Hybrid materials based on carbon nanotubes, heteropolyacids and conducting polymers for applications in energy storage field

Project Director: Dr. Mihaela BAIBARAC

Project Duration 3 years  ( 01.10.2008- 01.11.2011 )

Contractual Authority: National Center of Program Management ( NCPM )



The project develops research regarding : i) the fabrication of new materials based on  carbon nanotubes (CNs), heteropolyacids (H) with Keggin structure (Angstrom scale anionic clusters) and conducting polymers (PC), ii) their characterization by non-destructive optical methods and electrochemical techniques, iii) the use of these materials in demonstrative applications in the energy storage field and as active material in supercapacitors. The project implies activities of :
a) evaluation of the physical and chemical interactions that take place between the components forming the composites materials by a1) measurement of UV-VIS-NIR absorption and photoluminescence spectroscopy, a2) vibrational spectroscopy (volume and surface Raman scattering and FTIR spectroscopy)  and
b) electrochemical characterization of the new composite materials by b1) electrochemical impedance spectroscopy studies concerning the interaction of CNs with heteropolyacids of the type phosphomolybdic acid, silicotungstic acid and phosphotungstic acid  and the influence of synthesis mixtures  and temperature on the conducting properties of the hybrid material of the type CNs/heteropolyacids/conducting polymers and b2) charge-discharge tests for evaluation of supercapacitors based on carbon nanotubes, heteropolyacids and conducting polymers. CNs of the type single-walled carbon nanotubes (SWNTs), double-wall carbon nanotubes (DWNTs) and multi-wall carbon nanotubes (MWNTs) and conducting polymers as poly 5-amino-1-naphtole, polypyrrole and polydiphenylamine are studied in this project.


The main objectives are:
i) elaboration of new methods for the purification of carbon nanotubes in the presence of acid medium and neutral surfactants;
ii) evidencing by vibrational spectroscopic studies of the functionalization of CNs with heteropolyacids with Keggin structure;
iii) developing of chemical and electrochemical synthesis methods in order to obtain composites based on carbon nanotubes functionalized both with heteropolyacids and conducting polymers and their optical characterization;
iv) determining of main working parameters of simmetrical supercapacitors based on electrodes having as active materials conducting polymers and heteropolyacids functionalized carbon nanotubes

Coordonation Institution: National Institute of Materials Physics, Bucharest         
INCDFM   http://www.infim.ro
Dr. Lucian Pintilie
General Director
Address: Atomistilor str. 105 bis,
PO Box MG. 7
Magurele Bucharest Romania
Email: pintilie@infim.ro
Phone: +40213690185
Fax: +40213690177

INCDFM,     National Institute of Materials Physics, Bucharest
UPB ,             University Politehnica of Bucharest
ICF                 Institute of Physical Chemistry “Ilie Murgulescu” Romanian Academy

National Institute of Materials Physics, Bucharest
INCDFM   http://www.infim.ro
Project Director:  Dr.Mihaela Baibarac  <barac@infim.ro>

105 bis Atomistilor Street, Bucharest-Magurele, Romania
Phone : + 4021-369 0170 / 112
Fax   :   + 4021-369 0177

University ”Polytehnica” of Bucharest
UPB   http://www.upb.ro/
Responsible: Prof. Dr. Viorel Branzoi <iv_branzoi@chim.upb.ro>

Splaiul Independentei 313, 060042-Bucharest, ROMANIA
Phone:  +4021-402 3977
Fax:      +4021-315 4193

   Institute of Physical Chemistry “Ilie Murgulescu” Romanian Academy
ICF   http://www.icf.ro
Responsable: Dr. Florina Branzoi  <fbranzoi@chimfiz.icf.ro>

Splaiul Independentei 202 Sector:6, Bucharest, Romania
Phone : + 4021-3167912/16
Fax   :   + 4021-3121147

