BrainMap

Mr. Cristian Silvestru

Professor

Professor - UNIVERSITATEA BABES BOLYAI

Researcher | Teaching staff | Scientific reviewer | Manager

Web of Science ResearcherID: A-3832-2010

Curriculum Vitae (14/06/2020)

Expertise & keywords

The improvement of the manufacturing technology of lead-acid batteries to be used for start-and-stop automobiles Call name: Joint Applied Research Projects - PCCA 2013 - call
PN-II-PT-PCCA-2013-4-1226 2014 - 2017

Role in this project:

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M

Project partners: INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO); UNIVERSITATEA BABES BOLYAI (RO); ROMBAT S.A. (RO)

Affiliation: UNIVERSITATEA BABES BOLYAI (RO)

Project website: http://www.itim-cj.ro/PNCDI/rombss/

Abstract:

We propose a methodology for the improvement of fabrication technology for the positive electrodes used as components in the lead-acid batteries produced at sc rombat sa . The final goal of our consortium is to improve the current technology used by industrial partner for fabrication of the batteries to be used for start-and-stop automobiles (i.e . To satisfy the j240 – sae and en 50342-6 quality tests) . The proposed approach is designed for the optimization of the scientific and technological steps involved in the fabrication of positive electrodes . It integrates the fundamental knowledge obtained from ab initio calculations, synthesis of new chemical compounds, fabrication of new alloys and structural characterization of the materials used to fabricate the electrode, at both nanoscopic and mesoscopic scale . The key element for the integration of all these activities is the fabrication and characterization of functional prototypes by the industrial partner.

The main problem to be solved is to control the corrosion of the positive electrode during the charge-discharge cycles, imposed by the requests of the start-and-stop technology . The solutions proposed by our consortium are: (i) fabrication of new alloys to be used for the production of the metallic grid that support for the active mass of the electrode (ii) improving the fabrication technology of the metallic grid (iii) improving the electrochemical properties of the active mass by new fabrication technology and by the use of new additives to the active mass. We note here that for the negative electrode as well as for the electrolyte the standard products fabricated by sc rombat sa will be used . The project’s goal will be achieved by using a feed-back loop: the design of materials and the fabrication steps involved by each prototype will be refined by successive fabrication of the prototypes that will gradually incorporate the information produced by each partner . At each step of our methodology the full characterization of the electrochemical and structural properties of the materials and prototypes already fabricated will be used as starting point for further refinement of the fabrication technology . A continuous exchange of data between the research Institutes and the industrial partner is foreseen for the whole duration of the project . This will allow us to tune the results obtained in the laboratory with those produced in industrial conditions . At project’s term we will discuss the technological steps needed for the implementation of the results by using the infrastructure available at sc rombat sa.

NEW ORGANOMETALLIC COMPOUNDS OF HEAVY GROUP 15 METALS (ANTIMONY, BISMUTH) – POTENTIAL USE IN CATALYSIS Call name: Exploratory Research Projects - PCE-2011 call
PN-II-ID-PCE-2011-3-0933 2012 - 2016

Role in this project:

Coordinating institution: UNIVERSITATEA BABES-BOLYAI

Project partners: UNIVERSITATEA BABES-BOLYAI (RO)

Affiliation: UNIVERSITATEA BABES-BOLYAI (RO)

Project website: http://www.chem.ubbcluj.ro/~ccsoom/organometallic/id933.html

Abstract:

The organometallic chemistry of antimony and bismuth raised considerably interest due to the important results obtained both in areas of fundamental and applied interest. The aim of the present proposal is to bring new dimensions to a topic (organometallic species stabilized through N→M intramolecular coordination) in which the research team involved in this project already has significant contributions, i.e. investigation of potential uses of such organometallic species.

The proposed research activities will be focused on (i) the design of hypervalent organometallic compounds of the type R2MOH, (R2M)2O, R2MOR´, (RMO)n (M = Sb, Bi; R = one or two pendant arm ligand) and their reaction with CO2 (CO2 fixation); (ii) study of the catalytic activity of such organometallic species for synthesis of polycarbonates and/or cyclic carbonates from CO2 and epoxides (CO2 activation); (iii) study of the reaction of new hypervalent dibismuthanes R2Bi-BiR2 (R = one or two pendant arm ligand) with dioxygen – potential use in selective oxidation of organic substrates; (iv) study of the catalytic activity and the stereoselectivity of new chiral hypervalent organometallic species, R2MOR and [R2M]+Xˉ (M = Sb, Bi) for the Mannich reaction; (v) design of transition metal complexes of new chiral organoantimony species and study of the catalytic activity for metal-catalyzed cross-coupling reactions.

DESIGN OF ORGANIC SPACERS FOR CONSTRUCTING METAL-ORGANIC FRAMEWORKS (MOFs) – TOWARDS A BETTER CONTROL OF THE POROUS ARCHITECTURE AND ACTIVE CATALYTIC SITES Call name: Complex Exploratory Research Projects - PCCE-2011 call
PN-II-ID-PCCE-2011-2-0050 2012 - 2016

Role in this project:

Coordinating institution: University of Bucharest

Project partners: University of Bucharest (RO); University of Bucharest (RO); Babes Bolyai University (RO); Babes Bolyai University (RO)

Affiliation: Babes Bolyai University (RO)

Project website: http://www.chimie.unibuc.ro/cercetare/anorganica/PCCE_M%20Andruh.pdf

Abstract:

The project aims to obtain a new generation of metal-organic frameworks (MOFs) using novel families of made-by-design spacers (Cyclophane and cyclophane-like spacers with pre-formed cavities; C3-symmetry cryptand-based ligands; Tetrahedral synthons; Organometallic spacers featuring robust metal-carbon bonds, e. g. Organometallic halides, with appropriate organic groups attached to the metal centre to provide stability of the organometallic unit and/or potential to develop 3D architectures. The efforts will be concentrated towards compounds with the metal in lower oxidation state bearing a lone pair of electrons and thus higher reactivity). The construction of MOFs using organometallic tectons is a field largely unexplored. A special emphasis will be given to the post-synthesis processing of the MOFs (removal of solvent and weakly coordinated ligands; functionalization of selected MOFs by nanoconfinement with metal nanoparticles and functionalization for generation of acidic and basic sites). The sorption of various gases (H2, CO2, C2H2, etc.) as well the catalytic properties of the newly synthesized MOFs will be investigated. Enantioselective organic reactions catalyzed by chiral MOFs will be studied as well. In this scope MOFs functionalized with acid and base functions will be investigated in the asymmetric aldol reaction between representative ketones with various aromatic aldehydes under solvent-free conditions. The luminescence properties of some MOFs as well as the influence of the host molecules on the luminescence (especially for those containing lanthanide cations) will be investigated. The ability of the new MOFs for decontamination processes will be tested - more specifically, MOFs will be used as adsorbents for the molecules resulted from the degradation of pharmaceutical compounds via either liquid phase catalytic oxidation or plasma.

FILE DESCRIPTION	DOCUMENT
List of research grants as project coordinator	Download (439.78 kb) 09/04/2017
List of research grants as partner team leader	Download (418.33 kb) 09/04/2017
List of research grants as project coordinator or partner team leader
Significant R&D projects for enterprises, as project manager
R&D activities in enterprises
Peer-review activity for international programs/projects