Substandard? Lithium-ion cells available on online marketplaces
Access to up-to-date information on lithium-ion cells is crucial for a wide range of academic research areas. However, researchers generally do not have access to the latest cells from large manufacturers and therefore have to rely cells available on online marketplaces. To quantify the state of these cells, we collected data on 495 unique cells […]
A novel method for application-based classification of lithium-ion cells
In large-scale production, lithium-ion battery cells are usually classified only according to the two characteristics of capacity and internal resistance, provided there are no optical defects, geometric tolerance violations, high self-discharge rates or weight overruns. However, since cells are almost exclusively connected in groups (XsYp) in the application, inhomogeneities in the voltage profile must be […]
Investigation of Tailored Carbons on the Solubility of Poly(3-vinyl-N-methylphenothiazine)-Based Electrodes for Organic Batteries
Nowadays, the state-of-the-art batteries, which are most commonly used in everyday devices, are based on lithium-ions. Due to many advantages of transition metal oxides, e.g. LiCo1/3Mn1/3Ni1/3O2, they are mainly utilized as active material in this type of battery application, however, they also suffer from significant drawbacks. These include the extraction of the transition metals with […]
Available discharge energy of non-aqueous electrochemical energy storage cells vs. discharge current
Available energy is one of the most relevant parameters for dimensioning and design of battery systems. The discharge duration of a battery and its dependence on the amplitude of the discharge current are described by Peukert’s equation. Other equations describe this dependence up to very high currents, including the currents that occur during a short […]
A Multi Scale Multi Domain Approach For The Modelling Of Large Format Lithium-Ion Battery Cells
The physical processes in a lithium-ion battery (LIB) cell take place on various length scales. While MSMD models have been established to calculate the electrochemistry on the micrometer scale and map e.g. the temperature distribution in the entire battery cell on the mesoscale at the same time, two challenges remain for modeling large format cells: […]
Using a Range of Techniques to Provide Comprehensive Information on Battery Materials
Understanding battery materials and components from a chemical, thermal and mechanical standpoint is of incredible importance for ensuring quality, reducing occurrence of failures and understanding every part of the battery manufacturing chain. As we see increased regulation of the battery space, implementation of analysis at every stage of the supply chain will become more prominent […]
Understanding Electrolyte Filling of Lithium-Ion Battery Electrodes on the Pore Scale
Filling electrodes with electrolyte is a time-critical battery manufacturing step that also affects the battery performance. Most of the physical phenomena during the filling occur on the pore scale and are hard to study experimentally. Therefore, in this work, computational approaches are used to study filling processes and the corresponding pore-scale phenomena. Using the lattice […]