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FLUFFY – Fluoride-based Na-ion battery cathodes for stationary energy storage

The FLUFFY project aims to accelerate stationary energy storage research by developing cathodes for advanced sodium-ion batteries.

About the project

The FLUFFY project aims to accelerate the research on stationary energy storage by developing better components for sodium-ion batteries. In this project, the scientists focus on finding fluoride-based cathode materials that can make sodium-ion batteries perform even better, with respect to voltage window, cycling performance and stability. FLUFFY project brings together a diverse team of experts who work together to create and study these new materials in real-conditions using advanced techniques, with the constant goal of finding cleaner and more sustainable ways of storing green energy.

Objectives

The FLUFFY project will focus on identifying fluoride-derived materials as cathode materials that maximize the electrochemical performance, lifetime and minimize the environmental footprint of sodium-ion batteries. The high electronegativity of fluorine enhances the electrochemical performances and chemical stability, making these materials ideal for battery applications. Our mixed-anion approach will further modify the fluoride chemistry to increase ionic and electronic conductivity.


The project's multidisciplinary approach brings together a diverse team of researchers with a solid background in solid-state chemistry, battery materials, electrochemistry, modelling and operando techniques. These experts will work together to synthesize and study the electrochemical behaviour of fluoride-derived materials in real-time using operando techniques, making a significant contribution to energy storage technology. As a Researcher Project for Young Talents, FLUFFY provides young researchers a unique opportunity to collaborate towards a common goal and make a meaningful impact in one of Norway's top-priority research (technology) fields.

Background

The world is facing an energy and climatic crisis, and a major transition to renewable energy sources is needed to attain the climate commitment. As we count more on weather-dependent sources like solar and wind power, it's crucial to have a reliable way to store and inject their electricity into the network when needed. Stationary energy storage systems, such as batteries, can stock this intermittent energy, avoid wasted electricity or shortage, and open possibilities in rural areas on continents where grids are limited.
While Lithium-ion batteries (LIBs) are currently the preferred technology for electric mobility, there are concerns about the long-term availability, sustainability and cost of raw materials such as cobalt, nickel, lithium, or copper. New types and generations of high-performance, safe, sustainable, and affordable batteries are needed for stationary storage. Sodium-ion batteries (SIBs) are well suited for this application, as they are considered safer than LIBs for multiple reasons, and more importantly, the critical materials utilised in LIBs can be replaced in SIBs with widely abundant and sustainable counterparts. SIBs are paving the way towards a greener, lower-cost next-generation stationary energy storage technology.

Financing 

The project is financed by the Research Council of Norway (no. 343193 (NFR.no)). Grant amount: 8 million NOK.  

Project period

2023-2026

Collaborations and infrastructure

The project is a collaboration between the NAFUMA group at the Centre for Materials Science and Nanotechnology (SMN, UiO), the Institute for Energy Technology (IFE, Kjeller) (ife.no), and the CRISMAT Laboratory (CNRS, Caen, France) (crismat.cnrs.fr).

Publications

  • Fjellvåg, Øystein Slagtern; Saha, Dipankar; Chernyshov, Dmitry; Bernal, Fabian Leonardo Martinez; Fjellvåg, Helmer & Hauback, Bjørn Christian [Show all 7 contributors for this article] (2025). On the low temperature crystal structure of KCrF3. Journal of Solid State Chemistry. ISSN 0022-4596. 352. doi: 10.1016/j.jssc.2025.125558. Full text in Research Archive
  • Fjellvåg, Øystein Slagtern; Park, Heesoo; Veillon, Fabien; Lyu, Jike; Medarde, Marisa & Amedi, Salah Bra [Show all 10 contributors for this article] (2025). ACrF3 Jahn–Teller-Distorted Fluoroperovskites: Expanding to RbCrF3 and CsCrF3. Inorganic Chemistry. ISSN 0020-1669. 64(36), p. 18316–18322. doi: 10.1021/acs.inorgchem.5c02668. Full text in Research Archive
  • Gonano, Bruno; Fjellvåg, Øystein Slagtern; Steciuk, Gwladys; Marshall, Kenneth; Fjellvåg, Helmer & Valldor, Björn Martin (2025). PVDF fluorination of La₄Co₃O₁₀: Synthesis, structure and physical properties of La₄Co₃O₁₀F₂. Scripta Materialia. ISSN 1359-6462. 255. doi: 10.1016/j.scriptamat.2024.116379. Full text in Research Archive
  • Fjellvåg, Øystein Slagtern; Gonano, Bruno; Bernal, Fabian Leonardo Martinez; Amedi, Salah Bra; Lyu, Jike & Pomjakushin, Vladimir [Show all 12 contributors for this article] (2024). Order-to-Disorder Transition and Hydrogen Bonding in the Jahn-Teller Active NH4CrF3 Fluoroperovskite. Inorganic Chemistry. ISSN 0020-1669. 63(23), p. 10594–10602. doi: 10.1021/acs.inorgchem.4c00931. Full text in Research Archive

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Tags: Batteries, Climate, Climate change, Technology, Nafuma
Published Oct. 3, 2023 5:05 PM - Last modified July 29, 2025 12:52 PM

Participants

Detailed list of participants