Published Papers

  1. M. Husanu, M. Baibarac, I. Baltog
    "Non-covalent functionalization of carbon nanotubes: Experimental evidence for isolated and bundled tubes"
    Physica E-Low-dimensional Systems and Nanostructures, 41 (1), 66-69, 2008
  2. M. Baibarac, I. Baltog, S. Lefrant
    "Raman spectroscopic evidences for the interface interactions in poly(bithiophene)/single-walled carbon nanotubes composites"
    Carbon, 47 (5), 1389-1398, 2009
  3. V. Branzoi, F. Branzoi, L. Pilan
    "Characterization of electrodeposited polymeric and composite modified electrodes on cobalt based alloy"
    Materials Chemistry and Physics, 118 (1), 197-202, 2009
  4. M. Baibarac, I. Baltog, S. Lefrant
    "Composites Based on Conducting Polymers and Carbon Nanotubes"
    chapter 5 in Nanostructured Conductive Polymers, Editor Ali Eftekhari, A John Wiley and Sons, Ltd, 209-260, 2010
  5. M. Baibarac, I. Baltog, S. Lefrant
    "Recent progress in synthesis, vibrational characterization and applications trend of conjugated polymers/carbon nanotubes composites"
    Current Organic Chemistry,15 (8),1160-1196, 2011
  6. S. Lefrant, J.P. Buisson, J.Y. Mevellec, M. Baibarac, I. Baltog
    "Non-linear and resonance effects in carbon nanotube structures"
    Optical Materials, 33, 1410-1414, 2011
  7. I. Baltog, M. Baibarac, I. Smaranda, S. Lefrant
    "Abnormal anti-Stokes Raman emission as a coherent anti-Stokes Raman scattering-like process in disordered media"
    Journal of Physics B-Atomic Molecular and Optical Physics, 44 (9), 095401, 2011
  8. M. Baibarac, I. Baltog, S. Lefrant, P. Gomez-Romero
    "Polydiphenylamine/carbon nanotube composites for applications in rechargeable lithium batteries"
    Materials Science and Engineering B-Advanced Functional Solid state Materials, 176, 110-120, 2011
  9. M. Baibarac, I. Baltog, I. Smaranda, M. Scocioreanu, et al.
    "Spectroelectrochemical properties of single walled carbon nanotubes functionalized with polydiphenilamine doped with phorphormolibdic acid heteropolyanions"
    Current Organic Chemistry, submitted, 2011

Conferences & Workshops

M. Baibarac, I. Baltog, S. Lefrant, P. Gomez-Romero, Optical and electrochimical properties of the composites based on poly diphenylamine and single walled carbon nanotubes, International Conference on carbon nanostructured materials, 4-8 October 2009, Greece

V. Branzoi, F. Branzoi and L. Pilan, Nanoporous Composites Based on Carbon Nanotubes and Conducting Polymers for Obtaining of Modified Electrodes, 218 ECS Meeting, The Electrochemical Society, Meeting, 10-15 Oct, 2010, Las Vegas, Nevada.


      IOptical and electrochemical properties of carbon nanotubes functionalized with heteropolyacids28.02.2009
     IISynthesis and optical characterization of conducting polymers (poly 5-amino-1-naphtole, polypyrrole, polydiphenylamine) used as host matrix for the carbon nanotubes functionalized with heteropolyacids.15.12.2009
 IIIChemical and electrochemical synthesis and optical characterization of composites based on carbon nanotubes stabilized with heteropolyacids and conducting polymers.17.12.2010
IVEvaluation of the performance of the symmetric electrochemical capacitors, using as active materials for electrodes composites based on carbon nanotubes functionalized with heteropolyanions and conducting polymers.01.10.2011



INCDFMChemistry laboratory endowed with: recess, drying stove, analytic balance-Explorer Proultrasonication bath Elma S120 Elmasonic, mechanical stirring apparatus IKA&RTC basic, Sigma 2-16 ultra centrifugetubular oven Protherm Alser Tecknik series, FALC thermostat,  potentiostat/galvanostat Voltalab 80 Radiometer Analyticali) FT Raman spectrometer RFS-100 Bruker;
ii) spectrometer  Horiba Jobin Yvon Fluorolog, model FL-3.22;
iii) Raman experimental set-up operating with excitation light comming from a Argon and Krypton lasers;
iv) Photoluminescence experimental set-up operating under pulse excitation;
v) Photoconductivity experimental set-up with Vibrating Reed electrometer as detector;
vi) FTIR spectrometer model Bruker IFS/Vertex 80;
vii) absorption spectrometer UV-VIS-NIR, Lamda 90, Perkin Elmer;


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