Prolonged Cycling Life of Si@Graphite Composite Anodes Enabling with a Polymeric Artificial SEI Protective Layer
There are several advantages including higher specific capacity (higher energy density) and low cost materials when Silicon-on-Graphite composite (Si@Gr) utilizing as anode materials for lithium-ion batteries (LIBs). However, there are several major challenges hindering the development of Si-based anodes, such as the pulverization of Si particles upon (de)lithiation due to the large changes in volume, […]
Lithium-ion battery degradation: how to model it
Predicting lithium-ion battery degradation is worth billions to the global automotive, aviation and energy storage industries, to improve performance and safety and reduce warranty liabilities. Many different degradation mechanisms occur inside LIBs and none of them can be measured directly during operation, only their consequences can be ‘observed’ but are normally lumped into capacity and […]
Abuse Simulation of Battery Packs based on the Testing of Single Battery Cells
According to several standards and regulations, battery packs must pass certain tests with respect to their abuse behavior. Especially, the thermal propagation, induced by one cell and resulting in a catastrophic failure of the whole pack, is hereby addressed and must be impeded by constructional measures. Within the relating design process, simulations of the applied […]
Direct characterization of float currents to estimate the aging be-havior and path dependence
Lithium-ion batteries have become the most important driver especially for mobile, but also for stationary energy storage in many applications. Before integrating an appropriate cell type into a system, manufacturers of battery systems make a benchmark of the available batteries that suit to their application based on the cell’s datasheet. Additionally, the cell quality has […]
Sustainable manufacturing route of polymer electrolyte based all-solid-state separators by a highly scalable film casting process
All-solid-state batteries offer great potential as next-generation batteries as they enable the use of a lithium metal anode. This technology offers the potential to improve fast charging properties, the achievable energy density as well as safety [1]. In order to develop competitive all-solid-state batteries, cost efficient and highly scalable manufacturing methods need to be identified […]
Lithium Ion Cell Quality Assurance and Good Manufacturing Practices
Lithium ion cells have become extremely diverse and customizable with various form factors, energy capacities, electrolytes, and active materials. As more cell types become available, so too do the number of manufacturers and manufacturing processes. As such, determining the quality of cells and whether proper manufacturing processes are followed can be difficult. While various standards […]
Towards more realistic Li-ion battery safety-tests based on Li-plating as internal cell error
Li-ion batteries are expected to perform in a wide range of operating conditions. Nevertheless, extreme operating temperature, voltage or current can result in significant safety issues including Li- and Cu-plating, gas formation, venting and even thermal runaway. Normally, battery management systems (BMS) ensure that the battery operates within the boundaries of these critical parameters. However, […]
Effects of different parameters on the behavior of Lithium-Ion Batteries under crushing loads
Nowadays lithium ion batteries (LIB) became one of the key technologies for energy storage in different applications because of their high energy density and their advanced stage of development. Therefore, LIB’s are not simply rated by their performance parameters but also by issues of safety. With respect to the interaction of electrical and chemical hazards […]
Mg-Ion-Based Dual-Ion Batteries – An Electrolyte Study
In order to meet the demands for future energy storage, a broad variety of batteries is desired. While lithium ion batteries (LIBs) are currently used for most portable electronic devices and electric vehicles, the abundancy of its raw materials might lead to shortages in the future.[1] One alternative system are dual ion batteries (DIBs), which […]
Pre-Lithiation of Silicon-Based Anodes via Electrolysis of Cost-Efficient Lithium Salts
One of the main challenges for application of negative electrodes with high Si-content for high-energy lithium ion batteries is the huge volume expansion of Si upon lithiation and consecutive high irreversible capacities due to continuous formation of the solid/electrolyte interphase (SEI). To diminish the loss of active lithium and to enable anodes with high Si-contents […]