Lennart Reuter

I am a chemist and battery researcher with expertise in electrochemistry, interfacial phenomena, and advanced battery diagnostics. My work focuses on understanding and mitigating degradation processes in lithium-ion batteries to extend their lifetime and performance.

• Interfacial side reactions in Li-ion batteries: Mechanistic studies of SEI formation, electrolyte oxidation, and transition metal dissolution.
• Operando diagnostics for detection of parasitic reactions: Development of a three-electrode setup for O₂ and transition metal quantification and improved OEMS methodology for gas evolution characterization.
• Porous electrode structure and Li-ion transport characterization: Development of advanced techniques using mercury intrusion porosimetry, He-pycnometry, and electrochemical impedance spectroscopy
• Battery aging and modeling: Linking degradation mechanisms to cell-level performance loss and lifetime prediction.

Publications    

• L. Reuter⁼, J. L. S. Dickmanns⁼, R. Morasch, S. Friedrich, A. Jossen, H. A. Gasteiger, “Changes in Structure and Ionic Resistance of Lithium-Ion Battery Graphite Electrodes – Part II: Impact of State-of-Charge” ChemRxiv (2025).

• J. L. S. Dickmanns⁼, L. Reuter⁼, R. Morasch, F. Maglia, R. Jung, H. A. Gasteiger, “Changes in Structure and Ionic Resistance of Lithium-Ion Battery Graphite Electrodes – Part I: Impact of Formation and SEI” Journal of The Electrochemical Society  172, 070513 (2025).

• L. J. Reinschlüssel⁼, L. Reuter⁼, M. Bock, P. Rapp, A. Berger, H. A. Gasteiger, “Temperature Dependence of the Chemical vs. the Electrochemical Electrolyte Oxidation in Lithium-Ion Batteries with Ni rich CAMs: Gas Evolution, Salt Decomposition, and Metal Dissolution”,Journal of The Electrochemical Society172, 060536 (2025).

• S. Kücher, A. Durdel, T. Schabenberger, F. B. Spingler, L. Reuter, A. Jossen, “Investigating the Impact of Various Binder Contents and Compression on Graphite Single-Electrode Dilatometry Measurements”, Journal of The Electrochemical Society 172, 020537 (2025).

• L. Reuter⁼, L. J. Reinschlüssel⁼, H. A. Gasteiger, “3-Electrode Setup for the Operando Detection of Side Reactions in Li-Ion Batteries: The Quantification of Released Lattice Oxygen and Transition Metal Ions from NCA”, Journal of The Electrochemical Society 171, 100524 (2024).

• M. Graf, L. Reuter, S. Qian, T. Calmus, R. Bernhard, S. Haufe, H. A. Gasteiger, “Understanding the Effect of Lithium Nitrate as Additive in Carbonate-Based Electrolytes for Silicon Anodes”, Journal of The Electrochemical Society 171, 090514 (2024).

• S. Friedrich, S. Helmer, L. Reuter, J. L. S. Dickmanns, A. Durdel, A. Jossen, “Effect of Mechanical Pressure on Rate Capability, Lifetime, and Expansion in Multilayer Pouch Cells with Silicon-Dominant Anodes”, Journal of The Electrochemical Society 171, 09503 (2024).

• L. Hartmann, L. Reuter, L. Wallisch, A. Beiersdorfer, A. Adam, D. Goldbach, T. Teufl, P. Lamp, H. A. Gasteiger, J. Wandt, “Depletion of Electrolyte Salt Upon Calendaric Aging of Lithium-Ion Batteries and its Effect on Cell Performance”, Journal of The Electrochemical Society 171, 060506 (2024).

• L. Reuter, J. L. S. Dickmanns, B. Strehle, L. Hartmann, F. Maglia, R. Jung, B. Suthar, H. A. Gasteiger, “Methods-Temperature-Dependent Gassing Analysis by On-Line Electrochemical Mass Spectrometry of Lithium-Ion Battery Cells with Commercial Electrolytes”, Journal of The Electrochemical Society 171, 050551 (2024).

