Materials Science Internship

Do you want to contribute to a more sustainable world? Are you excited to help shape the future of battery technology and consequently the future of consumer electronics and mobility? Can you not wait to dive into a VC-backed deep tech scale-up with the ambition to change the world?

We are looking for an enthusiastic  Materials Science Intern  to join our innovative and ambitious organization.

About LeydenJar

LeydenJar is a high-tech company, developing pure silicone anodes for a lithium-ion battery that will change the world. We are proud that, here at LeydenJar, we:

• boost Li-ion battery energy density by 70% by using 10x thinner anodes
• improved cycle life to >450
• achieved fast charging to 60% in under 10 min!

We are currently still in an R&D phase, but we are ready to start the actual production of anode foil. LeydenJar Plant One will open in 2026.


About the job

As a Materials Science Intern in the Si R&D Team, you will be responsible for analyzing the surfaces of silicon anodes to enhance the cycle life of 100% silicon-based anodes. You will collaborate closely with Material Scientists and Battery Scientists to understand the implications of your analyses. You will report directly to the Materials Scientist and the Head of Si R&D.

Your primary location can be in Leiden and it is acceptable to work remotely for one day a week. The duration of the internship would be a minimum of 3/6 months and must be required by your university.

Potential projects may involve utilizing surface and morphology characterization methods, conducting image analysis, performing data analysis, and preparing detailed reports.

About you:

• You are currently in the process of completing your Bachelor’s or Master’s studies in the Netherlands and are required to complete an internship as part of your studies. 
• You have or wiling to learn hands-on experiences on sophisticated lab equipment or have a strong interest in material characterization methods 
• You have a strong drive to learn
• You have fluent English reading and writing skills.
• You have a strong sense of curiosity and enjoy identifying the root cause of problems.
• Bonus points for interest in the energy transition and novel battery technologies. 

What can you expect from us ? 

• Market internship allowance.
• Unique experience in a rapidly scaling VC-backed start-up environment.

• Chance to work on potentially world-changing technology that can be a game changer to a range of industries and a key enabler for the energy transition.

• Great colleagues; at LeydenJar you will be part of a multi-national, ambitious, innovative and entrepreneurial team/20+ different nationalities!

Why LeydenJar?

🌟 Unleash your potential: Dive into a realm where personal growth meets ownership, with the backing to achieve your career aspirations.

💼 Benefits beyond the basics: Enjoy a treasure trove of perks, from a comprehensive pension plan to travel reimbursement, and even a mental health platform. And yes, there's fresh fruit every Monday because why not?

⏰ Work your way: Embrace the freedom of flexible hours and hybrid working. 

🍹 Thirsty for Fun: Join us every first Thursday for 'Thirsty Thursday,' where we unwind and share good vibes in a laid-back setting!

🎉 Fun with a purpose: Dive into our calendar of internal events, mixing business with pleasure, and fuel your personal development with exclusive trainings and courses.

Are you ready to take on the challenge as a  Materials Science Intern ?

We are looking forward to your application!

If you'd like to learn more about LeydenJar amazing team, see below:

At LeydenJar we value diversity, and we provide equal opportunities to all applicants without regard to race, color, ethnicity, religion, gender, pregnancy/childbirth, age, national origin, sexual orientation, disability, etc. If there are two or more applicants of equal suitability for a certain position, LeydenJar can under circumstances decide to select applicants based on positive discrimination in full compliance with all relevant and applicable law.