Electrochemistry and spectroscopy of energy conversion and polynuclear aromatic materials
Notice bibliographique
Résumé
The field of materials chemistry is becoming increasingly important in many technological disciplines, including batteries, fuel cells, hydrogen storage materials, and application of poly-nuclear aromatic compounds in solar cells, color copiers, sensors, and catalysis. This multidisciplinary research work focuses on the development, understanding, and characterization of novel materials for advanced lithium batteries and a unique series of polyaromatic compounds for application in solar cells and color copiers. A general overview of materials and techniques used in this work is presented, including the electrochemistry, spectroscopy, thermal analysis, and x-ray diffraction. A unique electrochemical procedure based on carbon paste microelectrode was applied to study the electrochemistry of novel poly-nuclear aromatic compounds. X-ray diffraction and vibrational spectroscopy are also used to gain further information about their molecular organization in solid-state. Conductivity of a novel electrolyte based on a multi-blend of organic carbonate solvents, has been studied over a wide range of temperatures (-40 to 70°C). An optimized electrolyte for an advanced lithium battery based on ternary solvent blend of linear and cyclic organic carbonates has been developed. The nature of ion-association and ion-solvent interactions in complex electrolytes are studied using infrared spectroscopy. We have found a strong preferred solvation of lithium ion in electrolyte containing multi-blend solvent molecules. The advanced lithium battery uses intercalation compounds with layered structure such as LiCoO2 cathode, and lithiated graphite, (LiC 6), anode. In this work, we have studied the reactivity of Li-C anode materials in contact with organic carbonate-based electrolyte, and have investigated the nature of the decomposition products formed on the electrode surface. A significant reactivity between the LiC6 and organic electrolytes is observed, and is a major safety concern. A unique, yet simple procedure was developed for spectroscopy and X-ray diffraction of air sensitive materials. The electrochemical properties of poly-aromatic molecules are studied using a novel carbon-paste micro-electrode technique. The electrochemical studies indicate that the charge transport in this class of compounds is diffusion controlled, and the radical anions that are formed during reduction of polyaromatics are stable enough to be observed during the oxidation to the neutral state. IR spectra of polyaromatic molecules, in the far- and mid-IR have been obtained. Thermal analysis has shown that the PTCDA, and its derivatives used in this work, are thermally stable up to 400°C, and they are suitable for application in solar cells and color copiers.Dept. of Chemistry and Biochemistry. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2003 .N38. Source: Dissertation Abstracts International, Volume: 64-10, Section: B, page: 4962. Adviser: Ricardo Aroca. Thesis (Ph.D.)--University of Windsor (Canada), 2003.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,002 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».