PhD subjects

1 sujet INAC

Dernière mise à jour : 19-04-2018


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• Materials and applications

 

Development of 3D graphene/Si nanostructures nanocomposites for ultrastable supercapacitor

SL-DRF-18-0318

Research field : Materials and applications
Location :

SYstèmes Moléculaires et nanoMatériaux pour l’Energie et la Santé (SyMMES)

Conception d’architectures moléculaires et processus électroniques (CAMPE)

Grenoble

Contact :

Florence DUCLAIROIR

Lionel DUBOIS

Starting date : 01-11-2018

Contact :

Florence DUCLAIROIR

CEA - DSM/INAC/SYMMES/CAMPE

04 38 78 53 68

Thesis supervisor :

Lionel DUBOIS

CEA - DSM/INAC/SyMMES/CAMPE

04 38 78 92 57

Graphene is a material that is being widely explored for its potential applications notably in the field of energy (batteries, supercapacitor, fuel-cell catalyst…). Indeed it was described that graphene could be used as additive for the development of new negative electrodes for Li-ion batteries for example. In parallel, Si nanostructures (SiNSs) have been developed and tested in micro-supercapacitor cells and showed an amazing long cyclability (over millions of cycles) while the specific capacitance achieved could be improved.

The aim of this PhD project, conducted in collaboration between INAC/SyMMES and INAC/PHELIQS, is to develop methods to stabilize the Si nanostructures/electrolyte interface and to grow these Si NSs inside a graphene structured matrix to increase the surface area and thereby increase the capacitive properties of the micro-supercapacitor in terms of specific capacitance, power and energy densities. The growth of Si NSs inside a graphene matrix will also allow to decouple the NSs from a 2D substrate. Thus higher amount of material may be obtained, and supercapacitor rather than micro supercapacitor applications will be tested.

 

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