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Table of contents
Table of content
Acknowledgement
Abstract
Povzetek
Résumé
Table of content
1 Introduction
1.1 Batteries for electrochemical energy storage
1.2 Lithium- and sodium ion batteries
1.2.1 Lithium ion batteries
1.2.2 Sodium ion batteries
1.3 Cathode materials for lithium- and sodium –ion batteries
1.3.1 Lithium- and sodium transition metal oxides
1.3.2 Polyanionic cathode materials and the inductive effect
1.3.3 Conversion type cathode materials
1.4 Borate based cathode materials for lithium- and sodium-ion batteries
1.4.1 Why borate based materials?
1.4.2 Lithium transition metal borates
1.4.3 Borophosphates
1.5 Motivation and aim of the thesis
2 Search for new pyroborate B2O5 based compounds
2.1 A few synthesis considerations
2.2 Ceramic synthesis
2.3 Low temperature synthesis
3 Structural and electrochemical properties of a lithium copper pyroborate Li6CuB4O10
3.1 Structure and polymorphism
3.2 Electrochemical characterization
3.2.1 Activity versus lithium
3.2.2 Ionic conductivity
3.3 Conclusion
4 Synthesis, structural and electrochemical properties of sodium transition metal pentaborates Na3MB5O10 (M = Fe, Co)
4.1 Synthesis and structure
4.2 Electrochemical characterization
4.2.1 Activity versus sodium
4.2.2 Ionic conductivity
4.3 Conclusion
5 Study of the electrochemical driven reaction mechanism of bismuth oxyborate Bi4B2O9 versus lithium
5.1 Synthesis and structure
5.2 Electrochemical characterization
5.3 Conclusion
6 General conclusion
7 Annexes
7.1 Electrochemical characterization
7.1.1 Galvanostatic techniques
7.1.2 Potentiostatic techniques
7.1.3 Electrochemical impedance spectroscopy
7.1.4 Direct current polarization measurements
7.2 Structural characterization
7.2.1 Laboratory XRD
7.2.2 Synchrotron XRD
7.3 Other physical characterization
7.3.1 Thermal analysis
7.3.2 EPR spectroscopy
7.3.3 Mössbauer spectroscopy
7.3.4 Scanning- and transmission electron microscopy
7.3.5 Density functional theory calculations
7.3.6 Bond valence energy landscape calculations
8 References
