Now showing items 1-10 of 70
Experimentelle Untersuchungen von Alterungsmechanismen in großformatigen Lithium-Ionen Zellen
(Universität Ulm, 2017-07-19)
Für die Optimierung von Lithium-Ionen Zellen ist ein tiefes Verständnis der elektrochemischen Vorgänge und Wechselwirkungen aller Komponenten notwendig. Im Rahmen der vorliegenden Arbeit wurden experimentelle ...
Characterization and properties of titanium dioxide based materials as PEMFC cathode supports and catalysts
(Universität Ulm, 2017-02-02)
The potential of alternative catalysts for application in the polymer electrolyte membrane (PEM) fuel cell relevant cathode reaction, the oxygen reduction reaction (ORR), was investigated using TiO2 based materials. Herein, ...
Characterization of nickelate-based short-period superlattices using transmission electron microscopy
(Universität Ulm, 2017-12-12)
RMO3 perovskites (R = rare-earth metal, M = transition metal) represent a board spectrum of intriguing functionalities such as metal-insulator transitions, multiferroicity, colossal magnetoresistance and superconductivity ...
Adsorption behavior and structure formation of ionic liquids on single crystalline surfaces
(Universität Ulm, 2017-02-10)
In the present thesis the interaction of the ionic liquids [BMP][TFSA], [OMIM][TFSA] and [EMIM][TFSA] on the single crystalline surfaces Au(111), Ag(111), Cu(111) and TiO2(110) was investigated with STM and XPS under UHV ...
Measurement of reduced dipole matrix elements in 40Ca+ and construction of a scalable light-ion interface
(Universität Ulm, 2017-01-10)
In the first part of this thesis, a method for determining transition dipole matrix elements is introduced. It combines measuring absorptive and dispersive atom-light interactions off-resonant to the transition in question ...
Predicting angiosperm tree mortality based on embolism resistance, cambium vitality and intervessel pit membrane thickness
(Universität Ulm, 2017-02-28)
Drought is one of the most challenging environmental factors inducing world-wide forest die-back and tree mortality. In this thesis, xylem embolism resistance (P50, i.e., the xylem water potential at 50% loss of hydraulic ...
Development of all solid state fluoride ion batteries based on thin film electrolytes
(Universität Ulm, 2017-03-14)
For current solid state fluoride ion battery, a critical problem is that the practical capacity is considerably below that of the theoretical value and fades rapidly during the further cycles. One reason for this problem ...
Mimicking the active centers of iron sulfur proteins via reactions of iron sulfur cations in a linear octopole ion trap
(Universität Ulm, 2017-06-13)
Metalloproteins are ’macromolecular machines’ and cover a vast amount of important functions which are essential for all living organisms. Proteins are able to transduce signals, replicate DNA, or catalyze chemical reactions. ...
Corrosion resistant cathode catalyst support materials for polymer electrolyte membrane fuel cell
(Universität Ulm, 2017-08-08)
Polymer Electrolyte Membrane Fuel Cells (PEMFC) having high power density and low degradation are considered a viable option for future emission free mobility. In order to minimize the noble metal demand, platinum ...
Fabrication and sensing development of electroactive polymers
(Universität Ulm, 2017-08-15)
Ionic polymer-metal composites (IPMCs) are one of the most interesting types of “smart materials". The “smart” denomination for these materials comes from the active deformation response of them to an electric field. Ionic ...