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Lithium-sulfur (Li-S) batteries are a promising candidate for next-generation energy storage systems due to their high theoretical energy density (2600 Wh kg-1), low cost, and environmental friendliness. However, the problems related to the electrode processes at the cathode of these batteries, namely the dissolution of the polysulfides (LiPSs) and the shuttle issues, cause a severe deterioration in efficiency, hindering their practical use. The present project aims to investigate multi-functional materials that can firmly trap LiPSs and accelerate the kinetics of the LiPSs redox reaction. Our strategy will be constructing an interconnected 3D network with high porosity built of a well-conducting skeleton with surface-immobilized active sites for effective trapping and converting LiPSs to Li2S.

The electrocatalytic properties of these nanostructured materials, tested by cyclic voltammetry (CV), linear sweep voltammetry (LSV), multi-cycling galvanostatic charging/discharging, and electrochemical impedance spectroscopy (EIS), will be correlated with (i) AFM imaging in PeakForceQNM and Kelvin probe mode, and (ii) microgravimetric measurements using electrochemical quartz crystal microbalance (EQCM). Additionally, DFT calculations will support the experimental studies explaining structure-reactivity correlation in Li-S batteries

The post-doc is expected to independently design, plan and conduct experiments. In addition, he/she will oversee the work of the PhD student.

Responsibilities:

- to prepare electrodes modified with a suitable catalyst and conduct electrochemical tests for a three- and two-electrode system.

- to analyze and explain the effect of redox processes on the morphology, mechanical properties and stability of the catalysts studied.

- to fabricate a prototype Li-S battery.

- to manage the project's tasks for its successful completion

- to disseminate of research results at project meetings, in peer-reviewed journals and at international conferences.

We offer a post-doctoral position (full-time employment) in the Institute of Physical Chemistry PAS with a gross salary of around 9650 PLN per month financed from the NCN OPUS 24 Project No. 2022/47/B/ST5/03077. 100% of the work time of the Postdoc will be devoted to the realization of the proposed project. The offer is for 12 months with possible extensions.

The selected candidate will gain experience and knowledge in the preparation and testing of materials for Li-S battery electrodes. The project involves electrocatalysis, nanotechnology, material science and physical chemistry.

The successful candidate will be eligible for all programs at the IPC PAS, including the IPC PAS Young Scientists competition and the IPC PAS Young Scientists Mobility competition.

The institute provides an opportunity to participate in ERASMUS+ programme.

1.  Ph.D. degree in chemical or physical sciences, obtained in the year of employment in the project or within 7 years before 1 January of the year of employment in the project. For researchers with multiple PhDs, the date of the first PhD award is deemed the reference date. The extension might apply according to the National Science Centre, Poland, rules.

2.  Publication record and experience in research.

3.  Ability to work independently as well as in a group.

4.  Skills in fabricating electrodes for electrochemical study in three- and two-electrode system.

5. Experience in electrochemical study

6. Experience in EQCM and AFM study will be appreciated.

6. The candidate should demonstrate good experimental skills in handling electrodes and a good understanding of electrode processes.

7.  Ability to communicate fluently in English (written and spoken).

8.  Strong motivation to work and solve scientific problems, creativity, and analytical thinking.

The Recruitment Commission will take into account the following criteria:

• competencies for specific tasks in the research project
• knowledge of electrochemistry
• previous scientific achievements
• awards and distinctions resulting from the conducted research