Vision & Concept

The European HELENA project will contribute to the take-off of electric aviation, targeted for the next 5 to 10 years, thanks to manufacturing new solid-state halide batteries.

Nihil ad rem!


The world is experiencing a climate crisis with an increase of global temperatures since the end of the 19th century, and the only way to tackle this huge challenge is the reduction of greenhouse gas (GHG) emissions. In this sense, Europe is technologically and economically ready to lead this new paradigm called energy transition.

Taking into account that transport is responsible for 27% of total this gas emissions, with road transport and aviation as the main contributors, the route to get there is through the development of an efficient electrification of transportation.

But not only efficient, because there is a main differentiator for batteries produced in Europe: sustainability; which means a low carbon footprint and an optimised circular economy approach all along the value chain.


Halide solid state batteries for ELectric vEhicles aNd Aircrafts (HELENA) responds to the need of the development of a safe, novel high energy efficiency and power density solid state battery (4b generation batteries) cells, based on high-capacity Ni- rich cathode (NMC), high-energy Li metal (LiM) anode and Li-ion superionic halide solid electrolyte for application in electric vehicles and, especially in aircrafts.

HELENA will support Europe, in this sense, on its transition towards a climate-neutral continent since electric aviation is poised to take off within the next 5 to 10 years.


The main driving force behind R&I in battery materials deals with increasing the energy density of battery cells to enable better performance and cost- competitiveness of the electrification of vehicles and aircraft with non-European countries.

In fact, HELENA will overcome the consumer needs related to batteries, in terms of cost reduction, enabling scalable cell manufacturing, and increasing their capabilities for long distances and fast charging. Which will not only contribute to the boost of the electrification of transportation but also, help to achieve the European net-zero emissions objective by 2050.


The following timeline sets out the main milestones of the HELENA project.

  1. 01/06/2024

    Development, optimization, and upscaling of new materials.

  2. 01/12/2025

    Halide based solid state battery development

  3. 01/03/2026

    Testing, optimization and validation

Subscribe to our newsletter

If you want to know the latest trends in energy storage and new developments in research, subscribe.

Cookies on this website are used to personalize content and advertisements, provide social media features, and analyze traffic.