publication . Doctoral thesis . 2017

Der Einfluss verschiedener Parameter auf die Entladekapazität und Zyklenverhalten von Li/S-Batterien

Eberle, Anna-Marietta;
Open Access English
  • Published: 03 May 2017
  • Publisher: Technical University of Munich
Abstract
Lithium Sulfur batteries are thought to be the next generation energy storage device, because of their high theoretical capacity and energy density. At the moment, their practical application is hindered by several issues, for example fast degradation, low Sulfur (S) utilization or the often too low S loadings to give high areal capacities. Here, a Sulfur/Carbon-composite (S/C-composite) is introduced, which can be synthesised by an easy bottom-up approach with a high S-content in the resulting powder. The existence and appearance of S on the carbon support was investigated by XRD and SEM/EDX and the S amount was measured by TGA. The influence of two different s...
Subjects
free text keywords: Chemie, Chemische Verfahrenstechnik, ddc:540, ddc:660
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104 references, page 1 of 7

4.1.2.Scanning electron microscopy and energy dispersive X-ray mapping ...................... 47

4.1.3.Thermal gravimetric analysis .......................................................................................... 50

4.1.4.Nitrogen absorption analysis ........................................................................................... 51

4.2. Electrochemical investigation of S/C-cathodes ....................................................... 54

4.2.1. Comparison of S/C-cathodes made of S/C-composite powder from the standard

and alternative synthesis route ........................................................................................ 54

4.2.2. Influence of storage on cycling performance of Li-S test cell ................................... 59

4.2.3. Impact of Sulfur loading on the discharge capacity and cycling performance ........ 63

4.2.4. Investigation of different carbon supports and their impact on the discharge

capacity and cycling stability .......................................................................................... 70

4.2.6. Use of solvent with different donor numbers and their influence on the cell

performance ....................................................................................................................... 84

4.2.7. Effect of TBA+-cation and its impact on the discharge capacity and cycling

stability............................................................................................................................... 96

List of Tables ......................................................................................................... 116

104 references, page 1 of 7
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