Scientist – Solvent & Process Chemistry (F/M/D)

Theion GmbH; Berlin; Vor Ort; EUR 65.000 - 90.000; Vollzeit

Zusammenfassung

Theion GmbH in Berlin seeks a Scientist – Solvent & Process Chemistry to advance sulfur crystal growth technology. You will design, synthesize, and optimize complex solvent systems and ionic liquids, driving scale‑up from lab to pilot production for Li‑S battery development.

PhD in Chemistry or related field with hands‑on ionic liquid/solvent synthesis (min 2 years) and strong analytical skills; willingness to relocate to Berlin; fluent English for internal communication.

Qualifikationen

• PhD in Chemistry or related discipline is required.
• Hands-on experience with synthesis of ionic liquids or solvents.
• Knowledge of analytical and physicochemical characterization methods for liquids.

Aufgaben

• Develop and deliver binary, ternary, and complex solvent systems.
• Synthesize and purify high-dielectric solvents with low viscosity.
• Synthesize and purify high-dielectric ionic liquids with low viscosity.
• Design solvents to achieve sulfur solubility and surface tension targets.
• Optimize chemical and thermal stability of liquids and ionic liquids.
• Design ionic liquids and solvents for compatibility under electric fields.
• Scale up production to 5 L for pilot production.
• Conduct structured experiments and present results.
• Collaborate with scientists and engineers to advance Li-S battery development.

Kenntnisse

Ionic liquids synthesis

Solvent synthesis

Analytical characterization

Ausbildung

PhD in Chemistry or related field

Jobbeschreibung

Scientist – Solvent & Process Chemistry (F/M/D)

Berlin

Full-time

Your mission

We are seeking a skilled and innovative scientist to develop process liquids for theion’s proprietary sulfur crystal growth technology. The ideal candidate will have a strong background in organic chemistry and hands‑on experience in the synthesis and purification of ionic liquids and solvents. This role focuses on designing, synthesizing, and optimizing complex solvent systems and ionic liquids with tailored properties for sulfur processing. As an integral part of the team, you will contribute to scaling these materials from laboratory development to pilot production and advancing theion’s next‑generation Li‑S battery technology.

• Develop and deliver binary, ternary, quaternary, and other complex solvent compositions
• Synthesize and purify high-dielectric-constant solvents with low-viscosity properties
• Synthesize and purify high-dielectric-constant ionic liquids with low-viscosity properties
• Design organic solvents to achieve specific sulfur solubility and surface tension
• Optimize the chemical and thermal stability of ionic liquids and solvents
• Design ionic liquids and solvents for compatibility under electric fields
• Functionalize small organic molecules
• Scale up ionic liquid and solvent production to 5L for pilot production
• Conduct structured experiments and independently analyze, interpret, and present results
• Collaborate closely with material scientists, chemists, electrochemists, and process engineers to advance Li‑S battery development

Your profile

Absolute-must-haves:

• PhD in Chemistry, Organic Chemistry, Materials Science, Electrochemistry or a closely related discipline
• Minimum 2 years of hands‑on experience in the synthesis of ionic liquids or solvents
• Willingness to relocate to Berlin
• Fluent in speaking English – our company language is English, incl. all internal communication and meetings.
• Knowledge of analytical and physicochemical characterization methods relevant to liquid systems.

Good-to-haves:

• Minimum 2 years of hands‑on experience in multi‑step organic synthesis of ionic liquids and/or solvents
• Understanding of molecular interactions of solvents and/or ionic liquids in high‑voltage electric fields and DEP
• Experience in protection and deprotection chemistry

About us

Headquartered in Berlin, Germany, theion GmbH is a pioneering high‑tech start‑up revolutionizing the mobile battery market. We specialize in the development and production of Crystal Batteries, addressing the world's most significant energy storage challenges across various sectors, from aerospace to consumer electronics. Our innovative approach utilizing sulfur in its crystal form promises to triple energy density while significantly reducing costs and environmental impact.