Laser sintering of ceramic-based solid-state battery materials
Solid-state batteries are a promising technology for high travelling ranges and safety in future electromobility. In a solid-state battery, separator and liquid electrolyte materials are combined to one solid-state electrolyte layer. Suitable ceramic materials are lithium lanthanum zirconate (LLZ) as electrolyte and lithium cobalt oxide (LCO) as cathode active material. For the cathode layer, a […]
SEI development study – Accumulation and identification of SEI-derived species from lithium metal anodes
Up to now there have been many studies on the morphology and the components of the SEI, always trying to add the next piece in solving the puzzle of this interphase. But the main issues with the analysis of this interphase remain. The fact that the SEI changes over the quantity and parameters of performed […]
Legal framework for sustainable battery-operated products
The analysis of battery-powered products from different industries shows how sustainable they are. The focus is not only on the batteries, but also on the charging infrastructure and the devices themselves. In addition to the customer’s point of view, in particular user behavior, the problem of manufacturers and government intervention options are discussed. Solutions from […]
Legal framework for sustainable battery-operated products
The analysis of battery-powered products from different industries shows how sustainable they are. The focus is not only on the batteries, but also on the charging infrastructure and the devices themselves. In addition to the customer’s point of view, in particular user behavior, the problem of manufacturers and government intervention options are discussed. Solutions from […]
Thickness change and jelly-roll deformation and its impact on the aging and lifetime of commercial 18650 cylindrical li-ion cells with silicon containing anodes and NCA cathodes
In this work, different commercial available cylindrical cells in the format 18650 with each NCA cathode and anodes containing different silicon materials were electrochemically long-term cycled. Multiple Computed Tomography (CT) images were carried out after a settled number of completed cycles. Two voltage windows and their influence on the aging of the cells were investigated. […]
Concepts for Compensating Pressure Fluctuations Inside Future Lithium-Ion Battery Cells
Due to the steadily increasing expectations of end users on the range, longevity and ecological compatibility of lithium-ion battery systems, intensive work is being done on the development of new material systems for lithium-ion batteries. Among the most promising approaches are both improved liquid electrolyte systems (e.g. silicon composites or sulfur cathodes) and solid-state systems […]
Investigation of the Influence of a WO₃ Coating on High-Ni NCM-Type Layered Oxide Cathode Materials
Ni-rich Li(Ni,Co,Mn)O₂ (NCM)-type layered oxide cathode materials are promising candidates to satisfy the increasing energy demand for lithium ion batteries for automotive applications. The main advantages of increasing the nickel content lies on an increased energy density on the material level and the reduction of cobalt as critical raw material.¹ However, there are major drawbacks […]
Investigation of the Influence of a WO₃ Coating on ultrahigh-Ni NCM-type layered Oxide Cathode Materials
Ni-rich Li(Ni,Co,Mn)O₂ (NCM)-type layered oxide cathode materials are promising candidates to satisfy the increasing energy demand for lithium ion batteries for automotive applications. The main advantages of increasing the nickel content lies on an increased energy density on the material level and the reduction of cobalt as critical raw material.¹ However, there are major drawbacks […]
Investigation of Homogeneity and Reversibility of Deposited Lithium on the Graphite Anode Surfaces
Lithium-ion batteries (LiBs) are considered to be one of the most important storage devices for electric energy, especially with regard to automotive applications. To ensure safety, investigations on aging processes, especially lithium plating, are of great interest. A process accelerating cell aging that occurs especially during charging at low temperatures, high C-rates or high SOCs […]
Assessment of coating defect criticality in lithium-ion battery electrodes
State-of-the-art battery production suffers from high scrap rates, which are reported to range between 5 % and 30 % or even more, depending on the manufacturer [1,2]. Lowering these rates will be required in order to reach strategic targets, such as battery prices of less than 100 € kW h-1. Scrap may originate from various […]