Analysis of the SEI growth during cell formation based on differential voltage analysis
The properties of the solid electrolyte interface (SEI) are critical for safety and aging of lithium-ion batteries. The SEI is mainly built during the first few charge/discharge cycles, the so-called cell formation. Composition and morphology of the SEI are influenced by many factors, such as electrolyte composition, electrode structure, temperature, and formation protocol [1,2]. Moreover, […]
High Temperature Formation – Supressing gas evolution in LTO||NCM111 Pouch Cells
The spinel-type negative electrode active material Li4Ti5O12 (LTO) is a prominent candidate with regard to its application in lithium-ion batteries (LIBs) for high-power applications. While commercially used graphite-based LIBs struggle with high current densities and the mostly corresponding wide temperature stability window, LTO offers a high C-rate capability, long cycle life, high thermal stability and […]
Modelling degradation of nickel-rich cathodes induced by phase transition
Nickel-rich positive electrodes (e.g., NMC811) are becoming popular thanks to their high energy density and good rate capability. However, their layered structures are prone to phase transitions to disordered spinel and rock-salt structures when a large fraction of lithium diffuses out, leading to capacity fade and electrode degradation. To model this type of degradation, we […]
Alternative sustainable binders and solvents for cathode application in Li-ion battery
From the ecological and environmental point of view, the use of renewable energies is becoming more and more important in our days and in the future. To this effect, Li-ion batteries have proven to be promising systems on the way to more ecological energy supply, especially for electromobility. In commercial evaluable Li-ion batteries, cathode binders […]
An energy management concept with a load-prediction engine toimprove the fuel economy of a hybrid maritime propulsion system
To reduce anthropogenic greenhouse gas emissions, novel and clean propulsion technologies are being developed in the maritime sector. Hybrid powertrains consisting of batteries and fuel cells represent a good alternative to conventional propulsion systems due to their potentially high energy and power density and low emissions. By employing prediction algorithms, which forecast upcoming load demands […]
An energy management concept with a load-prediction engine toimprove the fuel economy of a hybrid maritime propulsion system
To reduce anthropogenic greenhouse gas emissions, novel and clean propulsion technologies are being developed in the maritime sector. Hybrid powertrains consisting of batteries and fuel cells represent a good alternative to conventional propulsion systems due to their potentially high energy and power density and low emissions. By employing prediction algorithms, which forecast upcoming load demands […]
Electrical Detection of Lithium Plating Markers in Lithium-Ion Batteries
Lithium plating (accumulation of metallic lithium) is a safety-critical phenomenon that occurs mainly during fast charging of lithium-ion batteries at cold temperatures. It is caused on the anode by the limited capability to absorb lithium ions at the desired rate. Reversible and irreversible plating can be accompanied by the formation of dendrites and lead to […]
Battery Testing Consortium: A Framework for Improvements in High-Power Battery Design
The Battery Testing Consortium aims to quantify and analyse high-power cells for usage in Formula Student applications. This project provides the largest engineering competition community with insight into electrochemical degradation mechanisms, thermal properties and their corresponding design requirements, usable energy and power densities, and calibration data for battery management systems. This is completed through a […]
Densification of cathodes and separators with sulfide-based solid electrolyte for all-solid-state batteries
All-solid-state batteries are promising for the next generation of lithium-ion batteries. The replacement of the liquid electrolyte with a solid material can enhance the energy and power density, as well as the battery safety. Electrolytes composed of sulfides are one interesting candidate, as they have high ionic conductivity. Promising first results have been obtained with […]
Reducing the stress factor in high-energy silicon/graphite composite electrodes through systematic structuring
The work in this poster described here, combines two methods for improving the performance characteristics of lithium-ion batteries. On the one side, the development and application of silicon-containing active material mixtures is a promising prospect for the use in high-energy anodes. While the use of Silicon increases the energy density of the anodes due to […]