2 resultados para ex post facto study
em AMS Tesi di Laurea - Alm@DL - Università di Bologna
Filtro por publicador
- Aberdeen University (1)
- Academic Archive On-line (Karlstad University; Sweden) (1)
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- AMS Tesi di Dottorato - Alm@DL - Università di Bologna (9)
- AMS Tesi di Laurea - Alm@DL - Università di Bologna (2)
- Andina Digital - Repositorio UASB-Digital - Universidade Andina Simón Bolívar (2)
- Aquatic Commons (5)
- Archive of European Integration (18)
- Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (8)
- Aston University Research Archive (12)
- Biblioteca de Teses e Dissertações da USP (1)
- Biblioteca Digital | Sistema Integrado de Documentación | UNCuyo - UNCUYO. UNIVERSIDAD NACIONAL DE CUYO. (2)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (6)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (1)
- Biblioteca Digital de la Universidad Católica Argentina (1)
- Biblioteca Digital de Teses e Dissertações Eletrônicas da UERJ (4)
- Biblioteca Valenciana Digital - Ministerio de Educación, Cultura y Deporte - Valencia - Espanha (1)
- BORIS: Bern Open Repository and Information System - Berna - Suiça (34)
- Brock University, Canada (2)
- CaltechTHESIS (3)
- CentAUR: Central Archive University of Reading - UK (22)
- Central European University - Research Support Scheme (2)
- Chinese Academy of Sciences Institutional Repositories Grid Portal (5)
- Clark Digital Commons--knowledge; creativity; research; and innovation of Clark University (1)
- Cochin University of Science & Technology (CUSAT), India (3)
- Coffee Science - Universidade Federal de Lavras (1)
- Collection Of Biostatistics Research Archive (1)
- Comissão Econômica para a América Latina e o Caribe (CEPAL) (34)
- CORA - Cork Open Research Archive - University College Cork - Ireland (2)
- Corvinus Research Archive - The institutional repository for the Corvinus University of Budapest (9)
- Dalarna University College Electronic Archive (5)
- Deakin Research Online - Australia (49)
- DI-fusion - The institutional repository of Université Libre de Bruxelles (5)
- Digital Commons @ DU | University of Denver Research (1)
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- DigitalCommons@The Texas Medical Center (3)
- Digitale Sammlungen - Goethe-Universität Frankfurt am Main (1)
- DRUM (Digital Repository at the University of Maryland) (3)
- Duke University (3)
- Ecology and Society (1)
- eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (6)
- FAUBA DIGITAL: Repositorio institucional científico y académico de la Facultad de Agronomia de la Universidad de Buenos Aires (2)
- FUNDAJ - Fundação Joaquim Nabuco (1)
- Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (1)
- Glasgow Theses Service (4)
- Greenwich Academic Literature Archive - UK (1)
- Helda - Digital Repository of University of Helsinki (17)
- Illinois Digital Environment for Access to Learning and Scholarship Repository (1)
- Indian Institute of Science - Bangalore - Índia (8)
- Instituto Politécnico de Bragança (2)
- Instituto Politécnico do Porto, Portugal (3)
- Instituto Superior de Psicologia Aplicada - Lisboa (1)
- Lume - Repositório Digital da Universidade Federal do Rio Grande do Sul (7)
- Memoria Académica - FaHCE, UNLP - Argentina (9)
- Ministerio de Cultura, Spain (99)
- National Center for Biotechnology Information - NCBI (1)
- Plymouth Marine Science Electronic Archive (PlyMSEA) (3)
- Portal de Revistas Científicas Complutenses - Espanha (1)
- Publishing Network for Geoscientific & Environmental Data (1)
- QSpace: Queen's University - Canada (1)
- QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (23)
- Queensland University of Technology - ePrints Archive (209)
- RCAAP - Repositório Científico de Acesso Aberto de Portugal (3)
- RDBU - Repositório Digital da Biblioteca da Unisinos (1)
