Functional oxides for energy efficiency : combinatory synthesis and nanostructuration

Oxides are easy to fabricate, low cost, health and environmental friendly and stable in a large range of temperatures. They have a variety of magnetic, mechanic and electric properties which make them essential materials in many fields related to energy efficiency. These properties, often resulting from multiple interactions in competition, vary rapidly according to the composition and their dimensionality (crystals, thin films, massive ceramics, nanopowders, nanowires ...). They also depend on the intrinsic interfaces of materials (grain boundaries ...) or artificial interfaces (composite materials, multilayers). In addition, functionality and performance depend on the micro and / or nanostructure (porosity, exchange surface and stress response).

GREMAN has adopted a multi-scale material approach that addresses issues from the fundamental to the application. The properties targeted by the oxide materials and devices integrating them, concern three aspects of energy efficiency : 

  • Energy harvesting by thermoelectric or piezoelectric effect.
  • Energy storage (micro-batteries Li or Na with nano-structured electrodes, power capacities with materials with high dielectric permittivity).
  • Reducing the energy consumption using materials with adjustable permittivity, permeability or emissivity.



Core-Shell" structure materials for multilayer ceramic capacitors with a high capacitance
Project of Région Centre-Val de Loire (2014-2017).
Coordinator: GREMAN (C. Autret).
Partners : Laboratoire GREMAN, SRT Microcéramique (Vendôme).


K, Na) NiObates dopés pour de nouveaux PiEzoElectriques
Project of Région Centre-Val de Loire (2014-2017).
Coordinator: GREMAN (I. Monot-Laffez).
Partners: Laboratoire GREMAN, LSPM paris 13, ISTO université Orléans, Vermon.


Mécanisme de vieillissement et dégradation des céramiques dans les piles électrochimiques (2015-2016)
Project of Région Centre-Val de Loire/CEA.
Coordinator: GREMAN (C Autret).
Partners: GREMAN, CEA Le Ripault.


Sodium Ion Batteries : EneRgy for the Strategy of Innovation in the cenTer rEgion
Project of Région Centre-Val de Loire (2016-2019).
Coordinator: CEA Le Ripault, Société VLAD (Tours).
Partners: Laboratoire GREMAN, Laboratoire PCM2E (université de Tours).


Supercondensateurs de haute énergie à base d’oxydes nanotexturés
Project of Région Centre-Val de Loire (2014-2016).
Coordinator: CEHMTI, Université d’Orléans.
Partners: laboratoire GREMAN, laboratoire CEMHTI (université d’Orléans), CEA Le Ripault.


INTerfaces in thin fiIMs - Capacitors 2015 -
Project of Région Centre-Val de Loire (2012-2016).
Coordinator: GREMAN (A Ruyter).
Partners: Laboratoire ICMN (université d’Orléans / CNRS).


MicrogEnérateur ThermoElectrique à base d’Oxydes
Project of Région Centre-Val de Loire (2015-2018).
Coordinator: GREMI.
Partners: Laboratoire GREMI (université d’Orléans / CNRS), Laboratoire GREMAN, Laboratoire CRISMAT (Université de Caen), ST Microelectronics.


Acquisition d’un équipement de frittage par Spark Plasma Sintering (SPS) pour l’activité de nombreux projets du laboratoire GREMAN et des laboratoires matériaux Orléans-Tours (2015-2017).
Financer: FEDER/CPER Région Centre Val de Loire.
Coordinator: GREMAN (I. Monot-Laffez).


Dépôt d'oxyde par voie polymérique sur substrat structuré 3D
Project of Région Centre-Val de Loire/CEA - LAVOISIER (2015-2016).
Project's leader: GREMAN (N. Poirot).
Partners: Laboratoire GREMAN, Laboratoire PCM2E (université de Tours) CEA Le Ripault.