Sustainable energy storage

Redox Flow Battery Storage

A pioneering redox flow battery storage facility is being built at the Technology Center Laufenburg, offering impressive sustainable, safe and fully recyclable technology. It supports the integration of renewable energies by storing surplus electricity and releasing it again when needed. This stabilizes the grid, reduces the risk of outages and strengthens the security of supply in Switzerland and Europe.

Isometrische Grafik Redox-Flow-Battery
Definition

Why is battery storage necessary?

Batteriespeicher, erneuerbare Energie

Renewable energies such as solar, hydro and wind do not always supply electricity when it is needed. At the same time, the grid is under heavy strain due to the increase in electric vehicles with corresponding charging stations, the construction of heat pumps, local solar systems and generally higher energy demand. These factors mean that our energy system is facing a challenge on a scale never before seen in history.

This is where large battery storage systems come into play: a battery storage system reliably stores excess sustainable energy and makes it available again immediately when needed. Centralized large-scale storage systems are indispensable for the stability of the supraregional power grid and thus enable the further expansion of renewable energy sources such as wind, water and solar energy.

As with any battery, redox flow is based on an electrochemical principle. Unlike conventional batteries - such as lithium-ion systems - the electrolyte is not permanently installed, but is stored in tanks in liquid form with a high water content. This makes a redox flow battery non-flammable, durable, resilient and almost completely recyclable at the end of its service life.

RedoxFlow-Battery Schema
Redox-Flow Batteriespeicher Konzeptbild

Purpose and tasks

With our battery storage system, we are actively driving forward the energy transition and laying the foundations for an efficient energy future.

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Instantly available energy

The energy storage system can immediately store unused energy and release it just as quickly when needed.

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Ensuring grid stability

The energy storage system can compensate for frequency and voltage fluctuations and stabilize the power grid.

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Key element for the energy transition

Energy storage supports the use of renewable energy such as wind, solar and hydro power and can compensate for their uneven production patterns.

Facts and figures

Our technology combines energy and sustainability: with high storage capacity, maximum safety and environmentally friendly materials, the system sets new standards for a stable energy supply.

GWBattery performanceThe maximum power output of the storage facility corresponds to the output of the Leibstadt nuclear power plant.
GWh+Battery capacityThis corresponds to supplying 1 million households for 5 hours or 210'000 households for 24 hours.
%Water contentThe electrolyte consists largely of water - safe, environmentally friendly and resource-efficient.
%Non-flammable, non-explosiveMaximum safety thanks to non-flammable and non-explosive technology
Why redox flow?

Why we rely on redox flow

Since redox flow batteries use non-flammable, aqueous electrolytes, they are extremely safe and have a very long service life without any significant loss of capacity. In addition, they do not require any critical raw materials and are easily recyclable - a clear environmental advantage over lithium-ion technologies.

This makes redox flow batteries the sustainable, safe and scalable solution for large-scale energy storage.

Vergleichstabelle Flow-Batterien und Lithium Ionen Batterien
Functionality

How does a redox flow battery work?

The basic functioning based on the example of vanadium redox flow batteries.

Basic principle

Energy is chemically stored in vanadium electrolytes. Energy is stored in the electrolyte tanks through reduction or oxidation (“redox”).

Electrolyte system

A basic system consists of two tanks containing positive electrolyte (catholyte) and negative electrolyte (anolyte).

Cell

Electrolytes are pumped through a cell with an ion-selective membrane. The ions migrate through the membrane, thereby changing the oxidation state.

Energy flow

During charging, electrical energy is converted into chemical energy; during discharging, this chemical energy is converted back into electrical energy.

Sustainability in the spotlight

With our battery storage system, we are contributing to the energy transition and laying the foundations for an efficient energy future.

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Safety

Redox flow batteries are non-flammable and non-explosive. This distinguishes them significantly from lithium battery storage solutions.

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Recyclability

The liquid used can be almost completely recovered and reused, conserving resources and minimizing waste.

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Maintainability

Thanks to the “simple” design and easy accessibility of all system components, every part of the battery can be repaired.
The electrolyte can also be recycled and reused if contaminated.

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Cost comparison

The costs per megawatt hour stored can be compared over the entire service life of the system. The long service life puts the initially higher investment costs into perspective.

Redox flow meets artificial intelligence

An energy system of the future

KI-Rechenzentrum Konzeptbild
Sovereign AI-Factory

AI data center of the future

The AI data center combines cutting-edge technology with the highest security standards and guarantees a future-proof, scalable solution for hyperscalers. The FlexBase “Sovereign AI Factory” sets new standards in terms of performance, security, sustainability and future-proofing.

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Europe's technology hub

New construction of the technology center

The construction of the new technology center will create a modern campus for energy and innovation in Laufenburg. Covering an area of 40,000 m², the campus will combine battery storage, an AI data center, office space and laboratories. Sustainable construction, the highest safety standards and energy-efficient infrastructure make the site a showcase project for European technology development.