Impact of Power Flow Control Strategies on the Degradation of Lithium-Ion Batteries in Heterogeneous Battery Energy Storage Systems
The technical and economic benefits of an energy storage system are strongly dependent on an optimal operation. Battery energy storage systems can eliminate, for example, the fluctuations caused by irregular power consumption or the intermittent nature of renewable energy sources and are thus suitable for peak shaving applications. This study has presented an analysis of […]
The Future of automotive Li-Ion Battery Production in Europe
Ten years ago, the European automotive industry smiled at a Californian tech-startup which applied laptop-batteries to a niche sportscar. Some years later, they began the development of electric cars themselves. At that time, legacy automotive OEMs considered Li-Ion batteries a commodity, just like the steel coils they sourced from large conglomerates, while the high-end engines […]
Electrodeposited lithium on copper foil as electrodes in lithium metal batteries
One of the main challenges of today is the storage of electrical energy. Besides the well-established system of Li-ion batteries, metallic lithium electrodes are promising due to the high specific capacity of lithium (3860 mAh/g) and its very low negative electrochemical potential (-3.040 V vs. SHE). [1] However, lithium tend to form dendrites, which causes […]
Diversification of the Battery Material Market
The lithium-ion battery market is vibrant, and the upcoming decade will set the course how Europe will deal with the growing demand for electrochemical energy storage. This rapidly growing market environment is accompanied by a steady technological evolution of battery active materials. The triumph of the lithium-ion battery started with consumer electronics and now moves […]
Interface investigation between sulfidic and oxidic electrolytes
Considering Li-ion solid-state batteries, the area of solid electrolytes can be divided into polymers, sulfidic and oxidic electrolytes. Each of the material classes and their representatives deal with individual advantages as well as drawbacks. Thiophosphates, such as Li7P3S11 (LPS), have high ionic conductivities of up to 10 mS/cm. LPS can be processed easily at room […]
A new approach for high power 48 V energy storage
Ultracapacitors are high power energy storage devices and can store and provide large power peaks. This is possible due to the physical storage of energy within the electrochemical double layer, an energy storage mechanism different from the chemical storage of energy within (Lithium-ion) batteries. While Ultracapacitors can provide high specific power, they generally lack the […]
Further development of non-contact and non-destructive methods for the localization of defects inside battery cells
Reliable non-contact and non-destructive testings are useful for the verification of quality and safety standards of battery cells. The battery cells are commonly electrically characterized. In this case a possible failure is detected but neither identified nor localized. With non-invasive internal visualization of battery cells detailed information about such failures is obtained. Scanning Acoustic Microscopy […]
Neocarbonix™ Electrodes for LiBs: Increased $/kWh Savings and Scalability
Energy storage electrodes are often limited in their electrochemical stability and electrical performance by polymer binders used in the active material layer. Binders are also used to adhere the active material to the current collector. Binders are usually polymeric resins used in electrodes to mechanically hold active material powders together. Active materials may be graphite, […]
Mechanical characterization of the electrode active layer in lithium-ion batteries
The stress-strain relationship for a dry cathode active layer in lithium-ion batteries has been characterized by a mechanical testing method that previously has been applied to the testing of optical fibers. The method is based on U-shaped bending of single-side coated aluminum foils, which enables separate measurements of tensile and compressive properties. In particular, the […]
Controlling module pressure evolution over lifetime with buffer layers: Design guidelines, prediction and validation for automotive systems
The development of cheap, energy dense lithium-ion battery systems for electric vehicles is pushed with enormous effort. Stacking pouch-type cells in modules achieves the highest energy densities. As a consequence, however, such modules require an outer bracing to provide a medium pressure environment for optimal cell operation in terms of performance, safety and lifetime. Pouch […]