An international team of scientists has presented a breakthrough technology for creating stable sodium-ion batteries (SIBs) with an anode made from recycled lavender waste.
Every year, agriculture produces 1,000–1,500 tons of such waste, and now high-porosity solid carbon has been derived from it — a material suitable for sodium ion storage.
To address the key issue of "sodium scarcity" in such eco-friendly materials, researchers tested three methods of pre-saturating the anode (pre-sodiation). The best results were achieved through electrochemical pre-sodiation, which provided the highest operational stability and energy density.
In conjunction with a cathode made of sodium, manganese, and nickel oxide, the lavender anode demonstrated a capacity of 360 mA·h/g with 67.4% retention after 100 cycles.
This achievement paves the way for the creation of low-cost and scalable sodium-ion batteries for stationary energy storage systems made from readily available and renewable raw materials.
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