Self-healing effect based on electrolyte/dielectric co-existence characteristic of sol-gel-derived aluminum oxide thin film

Dielectric capacitors are receiving increasing attention due to the high-power density and fast charge-discharge speed.However,defects are inevitably induced during the preparation process and then weaken the breakdown strength,thereby limiting their energy density.The phenomenon gives rise to self-healing technology.The discovery of sol-gel-derived aluminum oxide with electrolysis and dielectric dual-characteristic provides a novel,simple and cost-effective self-healing method to heal defects and enhance energy density.In this paper,we systematically reviewed the current self-healing technologies and the important progress of electrolysis and dielectric co-existence dielectrics.Finally,we outlook the electrolysis and dielectric co-existence dielectrics and potential challenge.