Researchers have developed a new sodium-ion battery anode by combining metals recovered from old mobile phone batteries with industrial lignin. This waste-to-waste approach creates a honeycomb-like structure that improves conductivity and stability, offering a more sustainable alternative to lithium-ion materials. The resulting composite shows strong capacity and cycling stability, making it a potential candidate for low-cost energy storage in electric vehicles and grid applications. By utilizing discarded electronics and biomass residues, the process reduces hazardous waste while lowering the cost of battery manufacturing.
