Prediction of battery aging with a detailed lithium plating model
The efficient and fast charging of lithium-ion batteries remains one of the most delicate challenges for the automotive industry, being seriously affected by the formation of lithium metal on the surface of the negative electrode. At high states of charge, plating competes with and even replaces the intercalation reaction. Experimental evidences for plating include a […]
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 […]
Increased Energy Density and Cycle Life through Direct Contact Prelithiation
Nowadays, lithium-ion batteries are the technology of choice for many applications in the field of consumer electronics and electric mobility. To meet the requirements for the application in electric vehicles, lithium-ion battery technology has many challenges to overcome related to energy density, lifetime, and overall costs. New materials, electrode designs, and production processes for lithium-ion […]
Structuring concepts for innovative electrodes for LIB
Although lithium-ion batteries (LIB) have reached enormous progress over the last years, a further increase of energy density and a reduction of costs are demanded to promote acceptance for substantial applications like electric vehicles. Based on the choice of adequate active materials, an approach to effectively realize high energy electrodes and save costs at the […]
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 […]
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 […]
Influence of Nickel Content on the Electrochemical Performance of Ni-rich Cathodes at different States of Aging: Experimental Analysis and Theoretical Modeling
Ni-rich layered transition metal oxides are established as the principal cathode material candidates of the next generation of lithium-ion batteries. A high specific capacity and power capabilities, improved cost efficiency, and a reduction in the difficult to source cobalt content, are among the advantages of a higher Ni content. However, noticeable structural degradation during cycling […]
Investigation on the Gas Saturation of Electrolyte on the Performance of Lithium-Ion Batteries
Plenty of research and development about electrolytes in lithium-ion batteries has been published over the past years, for instance on conducting salts, solvents, and additives. It is well known that gases are formed during formation and operation of a lithium-ion battery. Mainly, those gases are attributed as products of SEI formation, and they are not […]
Model-based screening of electrode designs for charge and discharge
The performance characteristic and energy density of lithium-ion batteries are significantly affected by the chosen cell design. The trend toward higher areal mass loadings enables an increase of the volumetric energy density of a cell due to a higher active to passive material ratio and a potential cost reduction due to a higher production throughput […]