Project 2-6

Structural modifications of the cathode will lead to aging and loss of performance. The focus of this project is the comparison of structures throughout the life cycle of a battery. We will start with model systems to investigate the role of different impurities in aging effects. In a second step we will use the cells as fabricated in other projects of the research training group and investigate the structure-performance relations at different stages of aging.

Specific objectives:

• Effect of organic and inorganic impurities on structure modifications in model systems
• Optimize sample preparation of batteries as used within the research training group
• Using a variety of experimental techniques with high spatial resolution, such as scanning probe and electron microscopy/spectroscopy techniques
• Study structure-performance-relations for those batteries at all stages of their life cycle
• Synchronization of the experimental results with the central data base of the research training group

Expected outcome:

• We expect a strong influence in particular of some organic impurities on the aging.
• Correlations between structure and performance of the cathode at different stages of its life cycle.
• Anticipate important feedback with other projects of this research training group on optimization of battery life times.