2025

• Hesper, Jakob Michael, Weigel, Simon, Hintemann, Jan Henrik, Minar, Jaroslav, Winter, Martin, Wiemers-Meyer, Simon, and Nowak, Sascha. 2025. “Quantitative Study of Electrolyte Residues in Black Mass using LC-MS/MS and IC-CD.” contributed to the 15. Kraftwerk Batterie Fachtagung, Aachen.
• Fehlings, Nick, Hesper, Jakob, Weiling, Matthias, Kubot, Maximilian, Winter, Martin, Wiemers-Meyer, Simon, and Nowak, Sascha. 2025. “Chromatographic Investigations of Degradation Products for Fluoroethylene-Carbonate Based Electrolytes.” contributed to the AABC Europe, Mainz.
• Hesper, Jakob, Heidler, Marie, Ulke, Jessica, Kraft, Vadim, Jochems, Philipp, Hintemann, Jan, Winter, Martin, Wiemers-Meyer, Simon, and Nowak, Sascha. 2025. “Sustainable Extraction and Separation of Battery Electrolytes from Black Mass Using Supercritical Carbon Dioxide.” contributed to the AABC Europe, Mainz.
• Fehlings, Nick, Weiling, Matthias, Hesper, Jakob, Kubot, Maximilian, Winter, Martin, Wiemers-Meyer, Simon, and Nowak, Sascha. 2025. “Chromatographic investigations of degradation products for fluoroethylene-carbonate based electrolytes.” contributed to the The 15th International advanced automotive battery conference, Mainz.
• Hesper, Jakob, Weigel, Simon, Hintemann, Jan Henrik, Minar, Jaroslav, Winter, Martin, and Wiemers-Meyer, Simon Nowak Sascha. 2025. “Uncovering the Residual Electrolyte Quantity in Recycled Battery Black Mass via LC-MS/MS and IC-CD.” ChemSusChem xxx 2501158. doi: 10.1002/cssc.202501158.

2024

• Hesper, Jakob Michael, Hintemann, Jan Henrik, Minar, Jaroslav, Winter, Martin, Wiemers-Meyer, Simon, and Nowak, Sascha. 2024. “Detailed Study of Electrolyte Residues in Shredded Lithium Ion Battery Recyclate.” contributed to the BACCARA Power Day 2024, Münster.
• Hesper, Jakob Michael, Winter, Martin, Wiemers-Meyer, Simon, and Nowak, Sascha. 2024. “Dependency of sample introduction on the analysis of electrolyte residues in LIB recycling material via GC-MS.” contributed to the 53. Jahrestagung der Deutschen Gesellschaft für Massenspektrometrie, DGMS, Freising.
• Hesper, Jakob Michael, Winter, Martin, Wiemers-Meyer, Simon, and Nowak, Sascha. 2024. “How the Sample Introduction Influences the Result: Identification of Electrolyte Residues in LIB Recycling Material via GC-MS.” contributed to the Advanced Battery Power Conference, Münster.
• Hesper, Jakob Michael, Winter, Martin, Wiemers-Meyer, Simon, and Nowak, Sascha. 2024. “Quantitative Analysis of Volatile Electrolyte Residues in Blackmass Using Thermal Desorption-GC-MS/FID.” contributed to the Batteries Event, Lyon.
• Ulke, Jessica, Heidler, Marie, Hesper, Jakob, Winter, Martin, Wiemers-Meyer, Simon, and Nowak, Sascha. 2024. “Recycling of Electrolyte from Lithium Ion Batteries: A Study on Supercritical Carbon Dioxide Extraction with Co-solvents.” contributed to the Advanced Battery Power Conference, Münster.
• Heidler, Marie, Hesper, Jakob Michael, Zensich, Maximiliano, Winter, Martin, Wiemers-Meyer, and Nowak, Sascha. 2024. “EXTENDING THE LIFE OF LITHIUM IRON PHOSPHATE (LFP) CATHODE ACTIVE MATERIAL: A SECOND LIFE APPROACH.” contributed to the Batteries Event, Lyon.
• Heidler, Marie, Hesper, Jakob Michael, Zensich, Maximiliano, Winter, Martin, Wiemers-Meyer, and Nowak, Sascha. 2024. “SECOND LIFE FOR LITHIUM IRON PHOSPHATE (LFP) CATHODES: A SUSTAINABLE APPROACH TO MATERIAL LIFESPAN EXTENSION.” contributed to the The 15th International Conference on Advanced Lithium Batteries for Automotive Applications, Montreal.

2023

• Sven, Künne, Jakob, Michael Hesper, Tobias, Lein, Karsten, Voigt, Dr., Daria Mikhailova, Prof., Alexander Michaelis, Prof., Martin Winter, Dr., Tobias Placke, and Dr., Christian Heubner. 2023. “Hybrid High-Voltage LiNi0.5Mn1.5O4/Graphite Cathodes Enabling Rechargeable Batteries with Simultaneous Anion- and Cation Storage.” Batteries & Supercaps 6 (9). doi: 10.1002/batt.202300284.
• Hesper, Jakob, and Nowak, Sascha. 2023. “Identification and Quantification of Lithium Ion Battery Electrolyte Residues in Blackmass Via Headspace-GC-MS/FID.” contributed to the 244th ECS Meeting, Göteburg.
• Hesper, Jakob, Wiemers-Meyer, Simon, Winter, Martin, and Nowak, Sascha. 2023. “Identification and Quantification of Lithium Ion Battery Electrolyte Residues in Blackmass Via Headspace-GC-MS/FID.” contribution to the 244th ECS Meeting October, Göteburg doi: 10.1149/MA2023-02653058mtgabs.
• Hesper, Jakob Michael, Winter, Martin, and Nowak, Sascha. 2023. “Recycling and Analysis of Lithium Ion Battery Electrolyte via Supercritical Fluid Extraction.” contributed to the Advanced Battery Power Conference, Aachen.

2021

• Klein, Sven, Wrogemann, Jens Matthies, van Wickeren, Stefan, Harte, Patrick, Bärmann, Peer, Heidrich, Bastian, Hesper, Jakob Michael, Borzutzki, Kristina, Nowak, Sascha, Börner, Markus, Winter, Martin, Kasnatscheew, Johannes, and Placke, Tobias. 2021. “Understanding the Role of Commercial Separators and their Reactivity towards LiPF6 on the Failure Mechanism of High-Voltage NCM523 || Graphite Lithium Ion Cells.” Advanced Energy Materials 12 (2): 2102599.. doi: 10.1002/aenm.202102599.