Joop Schoonman - Academia.edu (original) (raw)
Papers by Joop Schoonman
Solid State Ionics, 1999
By combining structural data with electrical data of nano-structured Li-doped BPO4 the relation b... more By combining structural data with electrical data of nano-structured Li-doped BPO4 the relation between crystal structure and Li+-ion conductivity is derived. A maximum ionic conductivity is found by changing the Li-doping level and is related to the structural changes. Previously, two possible defect models for Li-doped BPO4 were derived from structural data, however the maximum conductivity could not be explained by these defect models. From preliminary Rietveld refined X-ray diffraction data this maximum can be attributed to a change in the a- and c-axes and the related tunnel size for Li+ ions. Another possible explanation for the conductivity maximum is the role of the particle size which depends on the Li-doping level.
Bookmarks Related papers MentionsView impact
![Research paper thumbnail of Li mobility in the battery cathode material Li x [ Mn 1.96 Li 0.04 ] O 4 studied by muon-spin relaxation](https://attachments.academia-assets.com/44003513/thumbnails/1.jpg)
](Physical Review B, 2000
Bookmarks Related papers MentionsView impact
CAS 2005 Proceedings. 2005 International Semiconductor Conference, 2005., 2005
The aim of this paper is to investigate the stability of the tungsten trioxide thin films in diff... more The aim of this paper is to investigate the stability of the tungsten trioxide thin films in different conditions. Tungsten oxide (WO 3) films are prepared by means of the spray pyrolysis deposition (SPD) method using W(OC2H5)2 ethanol. The films were investigated from the morphologic (SEM), crystalline (XRD) and conductive point of view. The resulting films are conductive, crystalline and
Bookmarks Related papers MentionsView impact
Solid State Ionics, 2002
New high-voltage cathode materials for lithium and Li-ion batteries, with the general formula LiM... more New high-voltage cathode materials for lithium and Li-ion batteries, with the general formula LiMgδNi0.5−δMn1.5O4 (δ=0.00, 0.05 and 0.10), have been synthesized and characterized. The crystal structure of these cubic spinel materials has been refined with space group P4332 with the following site occupation: Li+ on 8c, Mg2+ on 4b, Ni2+ on 4b/12d, Mn4+ on 12d/4b and O2− on 24e and
Bookmarks Related papers MentionsView impact
Solid State Ionics, 1992
Bookmarks Related papers MentionsView impact
NATO Science for Peace and Security Series C: Environmental Security, 2009
Nernst-type chemical gas sensors comprise a reference electrode, a sensing electrode, and a funct... more Nernst-type chemical gas sensors comprise a reference electrode, a sensing electrode, and a functional solid electrolyte, which determines the high selectivity of this type of sensor. Taguchi-type chemical gas sensors have as the active material a mixed ionic-electronic conductor (MIEC) with two metallic electrodes, and this type of sensor exhibits a high sensitivity, but a poor selectivity. In order to
Bookmarks Related papers MentionsView impact
Solid State Ionics, 2002
Bookmarks Related papers MentionsView impact
… for Environment, Health …, 2009
... insulating polymer matrix as electrode has led to impor-tant advances in developing sensor de... more ... insulating polymer matrix as electrode has led to impor-tant advances in developing sensor devices (Wang and Naser, 1995; Ballarin ... Moghaddam, BA, Ganjali, MR, Dinarvand, R., Norouzi, P., Saboury, AA, and Moosavi-Movahedi AA, 2007, Electrochemical behaviour of caffeic ...
Bookmarks Related papers MentionsView impact
Key Engineering Materials, 2006
Bookmarks Related papers MentionsView impact
Key Engineering Materials, 2006
Bookmarks Related papers MentionsView impact
Thin Solid Films, 2007
Bookmarks Related papers MentionsView impact
Key Engineering Materials, 2005
Bookmarks Related papers MentionsView impact
CAS 2005 Proceedings. 2005 International Semiconductor Conference, 2005., 2005
The aim of the paper is to present the research made in order to improve the diode behaviour of C... more The aim of the paper is to present the research made in order to improve the diode behaviour of CuSbS2 absorber films used in solar cells. Films obtained with other solvent than water (ethanol) were tested. This films reveal a small improvement in the quality of the films but after the optimization of the ethanol amount that must be added
Bookmarks Related papers MentionsView impact
2011 IEEE SENSORS Proceedings, 2011
... Aniela Pop1, Florica Manea1, Adriana Remes1, Anamaria Baciu1, Corina Orha2,3, Nicolae Vaszilc... more ... Aniela Pop1, Florica Manea1, Adriana Remes1, Anamaria Baciu1, Corina Orha2,3, Nicolae Vaszilcsin1, Stephen Picken4, ... The electrocatalytic activity towards glycerol detection was examined using several electroanalytical techniques, ie, cyclic voltammetry (CV), linear-sweep ...
