Inhomogeneous Charge Distribution in Anodes due to Re-Intercalation of Li Metal into Graphite
An inhomogeneous charge distribution can lead to an accelerated aging of the Lithium-ion Batteries [1]. One reason for the inhomogeneous charge distribution can be local Lithium deposition at the anode, which is often introduced by charging at high current rates or at low temperatures [1, 2, 3]. During rest time, deposited Lithium metal can spontaneously […]
Single-Ion Conducting Polymer Electrolytes for High-Energy Lithium Batteries
In order to broaden and strengthen the future application of lithium batteries, it is highly important to further increase their energy density without compromising their safety. In this regard, the use of metallic lithium as anode material is considered the next big step forward in battery research, but this requires the realization of electrolyte materials […]
The Role of the SEI in Lithium and Calcium Metal Batteries
Due to their high energy density and theoretical specific capacity, alkali and alkaline earth metal anodes are gaining increasing attention. Lithium metal is the most investigated anode candidate for next generation batteries. However, the commercialization of lithium metal anodes is still delayed by several drawbacks. Lithium metal reacts with the electrolyte, forming an inhomogeneous solid […]
Cu Dissolution and re-deposition during Over-Discharge of Li-Ion Cells – A Post-Mortem Study
Over-discharge of Li-ion cells, i.e. discharging below the end-of-discharge voltage can lead to dissolution of Cu from the current collector. In order to learn more about the underlying mechanisms, we conducted a systematic study on re-deposited Cu in commercial Li-ion cells by Post-Mortem analysis. Our study focusses on the questions (i) where is Cu it […]