Bernhard Roling’s research while affiliated with Philipps University of Marburg and other places

... This paper constitutes a presentation of work in progress at a discussion session of the conference Dense ionic fluids Faraday Discussion, 8-10 July 2024, London, and is published on pages 293-295 in Ref. [1]. ...

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On the strength of underscreening

... where c S is the concentration of solvent molecules in bulk, and D S is the diffusion constant of the solvent molecules through the SEI. The physical credibility behind the process is also highly discussed, e.g., the solvent molecules have to be able to diffuse through the SEI pores, even though their reaction should close those [48]. Despite decades-long research efforts, the scientific community cannot fully explain the SEI growth, suggesting that the SEI is complex and possibly based on multiple coupled mechanisms. ...

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Physics-based inverse modeling of battery degradation with Bayesian methods

... Electroanalysis, 2024 lithium-ion batteries. Similarly, König et al. [17] demonstrated that the high frequency semicircle and the low-frequency Warburg impedance in all-solid-state batteries primarily originate from the cathode, whereas the intermediate and low frequency semicircles are linked to the anode impedance. To associate specific impedance features with the anode and cathode, a frequency dependency analysis was conducted. ...

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Equivalent Circuit Model for Electrochemical Impedance Spectroscopy of Commercial 18650 Lithium‐Ion Cell Under Over‐Discharge and Overcharge Conditions

... Documentation of the synthesis steps is beyond the scope of KNMF i and this paper. Examples for the variety of materials and scientific questions in the user-facility are high-entropy alloys (Dollmann et al., 2022;Taheriniya et al., 2023), metals (Kashiwar, Hahn, and Kübel, 2021;Hong et al., 2022), metallic glasses (Kang et al., 2023), catalysts (Prates Da Costa et al., 2023), battery materials (Wang et al., 2023;Pantenburg et al., 2023), (Ikram et al., 2019;Kroll et al., 2021) solid-state electrolytes (Ding et al., 2022), fuel cells (Léon, Schlabach, and Villanova, 2023), magnetic materials (Molinari et al., 2022), hybrid materials (Krüger et al., 2018), hydrogen storage materials (Jin et al., 2022), porous materials (Reinhardt et al., 2020), interfaces (Eusterholz et al., 2023), or biological materials (Barthlott et al., 2020). In an ideal case, the materials/samples to be investigated or prepared for investigation are well described and labeled, so that material/sample tracking is easily feasible. ...

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Using ELN Functionality of Kadi4Mat (KadiWeb) in a Materials Science Case Study of a User Facility

... Due to the capabilities of extracting transport parameters, transmission line modeling of the electrode composite impedance spectra is used frequently, for instance, in NCM622-SE composites by Minnmann et al. [16] and Schlautmann et al. [24], LiMn 2 O 4 -SE composites by Hendriks et al. [17], as well as silicon-carbon-SE composites by Rana et al. [11]. Furthermore, Ohno et al. [25] and König et al. [26] successfully employed transmission line modeling to investigate carbon-SE systems applicable to sulfur solid-state cathodes and ionic transport in wetmilled NCM-Li 5.3 PS 4.3 ClBr 0.7 composites. A TLM study on the tortuosity of battery electrodes by Landesfeind et al. [27] shows that the TLM can successfully be employed for solid-state composites and that the tortuosity factor in these composites is significantly higher than the prediction made by Bruggemann Cronau et al. for instance, who have used the TLM for a thickness-dependent impedance study of LiCoO 2 cathodes in a liquid electrolyte system, which are generally well understood with transmission line modeling, showing that tortuosity factors are virtually independent of electrode thickness between 44 and 251 μm [28]. ...

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Exploring the Temperature and Composition Dependence of the Ionic Transport in Solid-State Battery Composites

... In the case of a lithium metal anode, the formation of Li dendrites is an unavoidable electrochemical phenomenon caused by the repeated stripping and uneven deposition of Li ions on the surface [11]. Cronau et al. illustrated that for advanced secondary (rechargeable) sodium batteries (ASSBs) that utilize carbon-based anodes with a deposition mechanism, the battery's discharge capacity can be substantially enhanced through two primary methods [12]. Firstly, by actively managing the pressure within the battery stack, and secondly, by applying heat and pressure to the anode and separator that contain the binder. ...

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Advanced Lithium Batteries and Fast-Charging Technology: Challenges and Future Directions

... 11 On the other hand, a high salt concentration leads to a slowing down of the dynamics of ions and solvent molecules, resulting in higher viscosities and lower ionic conductivity compared to the standard battery electrolyte. 1,12,13 Due to strong ion-ion and ion-solvent interactions in HCEs, there are dynamic correlations between the movements of distinct ions, 5,14,15 which can have a strong impact on charge and mass transport in batteries. 14,15 The transport properties of a binary Li + conducting electrolyte (single salt in a single solvent) can be described by three Onsager coefficients , and and a + + --+thermodynamic factor. ...

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Overdetermination Method for Accurate Dynamic Ion Correlations in Highly Concentrated Electrolytes

... In addition, the peak shift and disappearance of the small PS 4 3tetrahedron main peak is attributed to the presence of thio-LISICON II phase; where the sulfur-to-phosphorous ratio is high. Thus the laser Raman results well matched with our powder X-ray diffraction analysis 24,25 . Moreover, we did not observe any characteristics corresponding to the M-S structure due to the low doping concentration. ...

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Improved interfacial stability of all-solid-state batteries using cation-anion co-doped glass electrolytes

... The EIS measurements collected can be described accurately by the equivalent circuit (EC) model R 0 -(RQ) 1 -(RQ) 2 -(RQ) 3 ( Figure S1a-b), in accordance with the literature reporting symmetrical cells with a SE and reversible electrodes. 30,31,38 Table S1 compares the specific capacitance (C i ) for each individual (RQ) i component determined from the equivalent circuit model fitting of a symmetric Li/SE/Li cell. ...

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Understanding Interfaces at the Positive and Negative Electrodes on Sulfide-Based Solid-State Batteries

... Furthermore, Ohno et al. [25] and König et al. [26] successfully employed transmission line modeling to investigate carbon-SE systems applicable to sulfur solid-state cathodes and ionic transport in wetmilled NCM-Li 5.3 PS 4.3 ClBr 0.7 composites. A TLM study on the tortuosity of battery electrodes by Landesfeind et al. [27] shows that the TLM can successfully be employed for solid-state composites and that the tortuosity factor in these composites is significantly higher than the prediction made by Bruggemann Cronau et al. for instance, who have used the TLM for a thickness-dependent impedance study of LiCoO 2 cathodes in a liquid electrolyte system, which are generally well understood with transmission line modeling, showing that tortuosity factors are virtually independent of electrode thickness between 44 and 251 μm [28]. Additionally, it is standard practice to investigate solid oxide fuel cells using the TLM. ...

Reference:

Exploring the Temperature and Composition Dependence of the Ionic Transport in Solid-State Battery Composites