Cellfion manufactures nanocellulose membranes for electrochemical energy storage and conversion. The company comes from leading research at KTH, Linköping University and RISE and develops membranes based on biomaterials from the forest - a solution that is both safe and sustainable for the environment. Cellfion's patent-pending technology can be applied in a range of applications central to renewable energy, such as redox flow batteries, electrolysers and fuel cells. Reliable, high-performance membranes are a requirement for the development of these green technologies.