Scientists astounded by performance of sustainable batteries with far-reaching implications for electric vehicles and devices.
, has developed some new carbon electrode materials based on an ice-templating system. These materials are called aerogels, where cellulose nanocrystals are formed into a porous structure using ice crystals that are grown and then sublimated. This leaves large channels within the structure that can carry the large sodium and potassium ions.
The performance of these new sodium and potassium ion batteries has been shown to outperform many other comparable systems, and it uses a sustainably sourced material — cellulose., Professor of Materials Science and Engineering at the University of Bristol and a world-leader in cellulose-based technologies, said: “We were astounded with the performance of these new batteries. There is great potential to develop these further and to produce larger scaled devices with the technology.
Jing Wang, lead author and a PhD student in the Bristol Composites Institute, said: “We proposed a novel controllable ice-templating strategy to fabricate low-cost cellulose nanocrystals/polyethylene oxide-derived carbon aerogels with hierarchically tailored and vertically-aligned channels as electrode materials, which can be utilized to well-tuning the rate capability and cycling stability of sodium and potassium-ion batteries.
“Benefiting from the renewability of the precursor and scalability at relatively low cost in the environmentally benign synthesis process, this work could offer an appealing route to promote large-scale applications of sustainable electric vehicles and large-scale energy storage grids in the near future.”
Professor Eichhorn said: “In light of these findings, we now hope to collaborate with industries to develop this strategy on an industrial scale and to explore whether this unique technology can be easily extended to a variety of other energy storage systems such as zinc, calcium, aluminium and magnesium-ion batteries, thus demonstrating its universal potential in next-generation energy storage systems.
France Dernières Nouvelles, France Actualités
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