Postdoc in solid-state batteries - micromechanical modelling of cells

Kungliga Tekniska högskolan; Stockholms kommun; On-site; SEK 420,000 - 480,000; Full time

Job summary

KTH Royal Institute of Technology, a leading Swedish technical university, invites applications for a two-year postdoctoral position within the Department of Engineering Mechanics. The project focuses on micromechanical modelling and mechanical characterisation of solid-state battery cells, linking interfaces, fractures, and contacts to electrochemical performance.

The role requires a doctoral degree in related fields, strong modelling skills, and proficiency in English.

Qualifications

• A doctoral degree in Solid Mechanics or related field, with batteries knowledge is preferred.
• Strong computational and numerical modelling skills including FE or multiphysics.
• Proficiency in written and spoken English.

Responsibilities

• Develop a micromechanical modelling framework for solid-state battery cells.
• Link mechanical state to electrochemical performance and validate with experimental data.
• Contribute mechanical and structural characterisation of materials and cells.
• Collaborate with interdisciplinary teams within COMPEL initiatives.

Skills

Solid mechanics

Computational modelling

English proficiency

Team collaboration

Education

PhD in Solid Mechanics or related

Tools

Python

C++

Fortran

Finite element software

Job description

Postdoc in solid-state batteries - micromechanical modelling of cells

KTH Royal Institute of Technology, School of Engineering Sciences

Next leap in the battery development is expected to be lithium solid-state batteries (SSB), allowing the replacement of the flammable organic electrolyte in Li-ion batteries with a safer and a more compact solid electrolyte. Within the framework of the Swedish governmental battery initiative COMPEL, aimed to support competence and excellence in battery research and education for the transport sector, KTH join forces with a coordinated initiative on composite SSB with seven postdoctoral positions in several disciplines, focusing on various aspects along the battery value chain, ranging from synthesis, cell assembly, characterization, modeling to scaled-up manufacturing. The 2-year postdoc project Micromechanical modelling and mechanical characterisation of contact, interfaces and fracture in solid-state battery cells is hosted by the Department of Engineering Mechanics (Division of Material and Structural Mechanics) at the School of Engineering Sciences (SCI). In a solid-state cell, mechanics decides whether the cell works: unlike a liquid electrolyte, a solid cell must build and maintain every solid-solid contact under load, while ion insertion and extraction cause swelling and shrinkage and the interfaces between active material, electrolyte and current collector must keep both adhesion and conduction at the low stack pressures of a real application. The project develops a micromechanical modelling framework that resolves the cell at the scale of particles and interfaces and links its mechanical state to its electrochemical performance, representing interface debonding, fracture and particle fragmentation as the mechanisms that reshape the network of conducting contacts. The framework is validated against experimental data from the COMPEL collaboration and delivers a design and operating map, including the safe low-pressure operating window of the cell. The postdoc also contributes mechanical and structural characterisation of materials and cells developed in the other projects.

Qualifications

Requirements

• A doctoral degree or an equivalent foreign degree in Solid Mechanics, Engineering Mechanics, Computational Mechanics, Materials Science, Applied Physics, or a related subject, with some experience of batteries or battery materials. This eligibility requirement must be met no later than the time the employment decision is made.
• Proficiency in written and spoken English, as this will be required in day-to-day work.
• Strong computational and numerical modelling skills, including finite element or multiphysics simulation and scientific programming.
• Awareness of diversity and equal treatment issues with a particular focus on gender equality.

Preferred qualifications

• A doctoral degree or an equivalent foreign degree, obtained within the last three years prior to the application deadline.
• Experience with solid-state or lithium-ion batteries and familiarity with the mechanics and characterization of battery materials and cells.
• Hands-on experience with coupled electro-chemo-mechanical or phase-field fracture modelling, contact and micromechanics of particulate or composite materials, mechanical testing and X-ray tomography, and programming (e.g. Python, C++ or Fortran).
• An innovative mindset and ability to work independently.
• Good collaborative skills and abilities and interest in working in a team.

Great emphasis will be placed on personal skills.

Join us at KTH

KTH shapes the future through education, research and innovation. As a leading international technical university, we play an active role in advancing the transition towards a sustainable society. At KTH, you have the opportunity to grow and develop in a creative and dynamic environment, with good working conditions and attractive benefits. Equality, diversity and equal opportunities are essential to quality and form an integral part of KTH’s core values as a university and public authority.

About the employment

The position offered is for, at the most, two years.

It may be the case that a position at KTH is classified as a security-sensitive role in accordance with the Protective Security Act (2018:585). If this applies to the specific position, a security clearance will be conducted for the applicant in accordance with the same law with the applicant's consent. In such cases, a prerequisite for employment is that the applicant is approved following the security clearance.