P1-065
Solid-state batteries are a promising new technology that could revolutionize lithium-ion technology. There are a few differences to consider when selecting a solid electrolyte. While ceramic electrolytes have comparatively good ionic conductivity and are stable electrochemically and mechanically, their surface properties leave much to be desired. Since they are very hard and immobile, contact with […]
P3-072
The research group at HAW Hamburg investigates the monitoring of battery cells utilizing the electrochemical impedance spectroscopy (EIS), which is an important method for analyzing battery condition and ageing. Although EIS is widely used in the lab, it is not yet implemented as online measurement technique in vehicles. Within this context, the focus in the […]
P1-007
Lithium metal batteries (LMBs) are attractive for applications requiring high specific energy. There are still some hurdles to overcome on the way to the commercial application of LMBs. The main problems lie in the cycle stability of LMBs and safety concerns. This is due to heterogeneous lithium deposition, which may damage the separator and cause […]
P2-016
Paramagnetic materials have garnered significant research attention due to their tunable composition, size, shape and magnetic properties making them suitable for a wide range of applications, including contrast agents, electromagnetic dampers and isolators, magnetic refrigeration systems and energy storage. However, understanding structural features of paramagnetic materials is crucial for improving their performance. Solid-State NMR spectroscopy […]
P4-014
3D electrode architectures not only allow a rapid and homogeneous wetting of the electrodes with liquid electrolyte by choosing appropriate capillary patterns, but can also enhance electrochemical properties such as high-rate capability and cell lifetime, especially when the cells are operated at elevated C-rates. Recently, various electrode designs based on lines, grids, holes, or hexagonal […]
P4-015
In this approach, a method for the automated generation of a characteristic daily profile from extensive time series data of electric commercial vehicles is developed. The underlying data comes from eight electric buses, which were recorded over a period of twelve months with high temporal resolution. The aim is to classify the large amounts of […]
P2-050
In-situ Scanning Electron Microscopy (SEM) has emerged as a pivotal tool for studying dynamic processes in battery materials. Variants such as in-situ heating, biasing, and gas reactions enable unique insights, from electrochemically driven structural evolution in solid-state batteries (SSBs) to particle growth tracking during high-temperature gas-solid reactions for cathode synthesis. In-situ biasing SEM imaging reveals […]
P5-040
The lifetime of Li-ion Batteries (LIB) depends on the reversible amount of Li ions and electrons (= active Li), defining Li inventory and cell capacity. Active Li loss (ALL) occurs at the negative electrode (= anode) predominantly via electrolyte reduction and formation of the solid electrolyte interphase (SEI). Nevertheless, given interference of the cathode, anode […]
P2-032_Hoch
In battery research, effective parameter identification and performance optimization are critical for advancing future battery systems. A promising non-destructive analysis method is computed tomography (CT), which offers high-resolution, three-dimensional insights into internal battery structures. CT enables the examination of key parameters, such as cathode thickness, anode overhang, and structural integrity, without damaging the batteries. However, […]
P4-004
In BEV the technical progress is driven by the performance and reliability of traction batteries. Customers’ demands for long ranges and performance are leading to a steady increase in the energy density of battery cells. Since the active materials are performance and lifetime determining and most valuable components of a single battery cell, most development […]