A5103047057- Advanced Battery Technologies Research
- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Analytical Chemistry and Sensors
- Electrochemical Analysis and Applications
- Ionic liquids properties and applications
- Fuel Cells and Related Materials
- Advanced Chemical Sensor Technologies
- Supercapacitor Materials and Fabrication
- Conducting polymers and applications
BMW (Germany)
2020-2024
BMW Group (Germany)
2020-2024
University of Agder
2024
Technical University of Munich
2017-2020
Curtin University
2019
The trend for increased nickel content in layered transition metal oxide cathode active materials and increasing charging cut-off voltages aggravates aging of lithium-ion battery cells at high state charge (SOC). We investigate the calendaric behavior large-format automotive prototype laboratory single-layer pouch but realistic cell voltages/SOCs demonstrate that electrolyte oxidation combination with follow-up reactions can cause a significant loss LiPF 6 salt electrolyte. For this, we...
Fast-charging is a key requirement for customer acceptance of battery electric vehicles. In this work, various methods lithium-plating detection are applied to prismatic hard-case lithium-ion cells demonstrate their applicability large-format automotive despite possible thermal and electrochemical inhomogeneities. Different fast-charging profiles with charging time less than 30 min from 10% 80% state-of-charge examined based on coulombic efficiency, cell voltage analysis swelling force. To...
Optimization of cell formation during lithium-ion battery (LIB) production is needed to reduce time and cost. Operando gas analysis can provide unique insights into the nature, extent, duration process. Herein we present development application an Online Electrochemical Mass Spectrometry (OEMS) design capable monitoring evolution consumption in both model coin-cells (Q = 0.72 mAh) with a graphite/electrolyte weight-ratio 1:12.5 large-format Li-ion cells 72 Ah) 1:0.63 operation. Although...
Electrolyte motion induced salt inhomogeneity (EMSI): during cycling, electrolyte moves into and out of the jelly roll, which leads to a lasting in-plane LiPF 6 concentration gradient, possibly causing secondary effects like localized lithium plating.
Fast charging is a key requirement for customer acceptance of battery electric vehicles. lithium-ion batteries limited by lithium plating, an undesired side reaction that leads to rapid degradation and poses potential safety hazard. In order approach but not exceed the plating current limit during fast charging, variety analytical tools have been developed detect plating. this publication, we propose new impedance-based method time-resolved detection The proposed was demonstrated with...
The electrification of the transport sector places ever-increasing demands on energy density, fast-charging performance, and lifetime lithium-ion cells. In this study, we investigate high density (~ 800 Wh/L) prototype cylindrical 4695 cells with two different (“low” “high”) electrolyte amounts. Using pore volume calculations, computer tomography moment inertia measurements, find that change active material causes motion into out jelly roll upon cycling in cells, while no occurs low At same...
The electrochemical properties of gas molecules are great interest for both fundamental and applied research. In this study, we introduce a novel concept to systematically alter the behavior and, in particular, redox potential neutral molecules. is based on use an ion-binding agent, or "ionophore", bind stabilize ionic reaction product. We demonstrate that ionophore-assisted oxidation hydrogen room-temperature liquid electrolyte shifted by almost 1 V toward more negative potentials...
Due to the decision by European Union stop sales of combustion-based vehicles after 2035, all car manufacturers are in search close this gap with alternative solutions. As Lithium-Ion batteries (LIBs) already an integral part our everyday life, battery based electric (BEVs) expected be one possible for individual mobility tomorrow. Therefore, original equipment (OEMs) who want produce their own cells must deal many challenges as LIB is most expensive single component used EVs. Reducing costs...
Batteries using Ni-rich cathode active materials are the most common cells in automotive sector. They offer a high energy density at competitive prices which makes them attractive wide-range of applications. [1,2] However, higher Ni-content results more challenges for battery lifetime comparison to low-Ni materials. These aggravated elevated temperatures and SOCs, stemming from detrimental side-reaction, such as parasitic heat oxygen release. [3–6] In this study, we investigated an aging...
<p>The electrochemical properties of gas molecules are great interest for both fundamental and applied research. In this study, we introduce a novel concept to systematically alter the behavior and, in particular, redox potential neutral molecules. The is based on use an ion-binding agent, or ‘ionophore’, bind stabilize ionic reaction product. We demonstrate that ionophore-assisted oxidation hydrogen room temperature liquid electrolyte shifted by almost 1 V towards more negative...
The electrochemical properties of gas molecules are high interest for both fundamental and applied research. In this study, we introduce a novel concept to systematically alter the behavior and, in particular, redox potential neutral molecules. is based on use an ionophore bind stabilize ionic reaction product. We demonstrate that ionophore-assisted oxidation hydrogen room temperature liquid electrolyte shifted by almost 1 V towards more negative potentials comparison ionophore-free...
The electrochemical properties of gas molecules are great interest for both fundamental and applied research. In this study, we introduce a novel concept to systematically alter the behavior and, in particular, redox potential neutral molecules. is based on use an ion-binding agent, or ‘ionophore’, bind stabilize ionic reaction product. We demonstrate that ionophore-assisted oxidation hydrogen room temperature liquid electrolyte shifted by almost 1 V towards more negative potentials...
In this contribution we will discuss our current understanding of the electrolyte oxidation mechanisms in lithium-ion batteries as well various follow-up reactions that are triggered by oxidation. Using online electrochemical mass spectrometry (OEMS) combination with a two-compartment cell, which solid lithium ion conductor serves diffusion barrier between anolyte and catholyte compartments, it could be shown solvents at high potentials leads to formation protic species [1]. one-compartment...