| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Gasteiger, Hubert A.
Technical University of Munich
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2023Catalyst Aggregate Size Effect on the Mass Transport Properties of Non-Noble Metal Catalyst Layers for PEMFC Cathodescitations
- 2022High Power Density Automotive Membrane Electrode Assemblies
- 2021Comparative Evaluation of LMR-NCM and NCA Cathode Active Materials in Multilayer Lithium-Ion Pouch Cells: Part I. Production, Electrode Characterization, and Formationcitations
- 2021Fluorination of Ni‐Rich lithium‐ion battery cathode materials by fluorine gas: chemistry, characterization, and electrochemical performance in full‐cellscitations
- 2020HOR Activity of Pt-TiO 2-Y at Unconventionally High Potentials Explained:The Influence of SMSI on the Electrochemical Behavior of Ptcitations
- 2019Editors' choice—understanding chemical stability issues between different solid electrolytes in all-solid-state batteries
- 2019Slurry-Based Processing of Solid Electrolytes: A Comparative Binder Study
- 2018Slurry-based processing of solid electrolytes: a comparative binder study
- 2018Lithium Bis(2,2,2-trifluoroethyl)phosphate Li[O2P(OCH2CF3)2]: a high voltage additive for LNMO/graphite cellscitations
- 2017Impact of microporous layer pore properties on liquid water transport in PEM fuel cells: carbon black type and perforation
- 2015ALD deposition of core-shell structures onto electrospun carbon webs for PEM fuel cell MEAs
Places of action
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article
Fluorination of Ni‐Rich lithium‐ion battery cathode materials by fluorine gas: chemistry, characterization, and electrochemical performance in full‐cells
Abstract
The mild fluorination of Ni‐rich NCM CAMs (NCM=nickel‐cobalt‐manganese oxide; CAM=cathode active material) with a few hundred mbar of elementary fluorine gas (F2) at room temperature was systematically studied. The resulting fluorinated CAMs were fully analyzed and compared to the pristine ones. Fluorination at room temperature converts part of the soluble basic species on the CAM‐surface into a protecting thin and amorphous LiF film. No formation of a metal fluoride other than LiF was detected. SEM images revealed a smoothened CAM surface upon fluorination, possibly due to the LiF film formation. Apparently due to this protecting, but insulating LiF‐film, the fluorinated material has a reduced electrical conductivity in comparison to the pristine material. Yet, all fluorinated Ni‐rich NCM CAMs showed a considerably higher press density than the pristine material, which in addition increased with higher fluoride concentrations. In addition, fluorination of the Ni‐rich CAMs led to the chemically induced formation of small amounts of water, which according to TGA‐MS‐measurements can be removed by heating the material to 450 °C for a few hours. Overall, the tested fluorinated NCM 811 samples showed improved electrochemical performance over the pristine samples in full‐cells with graphite anodes at 30 °C and 45 °C after 500 cycles. Moreover, the fluorination apparently reduces Mn and Co cross talk from the CAM to the anode active material (AAM) through the electrolyte during charge/discharge.