER: S-EPMC10288225 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature