Publication

Antiferroelectric Multilayers Devices: a Platform for Energy and Information Storage

Mihai Adrian Ionescu, Igor Stolichnov
2026

Abstract

This work demonstrates a multifunctional platform that integrates energy storage and multi-bit memory capabilities using multilayer structures composed of antiferroelectric (AFE) Si:HfO2 layers with interleaved dielectric (DE) layers. We have fabricated multilayer AFE/dielectric capacitors with ultrathin 1 nm Al2O3 DE layers between the functional 10 nm AFE layers with up to 4 layers of Al2O3 and 4 layers of AFE, exploiting the internal built-in electric fields, with energy storage density up to 50 J/cm3, and enable stable, voltage-dependent multi-bit operation. The functions of energy and information storage within a compact doped-hafnia platform show the way towards a qualitatively new level of integration for future autonomous low-power systems for information processing. Our findings highlight a promising route for energy-efficient, high-density memory in next-generation electronics.

Official source

https://infoscience.epfl.ch/entities/publication/0bdf4397-e1e4-488c-a859-ce34fc171c1f

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Mihai Adrian Ionescu, Igor Stolichnov
2026

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/0bdf4397-e1e4-488c-a859-ce34fc171c1f

About this result

Related concepts (32)

Grid energy storage

Grid energy storage (also called large-scale energy storage) is a collection of methods used for energy storage on a large scale within an electrical power grid. Electrical energy is stored during times when electricity is plentiful and inexpensive (especially from intermittent power sources such as renewable electricity from wind power, tidal power and solar power) or when demand is low, and later returned to the grid when demand is high, and electricity prices tend to be higher.

Compressed-air energy storage

Compressed-air energy storage (CAES) is a way to store energy for later use using compressed air. At a utility scale, energy generated during periods of low demand can be released during peak load periods. The first utility-scale CAES project has been built in Huntorf, Germany, and is still operational. The Huntorf plant was initially developed as a load balancer for fossil fuel-generated electricity, the global shift towards renewable energy renewed interest in CAES systems, to help highly intermittent energy sources like photovoltaics and wind satisfy fluctuating electricity demands.

Thermal energy storage

Thermal energy storage (TES) is achieved with widely different technologies. Depending on the specific technology, it allows excess thermal energy to be stored and used hours, days, months later, at scales ranging from the individual process, building, multiuser-building, district, town, or region. Usage examples are the balancing of energy demand between daytime and nighttime, storing summer heat for winter heating, or winter cold for summer air conditioning (Seasonal thermal energy storage).

Related publications (32)

Antiferroelectric Multilayers Devices: a Platform for Energy and Information Storage

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