• J. Altnöder, K. Krüger, D. Borodin, L. Reuter, D. Rohleder, F. Hecker, R. A. Schulz, X. T. Nguyen, H. Preiß, M. Eckhoff, M. Levien M. A. Suhm, “The Guinness Molecules for the Carbohydrate Formula”, Chemical Record 14, 1116-1133 (2014).

Conference Presentations

• L. Reuter, M. Bock, L. J. Reinschlüssel, D. Goldbach, A. Adam, B. Strehle, J. Wandt, H. A. Gasteiger, “Time-dependent Depletion of Electrolyte Salt and H₂ Evolution upon Calendaric Aging of Lithium-Ion Batteries”, poster presentation, International Conference on Sustainable Batteries (ICSB), Kolkata (India), 2025.

• L. Reuter, M. Bock, L. J. Reinschlüssel, D. Goldbach, A. Adam, B. Strehle, J. Wandt, H. A. Gasteiger, “Time-dependent Depletion of Electrolyte Salt and H₂ Evolution upon Calendaric Aging of Lithium-Ion Batteries”, poster presentation, IBA Annual Meeting 2024, Halifax, Canada (2024).

• L. Reuter, L. J. Reinschlüssel, H. A. Gasteiger, “Development of a 3-Electrode Setup for the Operando Detection of Parasitic Side Reactions: Exemplified at the Quantification of Released Oxygen”, oral presentation, 245^th ECS Meeting, San Francisco, USA (2024).

• L. Reuter, J. L. S. Dickmanns, S. Kücher, S. Friedrich, R. Morasch, A. Jossen, H. A. Gasteiger, “State-of-Charge Dependent Change in the Microporous Structure of Graphite Electrodes”, poster presentation, 244^th ECS Meeting, Gothenburg, Sweden, (2023).

• L. Reuter, B. Strehle, L. Hartmann, F. Maglia, R. Jung, H. A. Gasteiger, “Temperature-Dependent Gassing Analysis by On-Line Electrochemical Mass Spectrometry of Lithium-Ion Battery Cells with Commercial Electrolytes”, oral presentation, 243^rd ECS Meeting, Boston, USA (2023).

• L. Reuter, R. Morasch, J. L. S. Dickmanns, F. Maglia, R. Jung H. A. Gasteiger, “Temperature Dependent Formation of the Graphite SEI with Vinylene Carbonate Electrolyte Additive”, oral presentation, 241^st ECS Meeting, Vancouver, Canda (2022).

• Poster prize award
  IBA Annual Meeting 2024, Halifax, Canada.

• International Mobility Travel Grant
  IBA2025 Student Sponsorship Awards – 2024

• Conference Travel Grant
  German Academic Exchange Service (DAAD) – 2024 
  Travel support (200€) to present research 245^th ECS Meeting, San Francisco, USA

Professional Experience & Education

PhD Student, Technical University of Munich (TUM), Chair of Technical Electrochemistry, Germany
01/02/2019 – 30/06/2025
Title: “Studies on Interfacial Side Reactions and their Effects on Lithium-Ion Battery Lifetime and Performance”
Awarded: 27/06/2025 with summa cum laude

Research fellow and project leader, TUMInt Energy Research GmbH, Munich, Germany
01/09/2024 – 30/06/2025
Performance evaluation of all-solid-state batteries and organization of the Munich Battery Discussions 2025

Visiting researcher, Indian Institute of Technology Bombay, Mumbai, India
01/12/2024 – 28/02/2025
Modeling of solid-state battery electrode impedance and pressure build-up in commercial lithium-ion cells

Junior consultant, UnternehmerTUM Project GmbH, Munich, Germany
01/10/2017 – 30/04/2018
Development of new business models using passenger data in public transportation buses

Master of Science (TUM) in Chemistry Technical University of Munich (TUM), Germany
01/04/2016 – 02/12/2018 passed with distinction

Research assistant, BASF Advanced Chemical Co. Ltd., Shanghai, China 
01/04/2017 – 31/08/2017
Research internship within Explore Together program for the development of electro-depositable coatings

Bachelor of Science in Chemistry Georg August University of Göttingen, Germany