Bookmarks Related papers MentionsView impact
Analele Universitatii "Ovidius" Constanta - Seria Chimie, 2014
ABSTRACT The direct conversion of solar energy into hydrogen represents an attractive but challen... more ABSTRACT The direct conversion of solar energy into hydrogen represents an attractive but challenging alternative for photovoltaic solar cells. Several metal oxide semiconductors are able to split water into hydrogen and oxygen upon illumination, but the efficiencies are still quite low. The operating principles of the photo-electrochemical device, the material’s requirements and main bottlenecks will be discussed, and some promising directions for future research will be indicated.
Bookmarks Related papers MentionsView impact
Sensors, 2007
Bookmarks Related papers MentionsView impact
Key Engineering Materials, 2002
Page 1. Key Engineering Materials Vols. 206-213 (2002) pp 123-126 Online available since 2001/Dec... more Page 1. Key Engineering Materials Vols. 206-213 (2002) pp 123-126 Online available since 2001/Dec/15 at www.scientific.net © (2002) Trans Tech Publications, Switzerland doi:10.4028/www.scientific.net/KEM.206-213.123 All rights reserved. ...
Bookmarks Related papers MentionsView impact
Solid State Ionics, 1996
A novel fabrication technique, namely electrostatic spray deposition (ESD), has been developed in... more A novel fabrication technique, namely electrostatic spray deposition (ESD), has been developed in order to prepare thin layers of solid electrolytes and cathode materials for lithium batteries. In this study, the 4-volt cathode material LiCoO2 was chosen, and prepared by spraying alcohol solutions of nitrates and acetates of cobalt. ESD set-ups, with either horizontal or vertical configurations, were used. Depending on the precursor and process deposition conditions, the morphology of the layers can be relatively dense, fractal-like porous, or unique 3-D cross-linked porous structures with a high porosity and a narrow pore size distribution. For low deposition temperatures, LiCoO2 layers are XRD amorphous. Upon annealing, crystallized layers are obtained. The lithium chemical diffusion coefficient of the LiCoO2 layers has been measured with Galvanostatic Intermittent Titration Technique (GITT), values range from 10−14 to 10−12 cm2/s, depending on the lithium content and the annealin...
Bookmarks Related papers MentionsView impact
Thin Solid Films, 2007
Bookmarks Related papers MentionsView impact
Thin Solid Films, 2003
... Marian Nanu Corresponding Author Contact Information , E-mail The Corresponding Author , a , ... more ... Marian Nanu Corresponding Author Contact Information , E-mail The Corresponding Author , a , b , Liesbeth Reijnen a , Ben Meester a , Albert Goossens ... The crystal structure is determined by XRD using a Bruker D8 Advance Diffractometer with a monochromatic Cu Kα source. ...
Bookmarks Related papers MentionsView impact
Solid State Ionics, 1999
By combining structural data with electrical data of nano-structured Li-doped BPO4 the relation b... more By combining structural data with electrical data of nano-structured Li-doped BPO4 the relation between crystal structure and Li+-ion conductivity is derived. A maximum ionic conductivity is found by changing the Li-doping level and is related to the structural changes. Previously, two possible defect models for Li-doped BPO4 were derived from structural data, however the maximum conductivity could not be explained by these defect models. From preliminary Rietveld refined X-ray diffraction data this maximum can be attributed to a change in the a- and c-axes and the related tunnel size for Li+ ions. Another possible explanation for the conductivity maximum is the role of the particle size which depends on the Li-doping level.
Bookmarks Related papers MentionsView impact
Physical Review B, 2000
Bookmarks Related papers MentionsView impact
CAS 2005 Proceedings. 2005 International Semiconductor Conference, 2005., 2005
The aim of this paper is to investigate the stability of the tungsten trioxide thin films in diff... more The aim of this paper is to investigate the stability of the tungsten trioxide thin films in different conditions. Tungsten oxide (WO 3) films are prepared by means of the spray pyrolysis deposition (SPD) method using W(OC2H5)2 ethanol. The films were investigated from the morphologic (SEM), crystalline (XRD) and conductive point of view. The resulting films are conductive, crystalline and
Bookmarks Related papers MentionsView impact
Solid State Ionics, 2002
New high-voltage cathode materials for lithium and Li-ion batteries, with the general formula LiM... more New high-voltage cathode materials for lithium and Li-ion batteries, with the general formula LiMgδNi0.5−δMn1.5O4 (δ=0.00, 0.05 and 0.10), have been synthesized and characterized. The crystal structure of these cubic spinel materials has been refined with space group P4332 with the following site occupation: Li+ on 8c, Mg2+ on 4b, Ni2+ on 4b/12d, Mn4+ on 12d/4b and O2− on 24e and
Bookmarks Related papers MentionsView impact
Solid State Ionics, 1992
Bookmarks Related papers MentionsView impact
NATO Science for Peace and Security Series C: Environmental Security, 2009
Nernst-type chemical gas sensors comprise a reference electrode, a sensing electrode, and a funct... more Nernst-type chemical gas sensors comprise a reference electrode, a sensing electrode, and a functional solid electrolyte, which determines the high selectivity of this type of sensor. Taguchi-type chemical gas sensors have as the active material a mixed ionic-electronic conductor (MIEC) with two metallic electrodes, and this type of sensor exhibits a high sensitivity, but a poor selectivity. In order to
Bookmarks Related papers MentionsView impact
Solid State Ionics, 2002
Bookmarks Related papers MentionsView impact
… for Environment, Health …, 2009
... insulating polymer matrix as electrode has led to impor-tant advances in developing sensor de... more ... insulating polymer matrix as electrode has led to impor-tant advances in developing sensor devices (Wang and Naser, 1995; Ballarin ... Moghaddam, BA, Ganjali, MR, Dinarvand, R., Norouzi, P., Saboury, AA, and Moosavi-Movahedi AA, 2007, Electrochemical behaviour of caffeic ...
