Structuring of ultra-thick high-energy silicon/graphite anodes by multilayer coating
Lithium-ion battery cells with high specific capacity and energy density are one of the current research priorities in industry and science. The challenges of these so-called “thick” electrodes are transport limitations within the electrode: lithium ions cannot reach the deeper layers of the electrode coating, which leads to a drop in performance during charging and […]
Mechanical recycling of production scraps from electrode manufacture
Economic and sustainable battery cell production is an indispensable requirement for electric vehicles to become an important part of the energy revolution. That is why the development of efficient recycling processes and novel recycling strategies is part of numerous research projects. The aim is to close the material cycle in battery cell production to the […]
Influence of impurities on the recycling process of NCM active materials
One of the challenges in the future of lithium battery recycling technology is to obtain a stable resynthesis process of recycled materials which leads to new usable active materials (e.g., NCM). Besides that, this process should be robust to contaminations such as iron, aluminum, copper, and other ions, coming from battery casings, current collectors or […]
100%-Si / NCM lithium-ion full cell investigation based on columnar silicon anodes with a tailored microstructure
The great demand of high volumetric energy density (>1000 Wh/L) for energy storage systems in electric vehicles and mobile devices pushes both academia and industry tremendously to outperform state-of-the-art (SoA) lithium-ion batteries (LIB) (~650 Wh/L). The limiting component in SoA-LIBs is the graphite anode comprising restricted volumetric capacity (740 mAh cm-3). With its high abundance […]
Effective Stabilization of NCM622 Cathodes in Aqueous/Non-Aqueous Hybrid Electrolytes by Adding a Phosphazene Derivate
Summary In recent years, the occurrence of battery fire incidents has aroused public concerns, in which the used flammable electrolytes in most batteries plays a key role.[1, 2] Regarding this, aqueous electrolytes have become a promising alternative to enhance the battery safety by their intrinsic non-flammability. Especially, after reporting so-called “water-in-salt” electrolytes,[3] aqueous electrolytes are […]
Improving the Li ion flux by a lithiophilic protective layer and morphological investigations of HSAL formation
The increasing demand for high-energy battery systems has led to investigations for replacing the graphite anode of Li-ion batteries with Li metal due to its high theoretical capacity and high negative potential. The combination of a Li metal anode and a Li-ion cathode can enable high energy density batteries due to a significantly higher specific […]
The Impact of Thermal Gradients on the Aging Behavior of Lithium-Ion Batteries
Temperature is a dominant parameter in lithium-ion batteries’ aging behavior. Aging mechanisms in lithium-ion batteries correspond to unwanted side reactions, often associated with film formation on the electrodes. This work shows measurement results illustrating the effect of thermal gradients on the aging behavior of a commercial nickel-rich pouch lithium-ion battery. Using a carefully designed test […]
100%-Si / NCM lithium-ion full cell investigation based on columnar silicon anodes with a tailored microstructure
The great demand of high volumetric energy density (>1000 Wh/L) for energy storage systems in electric vehicles and mobile devices pushes both academia and industry tremendously to outperform state-of-the-art (SoA) lithium-ion batteries (LIB) (~650 Wh/L). The limiting component in SoA-LIBs is the graphite anode comprising restricted volumetric capacity (740 mAh cm-3). With its high abundance […]
Data-Driven Analysis of High-Throughput Experiments on Liquid Battery Electrolyte Formulations
In all types of past, current and future batteries, electrolytes and their ad hoc interfacial/interphasial chemistries play a central role in terms of design and control of the electrode processes, material interactions, overall performance, long-term stability, safety and cost of a battery. [1-3] However, the complex nature of the electrolyte and the different structure-performance-relation remain […]
Physical Vapor Deposition of Metallic Lithium Layers and Lithiated Silicon Layers for High-Performance Anodes
Currently, significant worldwide research activities are carried out to accomplish more efficient energy storage methods and to overcome challenges in using regenerative energy continuously. For Li-ion batteries, the volumetric energy density may be increased considerably by substituting conventional graphite anodes with materials based on Si and also in prospective by metallic Li. However, there is […]