PhD Studentship: Exploring Microstructural Evolution in Quasi Solid State Li-S Batteries University College London in United Kingdom

The Advanced Propulsion Lab (APL) at University College London (UCL) is offering a fully funded PhD studentship in partnership with the Faraday Institution’s LiSTAR project. This research opportunity focuses on advancing the understanding of microstructural evolution in quasi-solid-state lithium-sulfur (Li-S) batteries, a technology with the potential for ultra-high energy density and improved safety profiles.

Quasi-solid-state Li-S batteries utilize low solubility electrolytes to promote a more solid-state conversion of sulfur, enabling operation with reduced electrolyte loadings and eliminating the need for LiNO3. Recent studies have demonstrated promising results, including over 80% capacity retention after 200 cycles with electrodes composed of S/C and LGPS. Building on these findings, the project aims to investigate the operating mechanisms of these cells, focusing on the variation in length and volume of polysulfides formed during cycling and the primary degradation modes of positive electrodes.

The research will address key questions such as:

• How does porosity in the sulfur electrode affect cyclability?
• Does the inclusion of Li-ion conducting materials like LGPS improve performance through enhanced conductivity or improved porosity?
• What is the impact of LGPS particle size and distribution on electrode performance?
• Is there a restructuring or physical evolution of the positive electrode during cycling?

To answer these questions, the student will employ advanced characterization techniques including X-ray computed tomography, X-ray diffraction, and Raman spectroscopy to spatially resolve physical and chemical changes in the electrodes. Electrochemical methods such as square wave voltammetry, galvanostatic cycling, and electrochemical impedance spectroscopy will be used to correlate microstructural evolution with electrochemical performance, ultimately identifying strategies to minimize degradation at the positive electrode.

The studentship is based in UCL’s Department of Chemical Engineering and is affiliated with the Faraday Institution’s LiSTAR project. The successful candidate will join a collaborative research environment and benefit from access to state-of-the-art facilities and expertise in battery technology.

Funding: The position is fully funded for UK-equivalent fees and provides a stipend of approximately £23,805 per annum for four years. Overseas students may apply but must cover the difference between UK and overseas tuition fees.

Eligibility: Applicants should have or expect to obtain a first or upper second class degree (1st, 2:1, and/or M.Sc.) in chemical engineering, chemistry, materials science, physics, or a related discipline. Experience with research methods, battery characterization, and electrochemistry is desirable. Strong written and verbal communication skills and the ability to work independently and collaboratively are essential. Eligibility for 'home' fees is required for full funding.

Application Process: Applications should be submitted via the UCL portal. Please nominate Dr James Robinson as supervisor and include a statement of interest. For informal enquiries, contact Dr James Robinson at [email protected]. The closing date for applications is 23rd April 2026, but the position may be filled earlier if a suitable candidate is found.

For further information about the MPhil/PhD course and recruitment process, visit UCL Chemical Engineering MPhil/PhD.

References:
[1] DOI: 10.1002/aenm.202503239
[2] DOI: 10.1038/s43246-025-00901-4