Bookmarks Related papers MentionsView impact
Key Engineering Materials, 2006
Bookmarks Related papers MentionsView impact
Key Engineering Materials, 2006
Bookmarks Related papers MentionsView impact
Thin Solid Films, 2007
Bookmarks Related papers MentionsView impact
Key Engineering Materials, 2005
Bookmarks Related papers MentionsView impact
CAS 2005 Proceedings. 2005 International Semiconductor Conference, 2005., 2005
The aim of the paper is to present the research made in order to improve the diode behaviour of C... more The aim of the paper is to present the research made in order to improve the diode behaviour of CuSbS2 absorber films used in solar cells. Films obtained with other solvent than water (ethanol) were tested. This films reveal a small improvement in the quality of the films but after the optimization of the ethanol amount that must be added
Bookmarks Related papers MentionsView impact
2011 IEEE SENSORS Proceedings, 2011
... Aniela Pop1, Florica Manea1, Adriana Remes1, Anamaria Baciu1, Corina Orha2,3, Nicolae Vaszilc... more ... Aniela Pop1, Florica Manea1, Adriana Remes1, Anamaria Baciu1, Corina Orha2,3, Nicolae Vaszilcsin1, Stephen Picken4, ... The electrocatalytic activity towards glycerol detection was examined using several electroanalytical techniques, ie, cyclic voltammetry (CV), linear-sweep ...
Bookmarks Related papers MentionsView impact
Analele Universitatii "Ovidius" Constanta - Seria Chimie, 2014
ABSTRACT The direct conversion of solar energy into hydrogen represents an attractive but challen... more ABSTRACT The direct conversion of solar energy into hydrogen represents an attractive but challenging alternative for photovoltaic solar cells. Several metal oxide semiconductors are able to split water into hydrogen and oxygen upon illumination, but the efficiencies are still quite low. The operating principles of the photo-electrochemical device, the material’s requirements and main bottlenecks will be discussed, and some promising directions for future research will be indicated.
Bookmarks Related papers MentionsView impact
Sensors, 2007
Bookmarks Related papers MentionsView impact
Key Engineering Materials, 2002
Page 1. Key Engineering Materials Vols. 206-213 (2002) pp 123-126 Online available since 2001/Dec... more Page 1. Key Engineering Materials Vols. 206-213 (2002) pp 123-126 Online available since 2001/Dec/15 at www.scientific.net © (2002) Trans Tech Publications, Switzerland doi:10.4028/www.scientific.net/KEM.206-213.123 All rights reserved. ...
Bookmarks Related papers MentionsView impact
Solid State Ionics, 1996
A novel fabrication technique, namely electrostatic spray deposition (ESD), has been developed in... more A novel fabrication technique, namely electrostatic spray deposition (ESD), has been developed in order to prepare thin layers of solid electrolytes and cathode materials for lithium batteries. In this study, the 4-volt cathode material LiCoO2 was chosen, and prepared by spraying alcohol solutions of nitrates and acetates of cobalt. ESD set-ups, with either horizontal or vertical configurations, were used. Depending on the precursor and process deposition conditions, the morphology of the layers can be relatively dense, fractal-like porous, or unique 3-D cross-linked porous structures with a high porosity and a narrow pore size distribution. For low deposition temperatures, LiCoO2 layers are XRD amorphous. Upon annealing, crystallized layers are obtained. The lithium chemical diffusion coefficient of the LiCoO2 layers has been measured with Galvanostatic Intermittent Titration Technique (GITT), values range from 10−14 to 10−12 cm2/s, depending on the lithium content and the annealin...
Bookmarks Related papers MentionsView impact
Thin Solid Films, 2007
Bookmarks Related papers MentionsView impact
Thin Solid Films, 2003
... Marian Nanu Corresponding Author Contact Information , E-mail The Corresponding Author , a , ... more ... Marian Nanu Corresponding Author Contact Information , E-mail The Corresponding Author , a , b , Liesbeth Reijnen a , Ben Meester a , Albert Goossens ... The crystal structure is determined by XRD using a Bruker D8 Advance Diffractometer with a monochromatic Cu Kα source. ...
Bookmarks Related papers MentionsView impact