- REPOSITÓRIO ABERTO do Instituto Superior Miguel Torga - Portugal (1)
- Repositorio Académico de la Universidad Nacional de Costa Rica (3)
- Repositório Alice (Acesso Livre à Informação Científica da Embrapa / Repository Open Access to Scientific Information from Embrapa) (3)
- Repositório Científico da Universidade de Évora - Portugal (1)
- Repositorio de la Ciencia y Cultura de El Salvador REDICCES (1)
- Repositorio de la Universidad del Pacífico - PERU (1)
- Repositório digital da Fundação Getúlio Vargas - FGV (32)
- Repositório Digital da Universidade Municipal de São Caetano do Sul - USCS (2)
- Repositório do Centro Hospitalar de Lisboa Central, EPE - Centro Hospitalar de Lisboa Central, EPE, Portugal (1)
- Repositório Institucional da Universidade de Aveiro - Portugal (1)
- Repositório Institucional da Universidade Federal do Rio Grande - FURG (1)
- Repositório Institucional da Universidade Federal do Rio Grande do Norte (1)
- Repositorio Institucional de la Universidad de El Salvador (1)
- Repositorio Institucional de la Universidad Nacional Agraria (1)
- Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (43)
- Repositorio Institucional Universidad Católica de Colombia (1)
- Research Open Access Repository of the University of East London. (1)
- Royal College of Art Research Repository - Uninet Kingdom (1)
- RUN (Repositório da Universidade Nova de Lisboa) - FCT (Faculdade de Cienecias e Technologia), Universidade Nova de Lisboa (UNL), Portugal (1)
- SAPIENTIA - Universidade do Algarve - Portugal (1)
- Savoirs UdeS : plateforme de diffusion de la production intellectuelle de l’Université de Sherbrooke - Canada (1)
- Scielo España (2)
- Universidad de Alicante (2)
- Universidad del Rosario, Colombia (15)
- Universidad Politécnica de Madrid (11)
- Universidade Complutense de Madrid (2)
- Universidade de Lisboa - Repositório Aberto (2)
- Universidade Federal do Pará (1)
- Universidade Federal do Rio Grande do Norte (UFRN) (6)
- Universidade Técnica de Lisboa (1)
- Universitat de Girona, Spain (2)
- Universitätsbibliothek Kassel, Universität Kassel, Germany (5)
- Université de Lausanne, Switzerland (4)
- Université de Montréal (2)
- Université de Montréal, Canada (10)
- University of Connecticut - USA (1)
- University of Michigan (21)
- University of Queensland eSpace - Australia (12)
- University of Southampton, United Kingdom (1)
- University of Washington (4)
- WestminsterResearch - UK (3)
Resumo:
The Li-rich layered transition metal oxides (LLOs) Li2MnO3-LiMO2 (M=Mn, Co, Ni, etc.) have drawn considerable attention as cathode materials for rechargeable lithium batteries. They generate large reversible capacities but the fundamental reaction mechanism and structural perturbations during cycling remain controversial. In the present thesis, ex situ X-ray absorption spectroscopy (XAS) measurements were performed on Li[Li0.2Mn0.56Ni0.16Co0.08]O2 at different stage of charge during electrochemical oxidation/reduction. K-edge spectra of Co, Mn and Ni were recorded through a voltage range of 3.7-4.8V vs. Li/Li+, which consist of X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS). Oxidation states during initial charge were discussed based on values from literature as well as XANES analysis. Information about bond distance, coordination number as well as corresponding Debye-Waller factor were extracted from Gnxas analysis of raw data in the EXAFS region. The possibility of oxygen participation in the initial charge was discussed. Co and Ni prove to take part in the oxidation/reduction process while Mn remain in the tetravalent state. The cathode material appears to retain good structural short-range order during charge-discharge. A resemblance of the pristine sample and sample 4 was discovered which was firstly reported for similar compounds.