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Grenoble INP
Personnels du laboratoire
Personnels du laboratoire

M. GRAS Matthieu

PhD student in the LEPMI,Interfacial Electrochemistry team (INP-Grenoble) Industrial partnership with RECUPYL


LEPMI/Phelma Campus 1130 rue de la piscine BP75 38402 Saint Martin D'Hères

  • Fax : 33 (0)4 76 82 67 77

  • Bureau 1 : 333

Site internet : http://

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Recycling NiMH batteries using green chemistry based on ionic liquids:

NiMH batteries are the technology dominating the market of energy storage for hybrid electric vehicles (HEV) as well as portable tools however the recycling rate of those devices are currently low. In addition, the existing processes are not sustainable because they use hazardous materials and are energy consuming.
NiMH batteries contain various valuable metals such as Co, Ni, Mn and mixtures of lanthanides (Ln) including La, Ce, Pr, Nd. Lanthanides are part of the rare earth elements are among the 20 critical metals as classified by the European Commission.
To respond to those environmental and economic issues, the aim of this project is to develop new methods for the selective separation of different elements in NiMH batteries, including rare earth metals.
In order to fit with the green chemistry movement, it is necessary to eliminate the use and generation of hazardous substances. Volatile organic solvents should thus be replaced by safe, non-flammable and non-volatile ionic liquids.

This work will be carried out in collaboration between a recycling company called Recupyl and the LEPMI lab and will be financially supported with a PhD grant provided by the CEMAM labex

Activités / CV

Academic Background:
PhD thesis on the recycling of NiMH batteries using green chemistry based on Ionic Liquid between the LEPMI lab and the corporate RECUPYL
BS in materials chemistry at the University of Montpellier
HND in chemistry at the IT of Sète

Professional Experience:
Institute for Frontier Materials (IFM) at the University of Deakin (Melbourne, Australia): A novel ionic liquid electrolyte for sodium batteries
Company « Les salins du midi » : Crystallization optimization of “fleur de sel”
Volcanic and Seismologic Observatory of Guadeloupe: Geochemical monitor of the Soufriere volcano

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Rédigé par Matthieu Gras

mise à jour le 14 mars 2017

Communauté Université Grenoble Alpes
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