The increasing global momentum towards achieving climate neutrality has increased the need for advanced energy storage devices that go beyond the current lithium-ion battery technology. One of the emerging technologies with the most promise is lithium-sulfur (Li-S) batteries, which offer high energy density, cheap materials, and sustainable production at scale. There is a recently advertised postdoc in Li-S battery under the CoLi-SCo Project, which will provide a unique chance to combine advanced material science and battery engineering into the development of Li-S pouch cells.
About the CoLi-SCo Project
Collaboration between the academic and industry giants under the CoLi-SCo project provides the solution for tackling some of the existing obstacles in Li-S battery technology. The collaboration takes place at the Helmholtz-Zentrum Berlin, together with HIPOLE Jena, with the aim of advancing research from the materials science level to the system level, up to Technology Readiness Level 5 (TRL).
It is important to emphasize that TRL 5 differs significantly from most academic projects, which stop only at laboratory validation of their results.
Role Overview
The Postdoc will be involved in both fundamental and application-oriented research related to the development of Li-S batteries, covering all activities from materials characterization to cell fabrication and electrochemical investigation.
Specific duties will include:
- Advanced structural characterization of cathode materials by scattering techniques (small- and wide-angle scattering)
- Fabrication of single- and multilayer Li-S pouch cells
- Operando electrochemical investigations, which include galvanostatic cycling and impedance spectroscopy
- Development of new operando cell designs for the testing of new electrode materials
- Data analysis, publications, and scientific communication within an international research setting
The synergy between structural investigation and cell design renders this position extremely appealing for scientists who want to move forward from the mere synthesis of materials towards device engineering.
Why This Position Stands Out
There are several distinguishing features of this position compared to ordinary postdoc positions in battery research:
- Combination of advanced characterization techniques such as SAXS/WAXS with operando real-time analysis
- Participation in the process of pouch cell preparation, not just coin-cell work
- Industrial collaboration experience in an interdisciplinary consortium
- Scaling/validation at TRL 5 that is directly linked to commercialization process
This position is highly valuable for those researchers who seek to connect their work in academia with practical implementation in industry.
Postdoc in Li-S Battery Candidate Profile
The job role would be ideal for applicants who have significant experience working on electrochemistry and battery technologies, especially if they have practical laboratory experience.
Key qualifications required include:
- PhD in Electrochemistry, Materials Science, Chemistry, or a related discipline
- Hands-on practical knowledge of building batteries (2 and 3-electrode, pouch cells)
- Electrochemical characterization, including EIS, CV, GCD
- Structural characterization, preferably with experience in scattering techniques
- Knowledge of operando or advanced diagnostics
- Excellent fluency in both English and German
Any previous experience in industrial R&D and in designing cell geometries would be an advantage.
Postdoc in Li-S Battery Benefits
Joining the Helmholtz community has its definite advantages:
- World-class facilities for conducting research and interdisciplinary work
- Excellent networking possibilities in academia and industry
- Career development programs and training
- Public sector competitive salary (TVöD-Bund)
- Flexibility in work, 30 days of paid vacation, and other perks
The job is available as a one-year contract, with possible prolongation based on research progress and funds availability.
Strategic Perspective: Why Li-S and Why Now?
After many years of development and study, Li-S batteries still have to tackle a number of fundamental problems, such as the polysulfides shuttle effect, low lifetime, and electrode stability. Tackling such issues is impossible without understanding the underlying structure-performance relationship.
It is here that operando approaches and validation on the pouch-cell level can be helpful. Observing the dynamics and scaling beyond coin cells would allow revealing the mechanisms of failure that can easily go unnoticed in model cases.
In terms of applications, effective Li-S technology may change electric vehicle and grid battery industry because of its impressive theoretical capacity (about 2600 Wh/kg on the material level). But bringing such theory into practice is a difficult task.
Application Details for Postdoc in Li-S Battery
- PostDoc Position at Battery Electrochemistry Laboratory
- City: Berlin, Germany
- Organizations: Helmholtz-Zentrum Berlin, HIPOLE Jena
- Duration of Contract: 12 months (TVöD-Bund)
- Closing Date for Applications: 15 July 20
Postdoc in Li-S Battery Final Thoughts
For those researching within the realm of electrochemistry, energy storage, or materials science, this opening presents an excellent chance to learn practical skills in converting basic research into battery technology. The inclusion of operando studies, structural characterization, and pouch cell fabrication techniques is especially in line with the future of battery development research.
Postdoc in Li-S Battery FAQ
What is the main focus of the postdoc in Li-S battery?
This involves designing and studying lithium-sulfur (Li-S) batteries via state-of-the-art materials analysis combined with fabrication and operation testing of pouch cells.
What does Technology Readiness Level (TRL) 5 mean in battery research?
When referring to TRL 5, it relates to the validation of the technology within an appropriate environment. For the current work, it implies going from laboratory-scale to a Li-S pouch cell prototype under realistic conditions.
What experimental techniques are involved in the postdoc in Li-S battery role?
The role requires expertise in electrochemical techniques including GCD, CV, EIS as well as structural analysis including small- and wide-angle scattering (SAXS/WAXS).
Why are Li-S batteries considered important for future energy storage?
Li-S batteries offer an extremely high theoretical energy density (up to 2600 Wh/kg), low-cost materials, and abundant sulfur, making them attractive options for electric vehicle (EV) and grid storage applications.
What challenges do Li-S batteries currently face?
Major issues consist of polysulfide shuttle effect, inadequate cycle stability, volumetric expansion on cycling, and low conductivity of the sulfur cathode material.
What is meant by operando analysis in battery research?
Operando studies involve examining the changes in the structure and electrochemistry of the battery under operation, thereby enabling the examination of reactions and degradation processes.
Is experience with pouch cells necessary for postdoc in Li-S battery?
Yes, experience in manufacturing and testing pouch cells is desired since the project focuses on scaling up to the level of performance of devices.
Do applicants need to speak German?
The ideal candidate must be able to communicate fluently in both English and German.
What makes postdoc in Li-S battery different from typical academic postdocs?
While there are plenty of research jobs that emphasize only materials science, this is one of those positions that combine materials science with advanced characterization and full cell engineering with a focus on implementation.
Who is an ideal candidate for postdoc in Li-S Battery?
The perfect candidate should have a PhD degree in electrochemistry or materials science, extensive knowledge of battery systems, some experience with advanced characterization and be interested in implementation of their research.
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