Every 5 June, World Environment Day reminds us of the urgent need to move towards a more sustainable energy model. However, we often forget that the energy transition does not depend solely on producing renewable energy, but also on something equally important: being able to store it efficiently, safely and sustainably.

Electrification is advancing at great speed. Electric vehicles, renewable energies, decarbonised industry, smart grids and new mobility solutions are already part of a transformation that will define the coming decades. But behind all these changes lies a fundamental technological challenge: how to store and manage that energy in a reliable and scalable way.

In this context, batteries and energy storage technologies have become a strategic element not only from an environmental perspective, but also from an industrial and geopolitical one. Europe is currently facing a double challenge: accelerating the energy transition while reducing its technological dependence and its reliance on critical raw materials in an increasingly competitive global scenario.

For this reason, the debate can no longer focus solely on having more batteries, but rather on developing better technologies: more sustainable, safer, more efficient and better adapted to the real needs of each application. The next generation of energy storage will have to combine performance, cost, recyclability, safety and material availability.

Technologies such as sodium-ion batteries, redox flow batteries, sulphur batteries, advanced electrolytes, thermal storage and other new energy management solutions are part of this effort to build more resilient and sustainable energy systems. Because the energy transition will not be possible unless we are able to develop scalable and accessible technologies for society as a whole.

Technologies such as sodium-ion batteries, redox flow batteries, sulphur batteries, advanced electrolytes, thermal storage and other new energy management solutions are part of this effort to build more resilient and sustainable energy systems. Because the energy transition will not be possible unless we are able to develop scalable and accessible technologies for society as a whole.

Furthermore, energy storage no longer affects only the automotive sector or renewable energies. Today we are also talking about batteries for drones, aerial mobility, industry, data centres, smart textiles and flexible electronics. Energy is ceasing to be an isolated element and is becoming a cross-cutting technological infrastructure that will shape a large part of future industrial innovation.

This paradigm shift also forces us to rethink how we understand energy innovation. It is no longer enough simply to develop a battery with greater autonomy. The challenge is much broader: to integrate safety, thermal management, fast charging, sustainability, digitalisation and industrial manufacturing capacity into increasingly complex solutions adapted to different applications.

Moreover, the energy transition will not be sustainable unless we address the challenge of critical raw materials. The growing global demand for lithium, nickel, cobalt and graphite is creating geopolitical tensions and risks for the supply chain that Europe cannot ignore. This is why researching technologies based on more abundant and accessible materials has also become a strategic priority.

In this scenario, Europe needs to strengthen its scientific and industrial capacity so as not to depend exclusively on external developments in key technologies. Energy storage will be one of the major pillars of technological competitiveness in the coming decades, and the ability to generate our own knowledge will make an important difference at industrial, economic and strategic level.

It will also be essential to accelerate collaboration between science, industry and institutions in order to reduce the gap between the laboratory and the market. Many promising technologies already exist, but the great challenge is to ensure that they can be manufactured in a competitive, scalable and sustainable way for real-world applications.

The energy transition will not only be a climate issue. It will also be a matter of innovation, industry and technological capacity. And along this path, energy storage will play a far more decisive role than we probably imagined only a few years ago.

Nuria Gisbert, Director General of CIC energiGUNE; Member of the Expert Committee of the Basque Parliament on the Basque Energy Agreement, member of the scientific advisory committee of the Vitoria-Gasteiz Green Deal and member of the Scientific Advisory Committee of the Basque Council for Science, Technology and Innovation of the Basque Country.

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