Shop : Details
Shop
Details
Albrecht Schwinger
Die Synthese des Verbundwerkstoffes Lithiumeisenphosphat-Kohlenstoff durch Ultraschallsprühpyrolyse
This thesis presents the results of the investigation of the synthesis of the compound material Lithium-iron-phosphate-carbon (LiFePO4/C) as a core shell material in the ultrasonic spray pyrolysis (USP).
LiFePO4/C is a promising cathode material for Li-ion-batteries, because of its thermochemical stability, high energy density, cell voltage and cycle stability. The conductivity of LiFePO4/C is with 10-9 S cm-1 a restrictive parameter. It is possible to lift it up to 10-3 S cm-1 with the help of carbon.
The motivation of this thesis is to synthesize core shell particles with LiFePO4 in the core and C in the shell in one process step in the USP. Ultrasound forms the precursor to a spray. After this the spray transforms to LiFePO4/C in a wall heated reactor tube. The purity of the product powder is proved with the help of X-ray-diffraction (XRD).The Differential Thermal Analysis and the thermogravimetry (DTA/TG) makes the steps of the pyrolysis process visible. Furthermore, investigations to the thermal transfer and the residence time are performed. The analysis of the droplet size and the particle size are investigated with laser diffraction. The morphology is investigated with TEM and EDX. These results answers the question of the influences of the different parameters contributing to the core shell synthesis.
A successful synthesis of defined core shell particles is done by employing optimized process parameters. For the evaluation of the core shell quality a CS-factor is developed.
Li(NiMnCo)0,33O2 is synthesized to show the applicability of the USP for different cathode materials.
LiFePO4/C is a promising cathode material for Li-ion-batteries, because of its thermochemical stability, high energy density, cell voltage and cycle stability. The conductivity of LiFePO4/C is with 10-9 S cm-1 a restrictive parameter. It is possible to lift it up to 10-3 S cm-1 with the help of carbon.
The motivation of this thesis is to synthesize core shell particles with LiFePO4 in the core and C in the shell in one process step in the USP. Ultrasound forms the precursor to a spray. After this the spray transforms to LiFePO4/C in a wall heated reactor tube. The purity of the product powder is proved with the help of X-ray-diffraction (XRD).The Differential Thermal Analysis and the thermogravimetry (DTA/TG) makes the steps of the pyrolysis process visible. Furthermore, investigations to the thermal transfer and the residence time are performed. The analysis of the droplet size and the particle size are investigated with laser diffraction. The morphology is investigated with TEM and EDX. These results answers the question of the influences of the different parameters contributing to the core shell synthesis.
A successful synthesis of defined core shell particles is done by employing optimized process parameters. For the evaluation of the core shell quality a CS-factor is developed.
Li(NiMnCo)0,33O2 is synthesized to show the applicability of the USP for different cathode materials.
Schlagwörter: Sprühpyrolyse; Core-Shell; Lithiumeisenphosphat
Verfügbare Online-Dokumente zu diesem Titel
DOI 10.2370/9783844043228
Sie benötigen den Adobe Reader, um diese Dateien ansehen zu können. Hier erhalten Sie eine kleine Hilfe und Informationen, zum Download der PDF-Dateien.
Bitte beachten Sie, dass die Online-Dokumente nicht ausdruckbar und nicht editierbar sind.
Bitte beachten Sie auch weitere Informationen unter: Hilfe und Informationen.
Bitte beachten Sie auch weitere Informationen unter: Hilfe und Informationen.
| Dokument |  | Gesamtdokument | ||
| Dateiart |  | |||
| Kosten |  | 36,60 € | ||
| Aktion |  | Zahlungspflichtig kaufen und anzeigen der Datei | ||
| Aktion |  | Zahlungspflichtig kaufen und download der Datei | ||
| Dokument |  | Inhaltsverzeichnis | ||
| Dateiart | | |||
| Kosten |  | frei | ||
| Aktion |  | Anzeigen der Datei | ||
| Aktion |  | Download der Datei | ||
Benutzereinstellungen für registrierte Online-Kunden (Online-Dokumente)
Sie können hier Ihre Adressdaten ändern sowie bereits georderte Dokumente erneut aufrufen.
Benutzer
Nicht angemeldet
Export bibliographischer Daten
Shaker Verlag GmbHAm Langen Graben 15a52353 Düren
Mo. - Do. 8:00 Uhr bis 16:00 UhrFr. 8:00 Uhr bis 15:00 Uhr
Kontaktieren Sie uns. Wir helfen Ihnen gerne weiter.
